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“Assessing Today for a Better Tomorrow”: An observational cohort study about quality of care, mortality and morbidity among newborn infants admitted to neonatal intensive care in Guinea

Background Neonatal mortality in Guinea accounts for about 30% of all fatalities in children younger than five years. Countrywide, specialized neonatal intensive care is provided in one single clinic with markedly limited resources. To implement targeted measures, prospective data on patient characteristics and factors of neonatal death are needed. Objective To determine the rates of morbidity and mortality, to describe clinical characteristics of admitted newborns requiring intensive care, to assess the quality of disease management, and to identify factors contributing to neonatal mortality. Methods Prospective observational cohort study of newborns admitted to the hospital between mid-February and mid-March 2019 after birth in other institutions. Data were collected on maternal/prenatal history, delivery, and in-hospital care via convenience sampling. Associations of patient characteristics with in-hospital death were assessed using cause-specific Cox proportional-hazards models. Results Half of the 168 admitted newborns underwent postnatal cardiopulmonary resuscitation. Reasons for admission included respiratory distress (49.4%), poor postnatal adaptation (45.8%), prematurity (46.2%), and infections (37.1%). 101 newborns (61.2%) arrived in serious/critical general condition; 90 children (53.9%) showed clinical signs of neurological damage. Quality of care was poor: Only 59.4% of the 64 newborns admitted with hypothermia were externally heated; likewise, 57.1% of 45 jaundiced infants did not receive phototherapy. Death occurred in 56 children (33.3%) due to birth asphyxia (42.9%), prematurity (33.9%), and sepsis (12.5%). Newborns in serious/critical general condition at admission had about a fivefold higher hazard to die than those admitted in good condition (HR 5.21 95%-CI 2.42–11.25, p = <0.0001). Hypothermia at admission was also associated with a higher hazard of death (HR 2.00, 95%-CI 1.10–3.65, p = 0.023). Conclusion Neonatal mortality was strikingly high. Birth asphyxia, prematurity, and infection accounted for 89.3% of death, aggravated by poor quality of in-hospital care. Children with serious general condition at admission had poor chances of survival. The whole concept of perinatal care in Guinea requires reconsideration.


Introduction
The neonatal period, defined as the first 28 days of life, is the most vulnerable time for an infant's survival. Worldwide, approximately three million newborn deaths are recorded each year, the majority, though, die unregistered at home [1]. Eight Millennium Development Goals (MDG) were defined by the United Nations (UN) in 2000, with the fourth goal focusing on the reduction of the under-five-mortality rate by two-thirds between 1990 and 2015 [2]. In 2016, the Sustainable Development Goals (SDG) were developed by the UN as successors to the MDG with the third SDG focusing on improving child and maternal health. Specifically, target 3.2.2 of the SDG calls for a reduction in neonatal mortality in all countries to twelve or fewer deaths per 1,000 live births by 2030 [3]. Due to national and international achievements, the global neonatal mortality rate (NMR) fell by 51 percent from 37 deaths per 1,000 live births in 1990 to 18 in 2017; however, neonatal deaths still account for 47 percent of worldwide under-five deaths [4]. Globally, half of the infants dying within their first 28 days lose their lives within the first day of life, two-thirds within the first week [5]. Despite a declining global NMR, marked disparities in the level of neonatal deaths exist across regions, with a low NMR of fewer than twelve deaths per 1,000 live births in developed countries and a persistently high NMR of 28 deaths per 1,000 live births in sub-Saharan Africa [6].
The Republic of Guinea is a poverty-stricken West-African country, with a high burden of disease, an ill-equipped public healthcare system, underpaid health workers, and poor sanitation [7]. Guinea decreased its NMR by half from 62 deaths per 1,000 live births in 1990 to 31 deaths per 1,000 live births in 2018; still accounting for 14,000 newborn deaths annually and representing almost one-third of all fatalities in children younger than five years [6]. The discrepancy between the current NMR and the proclaimed SDG target highlights the urgency of diminishing newborn death in Guinea. Preventing newborn deaths specifically is ever more important not only because of the increasing proportion of neonatal death among under-five fatalities but also because the required health interventions that are needed to address the main causes of neonatal mortality mostly differ from those required to address other underfive deaths [8].
In 2016, the major causes of neonatal death worldwide were birth asphyxia (BA, 31%), prematurity (27%), and sepsis (21%) [9,10]. Importantly, most neonatal deaths are preventable by simple and affordable interventions, such as clean birth conditions, birth attendants trained in basic newborn resuscitation, postpartum bag and mask respiratory support, access to antibiotics, and external heat sources, such as maternal skin-to-skin contact [11]. Antenatal care and skilled support during birth are infrequent in Guinea and depend markedly on the household wealth as well as the residential proximity to urban areas [12]. Less than half of the effectively required nurses and midwives for maternal and neonatal health services are currently available in Guinea, and the existing health workforce is concentrated in large cities due to urbanization [13]. Fully functioning emergency obstetric and neonatal care units are only available in three percent of all health facilities, all of those being reference hospitals [14]. Nationwide, specialized neonatal intensive care at university-level is only provided in a single clinic in the capital, operating under the restraint of pronounced resource scarcity. Since 2015, the maternity ward of the joined university hospital has been closed for construction. Therefore, all neonatal admissions are outborn babies referred postnatally to the neonatal unit without assistance during transfer and often with considerable delay, increasing their risk of death [15].
To facilitate the implementation of targeted specific measures and increase their respective impact, it is crucial to identify potential causal factors leading to neonatal morbidity and mortality. The objectives of this study were to: (1) determine the rates of neonatal morbidity and mortality at the only specialized neonatal intensive care unit (NICU) in Guinea, (2) describe the clinical characteristics of the hospitalized patient population, (3) document and assess the currently available care, as well as (4) identify potential factors contributing to neonatal death. The overall aim of this study was to gain a better understanding of the status quo of newborn healthcare in Guinea in order to identify areas of improvement and contribute to the decrease in the NMR as envisioned by the SDG.

Materials and methods
A prospective observational cohort study was conducted at the Institute of Nutrition and Child Health (Institut de Nutrition et de Santé de l'Enfant, INSE) of all admitted newborns and their follow-up until discharge or death during a 30-day period from February 15 th to March 16 th 2019. Ethical approval was granted from the Comité National d'Ethique pour la Recherche en Santé (CNERS) in Guinea (Ref. 035/CNERS/19). The written informed consent was signed by a parent or legal guardian prior to collecting and analyzing data.

Hospital setting
INSE is adjacent to the large public university hospital Donka and functions as the only specialized NICU in Guinea with a theoretical catchment area of the whole country with a population of 13.4 million inhabitants [16]. However, very few newborns outside the wider Conakry area, with a population of about 1.9 Mio inhabitants, are presented at INSE [17]. The unique shape of the capital city, a slim peninsula with all important facilities located at the coastal end and only two main roads connecting all suburbs with downtown Conakry, causes major traffic congestion and access difficulties to the medical care center. The Donka University Hospital has not offered obstetric services since 2015 due to renovation of the maternity ward. Therefore, all admitted neonates were born in other facilities or at home, and, consequently, had to be transported postnatally to INSE.
On average, 4500 children are hospitalized annually at INSE, more than half of them in the neonatal department. Reasons for neonatal admissions include prematurity and low birth weight (LBW, <2500 g), poor postnatal adaptation, out-of-hospital reanimation, respiratory distress, bleeding, fever or other signs of infection, poor feeding, and congenital malformations. The architectural structure of the neonatal department offers only very limited space with overcrowded rooms and patients often sharing beds. The critical care unit accommodates 15-20 newborns. Further 25-30 newborn infants, once stabilized, are cared for in two more rooms. In each unit, one pediatrician is in charge supervising a general practitioner and an intern doctor from 9 am to 3 pm. After 3 pm, one general practitioner and two medical students assume the night shift for the whole neonatal department. Two specialized neonatologists work at the facility as consultants during daytime. The Kangaroo Mother Care (KMC) unit houses four premature newborns and their mothers, under the surveillance of a nurse teaching skin-to-skin-nursing. The other mothers stay in self-supply dormitories on the premises. The hospital is ill-equipped and underfunded. There had been no air conditioning at the time of the study and power outages were frequent. Solar panels power emergency lighting, oxygen extractors, and the one available phototherapy lamp. Equipment is of inferior quality and deteriorates quickly due to heat, dust, humidity, and power instability. Infants sleep in plastic cradles or makeshift wooden boxes. All medication and medical supplies have to be purchased by the parents after medical prescription, even in cases of emergency. Breastfeeding is encouraged according to the newborns' general condition and gestational age; otherwise, the newborns are fed with expressed breastmilk or formula milk via nasogastric tube, cup, or spoon. Premature or hypothermic newborns are placed in plastic bags and externally heated under a shared radiant warmer, or with the help of warm water bottles.

Management of admitted newborns
Managing admitted newborns, medical staff followed the guidelines of Advanced Neonatal Care by Médecins Sans Frontières (MSF) who had trained local personnel over several occasions until 2016. These guidelines are based on the World Health Organization (WHO) Essential Newborn Care guideline [18]. Vital parameters (axillary temperature, heart rate, respiratory rate, and peripheral oxygen saturation) were obtained using a digital thermometer and pulse oximeter, respectively. The body weight and findings of a full-body exam were recorded at admission. Respiratory distress was categorized as mild, moderate, or severe using the Silverman Score [19]. Interventions included airway suction for clearance, positive pressure ventilation for non-breathing infants with an Ambu 1 breathing bag, and oxygen therapy using oxygen concentrators with their output shared via Y-pieces of nasal cannula. Continuous positive airway pressure (CPAP), intubation, and mechanical ventilators were not available to assist newborns with respiratory distress. Nota bene, all pharmacological treatments were only administered if they were available, and had been purchased by the parents in the in-hospital or external pharmacies. Patients were routinely administered 1 mg of intramuscular Vitamin K if not yet injected in the obstetric clinic. Caffeine citrate (loading dose 10 mg/kg/day, maintenance dose 5 mg/kg/day) was given to premature newborns with gestational age <34 weeks or once apnea was noted. Cardiac arrest and bradycardia defined as heart rate below 60 beats/ minute were treated with bag and mask ventilation and manual chest compressions. Anemia was defined as severe when the hemoglobin level was below 14 mg/dl. In case of severe anemia or active bleeding, blood transfusions with 20-25 ml/kg of concentrate red cells over 180-240 minutes were given. Neonatal jaundice was evaluated according to the Modified Kramer's Scale as well as serum bilirubin levels, if available [20]. Phototherapy was used to treat jaundice with four hour-long sessions at a time; however, light therapy was often withheld due to hyperthermia. Intravenous antibiotic treatment was administered to newborns, for at least 48 hours, if either sepsis was being suspected (based on clinical signs and/or laboratory results), or if infection could not be excluded (unavailable prenatal history or laboratory results). No hemocultures were available. Ampicillin 50 mg/kg/day and gentamycin 5 mg/kg/day were administered to all patients without clinical signs of sepsis but suspected infection; ampicillin 100 mg/kg/day, gentamycin 5 mg/kg/day, and cefotaxime 100 mg/kg/day were given to children with clinical signs of sepsis or proven meningitis. Blood glucose levels were measured using a commercial glucometer. Hypoglycemia was defined as blood glucose below 2.5 mmol/l and treated with an intravenous bolus of 2 ml/kg of 5-10% dextrose followed by feeding or maintenance with 5-10% dextrose. In Guinea, 10% dextrose for intravenous application is not commercially available and had to be reconstituted from 30% dextrose and 5% dextrose. Children with birth asphyxia (BA) were categorized clinically as either mild, moderate, or severe hypoxic-ischemic encephalopathy (HIE) using the Sarnat staging [21]. Seizures were treated with 2mg of rectal diazepam, followed by oral maintenance with 5-10 mg/kg/d of phenobarbital. Radiological investigations, such as chest or abdominal X-rays, echocardiography, or ultrasound were not available on site and therefore rarely obtained due to lacking financial parental resources, restricted opening hours of the external imaging department, and difficulties related to transporting unstable newborns. Full blood counts and levels of C-reactive protein were available 24 hours per day; cerebrospinal fluid cell count with gram stain, blood films, bilirubin, and electrolyte measurements were only available during the daytime and were often not reliable due to equipment malfunction. Blood or liquor cultures were not available.

Data collection methods
Inclusion criteria were infants admitted to INSE during their newborn period (�28 days of life) between February 15 th and March 16 th 2019, who were alive at the time of admission and whose parents had signed the informed consent form. Newborns who died before or at the time of their arrival at INSE and/or whose parents denied processing of their child's data were excluded from the study. All infants were recruited in this study via convenience sampling. All information related to the hospitalized newborns was documented by physicians and nurses in the standard hospital paper charts. If available, data were collected on maternal history, prenatal and obstetric care, delivery, neonatal conditions, in-hospital management, and laboratory investigations. Provisional diagnoses and presumed causes of death were given by the treating doctor and discussed in the daily morning interdisciplinary staff meeting. Specific definitions used in this study are listed in Table 1. All data recorded for this study were entered in an excel sheet for further analysis.

Data analysis
All analyses were performed using the R system for statistics and graphics version 4.0.4 [24]. Neonatal outcome was categorized into four different, mutually-exclusive states: patients who were cured during hospital stay (cure), deceased during hospital stay (death), were transferred to a different clinic (transfer), or were discharged early for whatever reason (early discharge). For simplicity, the latter two states were combined to a single one (other discharge). We descriptively analyzed how pre-, peri-, and postnatal characteristics may be related to neonatal mortality, stratifying characteristics by neonatal outcome. Frequency and percentage were tabulated for categorical variables, mean and standard deviation for continuous variables. In addition, we fitted a cause-specific Cox proportional-hazards model to assess the associations of patient characteristics at hospital admission with the outcome death (time to in-hospital death), censoring patients with other outcomes (cure or other discharge) at hospital discharge.
Explanatory variables in the model were admission weight (in 100 g units), hypothermia (<36.5˚C) at admission, neonatal CPR and a dichotomization of general condition and neurological condition into good/ fair vs. serious/critical. Neonatal time to death, cure or other discharge after hospital admission was visualized by cumulative incidence curves. A map of Conakry was produced using the R packages rnaturalearth and rnaturalearthhires, which provided the high-resolution polygon of Guinea, and ggplot2 for plotting the country together with the places of birth of the newborns [25][26][27].

Results
During the study period, 221 infants were brought to the Neonatology Department at INSE (Fig 1). Ten of those were older than 28 days. Of the 211 newborns that were presented at the clinic, 15 were already dead at arrival and eight newborns died during the admission process without further documentation. Additionally, 17 neonates were recorded to be admitted but their outcomes remain unclear due to missing medical forms. Three parents refused to sign the informed consent form. The remaining 168 newborns (79.6%) were included in the study.

Neonatal mortality
Death occurred in 56 of the included 168 newborns (33.3%, 95%-CI 0.27-0.41). To appreciate the true neonatal mortality rate of patients that were supposed to be treated at INSE, additional

Term Specific definition
Birth asphyxia (BA) Neither Apgar scores nor measurements of umbilical pH were routinely available. Absence of immediate cry after birth and neonatal reanimation (pulmonary or cardiopulmonary resuscitation) were used as criteria to define BA.

General condition
Clinical evaluation at admission by the physician assessing the following criteria: skin color, Silverman score, respiratory rate, heart rate, temperature, central and peripheral perfusion, peripheral oxygen saturation, and alertness. Categorization into fair, serious, and critical.

Gestational age
Because no gestational age was reported for any newborn, the Ballard Score was used to estimate the gestational age [23].

Maternal health
Maternal characteristics that were available in at least two-thirds of the cases are shown in Table 3, stratified by neonatal outcome. In general, information regarding maternal health was sparse. Highly relevant aspects for the newborn, such as complications in earlier pregnancies, nutrition, vaccinations, TORCH serology, and medication were missing in almost all cases. Exemplarily, maternal testing for hepatitis B infection was documented in only 25% of cases (3/42, 7.1% hepatitis B positive); testing for maternal diabetes and HIV infection was merely recorded in 41.7% (1/ 70, 1.4% diabetic) respectively 44.6% of cases (3/75, 4% HIV positive). More than two-thirds (114 women, 67.9%) did not receive the recommended four antenatal care assessments as recommended by the WHO [28]. A large proportion of mothers (43/116, 37.1%) were uneducated.

Obstetric information
Since all newborns were born outside of INSE, data regarding delivery and adaptation at birth were not available in a substantial proportion of cases. Obstetric information that was available in at least two-thirds of the cases is shown in Table 4, stratified by neonatal outcome. The majority of births were assisted by trained birth attendants in either public or private clinics (149/161, 92.5%; of which 94/161, 58.4% in public and 55/161, 34.2% in private clinics) whereas 7.5% of newborns (12/161) were born at home. Three-quarters of infants were born by uncomplicated vaginal birth (125/166, 75.3%). Poor adaptation, i.e. no immediate cry after birth, needing cardiopulmonary resuscitation (CPR) occurred in 84 infants (50.9%). However, information regarding the duration and measures of CPR was attainable for only 14 children (17.3%). Just one newborn (0.6%) had an Apgar score recorded. Furthermore, notes confirming or negating birth complications were present in 1.7% of cases (3/168

Patient characteristics at admission
Detailed patient characteristics at admission that were documented in at least two-thirds of the cases and stratified by neonatal outcomes can be seen in

Patient pathologies and management
A detailed overview of the most common patient pathologies stratified by neonatal outcomes is presented in Table 6. Details regarding prematurity are listed in Table 4. Details of interventions that were documented in at least two-thirds of the cases and stratified by neonatal outcomes can be seen in Table 7.
The mean duration of hospitalization at INSE was 13 days (±8.2 days) with cured newborns staying longer (16.6 ±7.2 days) than those infants who passed away (7.5 ±6.6 days). Most

PLOS ONE
septic' and got antibiotic treatment although they did not fulfill the clinical and laboratory criteria. Only one child (0.6%) was in a well enough condition to be considered non-septic and was not given antibiotics. Hematological diseases were found in 57 newborns (33.9%) with , gastroschisis (n = 1), encephalocele (n = 1), VACTER-syndrome (n = 1), cleft palate (n = 1), polydactyly (n = 1), and club foot (n = 1). One newborn had multiple dysmorphic features that could not be linked to a definitive syndrome. 20 infants (11.9%) suffered from microcephaly, an additional seven children (4.2%) had global intrauterine growth retardation, although these data are to be seen in the context of a gestational age only estimated by Ballard score. Six newborns (3.6%) suffered from malnutrition and dehydration. Of all infants that lived long enough to be fed, 41

Potential factors associated with neonatal death
We identified two factors present at admission that were significantly associated with neonatal death (  hazard to decease in comparison to those infants who did not require resuscitation (HR 9.37, 95%-CI 5.01-17.50, p<0.0001). The necessity for oxygen supplementation was also associated with an about twofold hazard of neonatal death (HR 2.57, 95%-CI 1.23-5.38, p = 0.012). The reason for these potentially life-saving interventions being associated with higher hazards of death could be that a newborn in need of such an intervention is already in very serious condition. Contrary to our assumption, discontinuous antibiotic treatment seemed to half the hazard of neonatal death (HR 0.54, 95%-CI 0.31-0.95, p = 0.032).

Discussion
Neonatal mortality remains a significant public health burden in Guinea with 31 deaths per 1,000 live births in 2018. To provide evidence for the implementation of targeted interventions aimed at the reduction of neonatal mortality in accordance with SDG 3.2, we performed a study on neonatal morbidity and mortality, patient characteristics, quality of care, and potential risk factors leading to neonatal death at INSE, the only NICU in Guinea. Our main findings are: The most common disease entities treated at INSE were respiratory distress, prematurity, BA, hypothermia, neonatal sepsis, and jaundice. The most relevant contributors to neonatal death are, consistent with the worldwide pattern, BA, prematurity, and infection [5]. In general, hospitalized newborns at INSE arrived on their day of birth, in serious general and neurological condition, and were shown to be multimorbid. Perinatal and in-hospital quality of care proved to be poor due to insufficient and badly functioning equipment as well as lacking financial and structural resources. Finally, factors significantly associated with inhospital death included serious/critical general condition and hypothermia at admission, as well as a need for oxygen therapy and in-hospital CPR.
The results represent an important step towards understanding the current challenges in Guinean neonatal care and identifying the most promising and impactful areas for targeted interventions in perinatal medicine. However, the presented results should be interpreted with care considering that this study was conducted in the largest urban agglomeration of Guinea and included only outborn newborns admitted at the only hospital in the country equipped with a NICU facility. Not representative for the whole country, these data, however, are a fundamental mirror of perinatal care and referral practice in the capital area representing 14.7% of the total Guinean population [29].

Neonatal mortality and causal factors
Of all the newborn infants arriving at INSE with known outcome, 41.4% fatalities were recorded, including 7.9% of patients dead or dying at arrival. The NMR of infants who were alive at admission was 33.3%. Neighboring and economically comparable Guinea-Bissau reported a similarly high NMR of 19.6% at their main NICU [30]. How many newborns have deceased on their way to the hospital and were never presented for confirmation of death remains unknown. Out of all live admitted newborns, one-quarter deceased on their day of birth, which at first seems less than the globally reported proportion of almost one-third [5]. However, if we include the 23 fatalities before and at arrival, this proportion rises to almost half of all newborn deaths. Consistent with previously published data, three-quarters of newborns died within the first week of life [31]. Among the children who died, male newborns were overrepresented compared to female newborns mirroring similar data [32].
The main presumed causes of neonatal death were BA (42.9%), prematurity (33.9%), and infection (12.5%), which is in line with current global data [5,9,10]. More than half of admitted newborns (50.9%) have a history of poor postnatal adaptation. These children were presented with moderate to severe encephalopathy at INSE indicating hypoxic brain injury. Contrary to our assumption, compromised neurological functions were not associated with neonatal mortality (Table 8). We argue that this discrepancy results from incomplete postnatal anamnestic information and the difficulty to fully assess BA in low-resource settings lacking techniques to analyze the umbilical blood for its acidosis, the newborn's blood markers for multiorgan dysfunction and brain imaging as well as cerebral function monitoring [33]. To facilitate diagnosis in developing countries and to prompt neonatal resuscitation interventions without delay, the WHO simply defines BA as "the failure to initiate and sustain breathing at birth" [34]. Initiating basic resuscitation measures providing stimulation, suctioning, and positive pressure ventilation is essential to reduce neonatal mortality in low-income countries [34]. Well performed neonatal CPR requires considerable knowledge, skills, equipment, and continuous training by the birth attendants [35]. Hence, developing feasible strategies to train and equip midwives and physicians for the fast recognition and effective management of BA in this setting is essential [36,37].
Prematurity as the primary diagnosis contributed to 33.9% of neonatal deaths, which is higher than prior Guinean and global studies reported and can be explained by the selection bias of transferred patients to the INSE, as the only structure caring for LBW and VLBW infants [9,10,38,39]. Premature newborns are highly susceptible to infections, quickly develop severe hypothermia, and often suffer from respiratory distress due to surfactant deficiency and lung immaturity [40,41] The main reasons for death in premature infants in a similar setting in Ethiopia were found to be respiratory distress syndrome, infections, and BA [42]. We confirmed in this study that the need for oxygen therapy doubled the risk of death as the outcome. In this report, the subgroup of premature newborns was not analyzed for specific morbidities and secondary causes of death. To improve preterm birth outcomes in lowresource settings, the WHO recommends measures such as antenatal corticosteroid therapy for women when preterm labor is imminent, antibiotics for women in preterm labor with preterm prelabor rupture of membranes, routine KMC for newborns weighing less than 2000 g or less, and CPAP therapy for the treatment of respiratory distress syndrome [43]. All these treatment approaches are not yet a standard in Guinea.
Neonatal infection was presumed very likely in 37.1% of cases with either clinical or laboratory aspects of sepsis. Two children had proven meningitis by gram staining of their cerebrospinal fluid. In 12.5% of cases, neonatal infection was the presumed main cause of death. Preventing vertical transmissions of infectious pathogens, ensuring clean birth environments [11], and limiting nosocomial infections [44] is critical in controlling neonatal infections. Implementing microbial laboratories analyzing blood and liquor cultures would greatly aid in the treatment of neonatal infections. The current antibiotic treatment regime at INSE using ampicillin and gentamycin empirically is appropriate according to WHO guidelines [45] and currently available evidence [46], however, its use is overrepresented. The unexpected finding that discontinued antibiotic use reduced the outcome of death by half may be explained by the overuse of antibiotic treatment in 98% of all admissions at the INSE. Therefore, the better outcome in patients with less use of antibiotics reflects probably the fact that these infants did not need antibiotic treatment at all.
Half of the deceased children (51.1%) weighed less than 2500 g. LBW is a major determinant of neonatal mortality [5] and accounts for 60-80% of all neonatal deaths worldwide [47]. LBW is caused by intrauterine growth restriction, premature birth [48], maternal infection, and malnutrition [49]. Identifying and implementing appropriate measures to reduce the causes of LBW should be a priority. Neonatal care units need to be equipped with fully functioning incubators to adequately care for LBW newborns, and KMC units should be increased in capacity and promoted to improve their perceived relevance and reduce early hospital discharge of LBW infants [50,51].

Perinatal care and access to postnatal care
This study indicates the dependence of favorable neonatal outcomes on the quality of antiand perinatal care. Poor general condition of newborns at admission was associated with a five-fold higher hazard of dying compared to those arriving in good condition. All of the admitted newborns at INSE were outborn due to the ongoing reconstruction of the associated maternity ward at Donka University Hospital. Several studies showed that general mortality in neonatal care units caring for outborn and inborn neonates was higher [52,53] than studies that only included inborn newborns [54,55]. No study so far analyzed a purely outborn population. Dramatically high with 7.5%, in particular for an urban area, is the rate of children born at home in the absence of any skilled birth attendants. Skilled attendance at birth is inversely related to neonatal mortality [5] and should be a fundamental right for any delivery worldwide. Most of the prenatal history was unknown to the treating physicians at INSE either because mothers did not have the four recommended antenatal care visits (67.9%) or because there was a lack of documentation in the maternal medical history reflecting poor prenatal health services in Guinea. Comprehensive antenatal care has consistently been confirmed to reduce neonatal mortality [56][57][58]. Improvement in transfer data is an important claim of this study.
One further elusive aspect of this study is the question of how many families refrained from presenting their newborns either because the hospital was too far away from their home/place of birth or they did not have the financial means to cover transportation and hospitalization costs. A descriptive study conducted in Pakistan analyzed the determinants for low utilization of postnatal care and found that, aside from low level of education, lacking awareness, facing transportation issues, and unaffordable cost of healthcare were the most important factors for neglecting postnatal care [59].
Of those admitted at INSE, only 2.3% of children arrived by ambulance, which is half of the previously reported rate from INSE in 2015 [15]. Even in ambulances, respiratory support with oxygen is not available. Therefore, all neonates were transported without placement in incubators for maintaining temperature or surveillance of ongoing treatment by a medical professional. More than one-third of newborns were hypothermic at admission. Without heat loss protection during neonatal transport, a loss of body temperature was shown to be as high as 0.1 to 0.3˚C per minute [60]. Our data show a twofold higher hazard of dying among hypothermic newborns at admission. Siqueira and colleagues also showed that hypothermia at admission was significantly associated with early neonatal death even in the presence of highquality neonatal care [61].

Quality of care
Although the only NICU in Guinea, the infrastructure and equipment at INSE are insufficient, which diminishes the in-hospital quality of care substantially. Our surrogates of quality of care showed deficiencies in the availability of necessary diagnostic and treatment equipment and usage of existing resources. Lacking essential diagnostic tools coerced healthcare workers into using non-recommended treatment strategies, such as antibiotic treatment for every admitted newborn due to lack of a microbiological laboratory [62,63]. Almost half of the critically anemic newborns were not given blood transfusions or with a major delay, due to blood collection at the blood bank by the parents themselves.
More than half of hypothermic newborns at admission were not externally heated, and more than one-third of newborns developed hypothermia during their hospitalization. Only one-third of premature newborns were transferred to KMC with their mothers after stabilization in the NICU. These are unfortunate findings since efforts to limit heat loss are important initial steps in the postnatal stabilization of newborns. Extended periods of cold stress have been associated with morbidities, such as respiratory distress [64] and late-onset sepsis [65], as well as death [66], especially in preterm infants and must therefore be prevented rigorously. Often, the only existing bed with overhead heaters at INSE was occupied by other children or inoperable because of power outages. Given these circumstances, local health workers have to adapt and ensure continuous thermal care using alternative strategies, such as skin-to-skin care [67] or placing infants inside plastic bags or aluminum paper [68]. Half of all admitted newborns suffered from respiratory distress underlining the importance of respiratory support and oxygen supply at INSE. Yet, oxygen was not supplied to all children in need, usually, because there were no more available Y-pieces to connect the newborns to the oxygen concentrators. These examples demonstrate that even the theoretically available, but quantitatively underequipped basic resources could not be used to their fullest potential either because the number of children in need exceeded the existing capacity or because their usage was impeded by external factors, such as electric blackouts.
Proof of poor quality of care at INSE and the large chasm between existing and necessary infrastructure to allow for fast and efficient reduction of neonatal mortality illustrate the complexity of challenges that low-income countries are facing in their urge to advance healthcare and reduce mortality. Under resource-deprived circumstances, the financial means typically do not allow for generally recommended strategies to be applied, and locally-customized feasible interventions are required.

Implications and proposed solutions
These findings show that the current situation for newborns in Guinea is dire and that targeted interventions are urgently needed to achieve the SDG 3.2 of reducing neonatal mortality. Jones et al. proclaim that the majority of child deaths could be prevented by interventions that are feasible for implementation in low-income countries at high levels of population coverage, such as clean delivery, breastfeeding, and antibiotics for sepsis [69]. The high mortality rate of preterm newborns could be diminished by ensuring comprehensive antenatal care, skilled intrapartum assistance, and immediate postnatal care to guarantee appropriate temperature management and nutrition [31]. Birth outside of a neonatal care center with the need to be transferred might have been disadvantageous for newborns in this study. Therefore, conjoining obstetric and neonatal care to allow for emergency delivery where indicated, optimizing immediate postnatal resuscitation maneuvers, and offering timely postnatal interventions, such as antibiotic treatment and maintaining body heat, is crucial [70]. Health services, especially midwifery, must be strengthened to screen for high-risk cases, as identification of fetuses at risk will diminish perinatal complications and reduce neonatal mortality [71]. Furthermore, transfer documents with basic information about maternal health, delivery process and neonatal adaptation are fundamental for the receiving neonatal unit.
It is of utmost importance to facilitate access to INSE by reopening the in-house maternity ward at the Donka University Hospital as soon as possible to bring high-risk deliveries in close to uninterrupted neonatal care at the NICU. The capacities of rooms and beds at the NICU have to be increased, equipment quantitatively and qualitatively to be improved, and a network of medically staffed ambulances equipped with basic devices for neonatal care has to be established.
Easy-to-apply and low-cost interventions like skin-to-skin contact, i.e. KMC, have to be promoted and should be provided to every preterm infant for being highly beneficial and welltolerated even by critically ill newborns [50]. The recruitment of trained manpower [72], better education [73], supply, support, and supervision [74] for health workers, in particular nurses and midwives, have been shown to be essential in reducing neonatal mortality [75].
This study aims to document the extent of newborn death at the only NICU in Guinea and to galvanize national policy decision-makers, public health experts, and other key stakeholders in the country to realize the pressing need for immediate action in order to reduce neonatal mortality.

Limitations and future research
Several limitations necessitate cautious interpretation of the results of this study. It was conducted in a single center in the largest urban agglomeration in Guinea. The sample size was small due to the restricted observation period of only one month, which limits the confidence in our findings. All admitted newborns were pre-selected in their severity of disease by being born outside of INSE and only presented in case of relevant symptoms, therefore leading to not negligible selection bias and a non-restricted catchment area. The challenges to accurately diagnose diseases without constantly available and reliable laboratory results were substantial. Treatment options were often not accessible or of inferior quality, and depended largely on the parents' monetary situation. Additionally, the quality of medical documentation was poor with several untraceable patient histories and insufficiently completed medical forms. Despite these limitations, we believe that our study provides highly relevant information regarding factors for neonatal death in Guinea, especially considering the recentness of data. The results of this study were not aimed at accurately depicting the national epidemiology of neonatal mortality in Guinea. However, as the INSE represents the arrowhead of neonatal medicine in Guinea, this study in the potentially best equipped and staffed neonatal unit unveils a tremendous lack of the Guinean healthcare system regarding perinatal medicine. Future research projects should be designed, but more financial support will be needed to conduct scientifically more robust studies.

Conclusions
Mortality was shown to be unacceptably high among newborns admitted to the only NICU in Guinea with BA, prematurity, and infection as the main pathways leading to death. Proof of poor quality of in-hospital care accentuates the difficulty to advance healthcare under resource-deprived circumstances. To reduce newborn mortality in this low-resource setting, the priorities should be i) defining strategies to identify fetuses at risk, ii) conjoining obstetric and neonatal care to offer timely postnatal interventions, and iii) improving the resources on all levels, i.e., training of health care professionals, the equipment for diagnostic and treatment aspects as well as the patient documentation system. Additional larger studies are needed to substantiate the findings, facilitate targeted interventions, and give leverage to national health administrators claiming more funding. The situation for neonates in Guinea is nothing short of a human tragedy and if no immediate action is taken more newborns will lose their lives to easily treatable diseases.
Supporting information S1 Dataset. Dataset as collected from the patient medical records (with maternal age, HIV status, birth weight, and coordinates of birth places removed to protect patients' identities) and translated from French to English. (PDF)