{'fraction_non_alphanumeric': 0.03566720942854928, 'fraction_numerical': 0.021607092088599417, 'mean_word_length': 5.407021029971849, 'pattern_counts': {'":': 0, '<': 2, '<?xml version=': 0, '>': 2, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Models of care for non-communicable diseases for displaced populations in Iraq: a scoping review

Non-communicable diseases (NCDs) are the leading cause of death and disability globally. Their importance in humanitarian settings is increasingly recognised, but evidence about how best to address NCDs in these setting is limited. This scoping review aimed to explore models of NCD care for displaced populations in Iraq, in order to build evidence to design context adapted models of care. A search of key databases (Medline, Embase, Scopus, EconLit, Global Health, Web of Science, and the Iraqi Academic Scientific Journals) was conducted and complemented with grey literature and snowballing searches. Documents were included if they referred to models of NCD care for displaced populations. We synthesised the data using a conceptual model of care framework. The findings were reported according to the PRISMA guidelines for scoping reviews. We identified 4036 documents of which 22 were eligible for inclusion. Only six documents were peer-reviewed studies with most being internal reports, commentaries, or press releases. Of the 14 documents that reported on their methods, most applied quantitative approaches (n = 7), followed by mixed-methods (n = 5) and qualitative approaches (n = 2). Only one document reported on outcome data and none applied longitudinal study designs. Documents generally described individual framework dimensions, mostly centring around medicines, facility-based services, and selected access dimensions. Most dimensions had few or no references. The most common model for displaced populations in Iraq was primary-level centred care that complemented or supported existing—mostly tertiary—public health system structures. Additionally, private facilities played an important role and were frequently accessed by displaced populations in most settings. Quality of care, particularly patient-perceived quality, emerged as a critical factor for designing context-adapted models of NCD care. This review also identified a strong regionality of NCD care, particularly in terms of access rates and barriers. We concluded that there is a scarcity of evidence on the effectiveness of models of NCD care for displaced populations in Iraq, calling for capacity building initiatives focused on implementation research and evaluation.

This transition is driven by an advancing epidemiological transition in low-income countries and by middleincome settings being affected by humanitarian crises, particularly since the Balkan and Caucasus wars in the 1990s [5].
Humanitarian actors are increasingly acknowledging the need to address the chronic care needs of people living with NCDs in their programming, which historically evolved to provide acute, episodic care [5][6][7][8]. Major gaps in the NCD care provision by humanitarian actors were highlighted in the last decade [9,10]. Progress has been achieved on many of these including the integration of NCDs into the Inter-Agency Emergency Health Kit and the publication of multiple important reviews around NCDs in humanitarian settings [7,[11][12][13][14][15]. Despite the increasing attention and research, uncertainties of (cost-) effective models of care remain due to limited evidence of impact and quality of research publications [7].
This review contributes to a research programmeanchored within the "Partnering for Change" partnership-aiming to address the knowledge gap around cost-effective models of care for NCDs in humanitarian settings globally, with case studies in Iraq and Lebanon. This review's focus is limited to Iraq. Iraq is an upper-middle-income country with substantial internal displacement, a population affected by protracted and recurring conflict and an advanced epidemiological transition [16][17][18][19]. NCDs accounted for 65% of the burden of disease in 2019 and have been included in its national care package since 2009 [20,21]. Despite the national public health system's resilience and historic strength, decades of armed conflicts, economic crises, and weak governance have severely impacted its capacity [17,22,23]. Care delivery is situated in a complex context of power relationships with governments in central Iraq and in the northern semi-autonomous Kurdistan Region of Iraq (KRI). Next to national actors, the healthcare system is made up of prominent international development and humanitarian actors and a strong, but largely unregulated, private sector [23].

Methods
This scoping review aims to explore models of care for NCDs for displaced populations in Iraq. This review was guided by a model of care conceptual framework that was developed for the overarching research programme to improve comparability across settings (see Fig. 1).
We used scoping review methodology to map existing evidence and identify research gaps, applying the adapted PRISMA standards (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) for scoping reviews [24,25]. This method was appropriate considering the review's broad research aim [26].

Model of care framework
The model of care framework (see Fig. 1) was developed for the overarching study to assist with data analysis and reporting of heterogeneous models across diverse settings. We considered a model of care as the "overarching design for the provision of a particular type of health care service" [27].
The framework was based on an adapted version of the World Health Organization (WHO) health building blocks framework and existing models of care [28]. These included the components of high-quality health systems, a model of NCD care framework for low-and middleincome countries (LMICs), economic models and social system approaches to describing a healthcare system, and access to care concepts [29][30][31][32][33][34]. Adaptations intended to address earlier criticisms of overly mechanistic blocks and to better capture 'patient-centredness' . A description of the specific conceptual framework dimensions was provided in the original publication [7]. This model of care framework was used to inform and guide data extraction and analysis.

Data collection process
The PICO(S) tool (see Table 1) depicts the review's eligibility criteria. The disease focus-on diabetes mellitus (DM), hypertension (HTN), and cardiovascular disease (CVD)-was based on local disease burden and global relevance, previous author recommendations, and the feasibility of addressing these diseases jointly and at a primary level [7,35,36]. The search focused on displaced populations, both internally displaced populations (IDPs) and refugees, to capture adaptations made to cater for populations affected by humanitarian crises. Keywords included both conflict-and disaster-caused displacement based on an initial review of the EM-DAT disaster database [37]. We included care provided through the country's public and private formal healthcare systems, and through 'parallel' systems provided by humanitarian actors, such as those providing complimentary service and those integrating with existing structures. Documents were included if they described a humanitarian actor's models of care even if they did not specify a focus on displaced populations. Documents with data about people living with NCDs as a subgroup were only included if the data were stratified or the overall arguments applied to the whole group under study. If the same data were available across multiple resources, the newer source was used and other documents were excluded.
The three-stage data collection process included database, grey literature, and snowballing searches. Seven databases (OVID MEDLINE, OVID EMBASE, Web of Schmid et al. Conflict and Health (2022) 16:40 Fig. 1 Conceptual framework for a model of care for NCDs in humanitarian crises [7] [13,15]. A full list of platforms and organizational websites that were checked was added in ANNEX A. The search keywords and approach were adapted according to each platform's search functions. An example search is provided in ANNEX B.

Study selection and data extraction
The citations from the search results were imported into EndNote X9 desktop [38]. After the removal of duplicates, the document's title and abstract were scanned for inclusion. The remaining documents were full-text scanned for final inclusion. All scans were guided by the criteria in Table 1. The full-text scan was conducted by at least two authors for each document (BS and RW or NS) and disagreements were moderated by a third author (EA). Exclusion reasons are provided below (see Fig. 2). The data were extracted by the first author for each framework domain and dimension separately, using an Excel-based tool, and the results presented using the same structure. Additional contextual data was plotted, including for example the type of humanitarian setting, study population, research methods or study characteristics. A dimension was considered to be addressed if related data was provided, implications were discussed, recommendations given or challenges described. There was no specific process of obtaining or confirming data from included documents' authors.

Study selection
The literature search yielded 4036 citations in total, of which 22 were eligible for data extraction. The commonest reasons for full-text exclusions were that documents did not focus on or stratify data for displaced populations (n = 67) or the included NCDs (n = 62). A flowchart of the literature search and scan is provided below (see Fig. 2). For the grey literature and snowballing search, title-abstract scans were done prior to duplication removal due to the limitations of the search platforms. The depth of data was minimal and documents were included even with scant references to models of NCD care for displaced populations.

Study characteristics
Characteristics of the 22 included documents are described below (Table 2) and a summary of each document is provided in Table 3. Most of the included documents were not peer-reviewed and were thus considered grey literature (73%, n = 16). The majority of those were internal reports by humanitarian organizations. Around 20% of the included documents were press releases or commentaries. Only 14 of the 22 (63%) included documents reported on their methodology, which included five peer-reviewed studies and nine grey literature reports. Of these 14 documents most applied a cross-sectional design using quantitative surveys. Five combined survey data with qualitative interviews or focus groups, and two documents used qualitative methods only. All but one (an internal report that reported on process and patientreported outcomes) were descriptive [39]. No documents provided clinical outcomes such as blood pressure control, complications, or mortality. Further details on the distribution of the included documents' characteristics can be found in Table 2.

Data synthesis
Results are presented according to the conceptual framework domains and dimensions. To consider the importance of contextual factors, results were stratified based on geographical location as well as service provider, comparing camp-to community-based settings, where available [7]. Due to the general scarcity and limited depth of available data, with most documents being internal reports or press releases, we included items with minimal references to models of NCD care.
Most documents described individual framework dimensions. The most frequently addressed dimensions were accessibility (77%, n = 17), availability (68%, n = 15), and facility-based services (64%, n = 14). Evidence mostly centred around the traditional health system building blocks or selected access dimensions. The contextual dimension of sociocultural environment was addressed by 77% (n = 17) of documents, and that of broader public and humanitarian policy by 14% (n = 3) of documents. All but three conceptual framework dimensions, financing and governance, safety and education, were addressed by at least one document. A detailed overview of the addressed dimensions is available in ANNEX C.
Under the information dimension, no documents detailed the use of health information systems. The only reference to a health information system was from a press release referring to medical files existing at MSF campbased facilities [47]. Similarly, there were references to 'basic patient education' as part of MSF's mobile clinics model of care, while no specific descriptions of their content or approaches were outlined [48]. One author called for patient education focused on healthy eating and patient responsibility, in response to complications being observed in DM patients on medications [46].
Virtually no papers collected outcome data with the only exception being an internal evaluation report of a CARE project with an NCD component, next to maternal health services, at a DoH-run PHCC in Zummar district [39]. The project reported on process and patientreported outcomes. The project's NCD model of care was built around the provision of essential medicines and laboratory supplies, the extension of its opening hours and the presence of a specialist during afternoon hours. The process indicators included staff perception of the supply rate and quality of medicines (92% reporting "very good"), the implementation of a supply chain and medicines needs assessment, and increased patient numbers in the afternoon shift. The patient-reported indicators found that the PHCC provided care was of overall high or acceptable quality (81%), that the provided services were "highly needed" by the community (81%, n = 461), and that access to specialised services increased from 45 to 92% from baseline. More than 90% of patients also reported being satisfied with the behaviour of the staff and confident in their knowledge and skills. The report did not detail the number of key informant interviews (including staff ) or the total number of respondents. Other documents provided anecdotal evidence of improved access [54]. Three cross-sectional studies provided insights into intermediate health outcomes, focusing on treatment adherence levels. They reported varying levels, ranging from 5 to 70% self-reported adherence [40,55]. Adherence was significantly lower for hospital patients compared to camp PHCCs in one study and associated with perceived, rather than diagnosed, NCDs in another report [40,56].

Intermediate outcomes
Across the dimensions of the quality domain, few dimensions were addressed, often with little detail provided. A common theme was integration and continuity, such as referral pathways or follow-up processes. They were mainly covered by commentaries or under recommendations, while no document provided insights into their consistency or success. References to the existence of referral pathways for complicated or specialised cases were made in some settings [39,45,50,52,53]. One report detailed that most patients were referred to other non-governmental organizations (NGOs; 71%) rather than governmental facilities (29%) [39]. Two documents noted referral gaps, particularly for patients with NCD complications in the KRI and because of the interruption caused by the need for special referral documents in Al-Anbar in 2018 [40,53]. Follow-up processes equally lacked detailed descriptions. Basic follow-up was reported to be part of MSF's mobile unit model and generally also available at public hospitals for camp-based refugees across the KRI [48,55]. In another camp-based setting, an imminent governmental camp-closure threatened continuity, as it did not allow for medical files and a 3-month medicines stock to be prepared [47]. Authors agreed that most international actors generally provided NCD services to fill specific gaps, thus working complementarily to the public healthcare system or providing technical support to the Directorate of Health [40,45,49,50,57].
Patient experience (i.e. acceptability in quality dimensions) was focused on the role of preferred branded medicines and mistrust in Iraq's public health system [52,55]. Data about the quantity of care was limited to pointing to a high workload of healthcare professionals, thus lacking consultation time for patient education [49,50,52]. In one setting, a camp-based PHCC reportedly saw 300 patients per day [50]. Clinical quality was only described by one document, mentioning the WHO and health cluster partners' support to the Directorate of Health for training health professionals [50]. One document called for the training of primary care physicians to care for uncomplicated NCDs [40]. In the responsiveness dimension, authors commented on the issue of varying opening times, the limited space in mobile clinics as well as the potential of cash-based assistance for increasing engagement [45,46,49].
Access and coverage was the most frequently and indepth discussed domain in this review, mostly centring around accessibility, availability and affordability. The accessibility of NCD care (self-reported as having no difficulty in accessing services or medicines), according to population or household access surveys of IDPs, refugees and NGO beneficiaries, varied widely from < 10 to > 90% in some settings [52,[55][56][57][58]. Studies used diverse access measures, including having seen a health professional in the last 3 months [40], absence of self-reported access barriers or difficulties [43,52,55,56,58], or unspecified variables [57]. Refugees residing in camps generally reported good access rates [55,56]. Reduced access rates were attributed to the greater distance to the nearest city, thus requiring transport, as well as overcrowding and scale of operations, such as generally fewer services being provided in transit camps [41,42,45,52,54,55,[57][58][59]. Access was reportedly differing between the type of facility with the best access reported to campbased clinics, rather than private or public facilities, for which the worse access rates were noted [43,44,55,56]. While PHCCs generally seemed accessible, in some settings many patients still required transport to reach them [39,60]. Some documents stratified access rates for specific population groups, noting displaced people living with disabilities or elderly being particularly vulnerable [39,47,52,58]. Access generally dropped during periods of active conflict, influxes of displaced populations and COVID-19 related restrictions [43,51,58,59]. In some settings specific access barriers were reported, such as requirement for referral permits, lack of knowledge about free-of-charge public sector care, or a lack of access to healthy food options [45,53,54].
Availability and affordability focused almost exclusively on medicines, with most data from household surveys and some research studies. Medicine availability was described as an issue in some settings, and, where data was provided, the reported non-availability ranged widely from < 2 to 45% [44,45,50,53,55,57]. While all availability surveys used patient-reported data, their indicators varied. Studies with Syrian refugees used either the presence of medicines at facilities or a persons' ability to obtain medicines. Two other studies using the same sample reported on medicine availability as a barrier for a patient to take their medicines [40,41]. They did not find availability differences across facility types [40]. During periods of active conflict, such as in ISIS-occupied Mosul, patient interviews captured a switch from careseeking in public to private facilities, mostly driven by a more rapid deterioration of medicine availability in the former [43]. In public facilities, insulin prescriptions were reduced to 10-days-a-time. Medicine availability and affordability were intimately connected, as the unavailability of medicines in the public sector frequently forced patients to purchase their medicines elsewhere, often decreasing affordability. Affordability of medicines was a common barrier for camp-based respondents (57-85%) [40,44,52]. In one report on displaced persons living in camps, people living with NCDs reported access barriers twice as frequently as the overall sample [55]. Affordability was frequently mentioned as a key barrier (> 80%) in settings where their availability was high [40,52]. During periods of unaffordability or unavailability of medicines, people reverted to-often unsustainable-coping mechanisms such as rationing their medicines, use of herbal medicines, or selling of personal belongings to fund medicine purchase [41,43,46].
Next to medicines, documents addressed affordability and availability dimensions for healthcare services and equipment. Documents noted that services-as well as medicines-were officially free of charge for displaced persons in all public facilities and some camp-based clinics [47,55,59]. One document reported that camp-based PHCCs had the lowest, though still present, associated average cost of care (1.6 USD), compared to the public (4.4 USD) and private (17.3 USD) clinics [41]. Apart from service costs, transport costs were often reported as unaffordable thus creating a major access barrier, particularly for people living in remote camps [41,45,52,54,58]. Some authors noted availability issues for equipment or affordability issues for laboratory or services [41,42,45,50,52]. In some locations, such as Sinjar district in 2020, public health facilities were virtually unavailable with 90% of towns and villages facing a lack of health centres [57].
Access concerns around accommodation and acceptability were infrequent and referred to diverse factors. In relation to medicines availability above, documents observed that self-reported access barriers were frequent even in settings (e.g. camp-based PHCCs) where medicines shortages were rare and services and medicines were generally provided free-of-charge [44,59]. Alternative explanations may be the perceived unaffordability of care [52], private-sector care seeking [43,59], lack of knowledge about service availability or them being freeof-charge [45] or preferences of brand medicines [43]. Some studies mentioned a lack of (locally available, suitable or appropriate) human resources, such as a lack of specialists or female care providers in camps [41,45,52,53]. Other mentions of accommodation included physical or language barriers or a mismatch between health counselling content and people's abilities to follow them [43,52,54,55] and limited opening hours or long waiting times [41,59]. Three studies captured, though very infrequently, issues of staff rudeness or being refused treatment by the health professional [40,43,44]. Only one study reported on the patient perceptions of care, noting that 99% of 'beneficiaries' were satisfied or very satisfied with the staff behaviour [39].

Patient demands and preferences
For the patient demand and preferences domain (cost and income, knowledge, education, household or cultural characteristics, and distance to service) various factors were touched upon. A cross-sectional survey found that camp households with one or more members with an NCD spent, at the KRI level, 60% more on medical expenses (40,000 IQD/last month) than those without [55]. An influence of wealth on access to care was broadly mentioned by two studies [40,43]. One document reported that families without income used private sector facilities less frequently (75% of families) compared with those with income (100%) [56]. One source reported that of their sample of 1216 IDP families in various provinces, more than 80% had some income, mainly through gifts, remittances and local charities [60]. In Al-Anbar province, 87% of 355 surveyed IDPs had fixed or temporary income [42]. Lower-income or employment levels were observed for elderly people, women and people living with disabilities [52,58,60]. For example, one report noted employment rates of people living with a disability dropping from 94 (n = 979) to 39% because of displacement [52]. The same report highlighted however the role of the family in facilitating access to care [52]. Other themes that were mentioned were frequent overcrowding for displaced populations living in camp shelters [46,60] and the access to healthcare being worse for those living far from the public health system [41,54,55,57].

Socio-cultural, policy and health system context
Many documents focused on the geographical differences in humanitarian responses as well as noting challenging economic circumstances, both for the whole of Iraq and particularly for displaced families. Most IDPs in Iraq are living in the host community (92%) rather than camps-based housing and most are hosted in central Iraq (68%) rather than the KRI (28%), which has seen greater international support due to improved security [56,60]. Contextual descriptions frequently noted a shift in KRI's initial open-access policy to more restrictive regulations due to a lack of international support [42,52,56,59,60]. Effects of economic stressors and reduced public health system financing were reportedly forcing displaced families to move to camps while health professionals were likely to increase their private sector work due to salary delays and reductions [40-42, 44, 60]. Economic impacts seemed to have worsened during the onset of the COVID pandemic [58]. Two documents described changes in October 2020, with an agreement on the Sinjar district being reached and a process of camp closures being initiated [47,57].
A common theme in this domain was the care-seeking patterns of displaced populations. Most patients sought NCD care in the public healthcare system, both for those residing inside and outside of camps [40-42, 45, 56, 59]. However wide inter-governorate differences were observed [56]. Alongside this trend, there was consistent reporting of families seeking care from private facilities, sometimes as the main access points or where most patients obtained their medicines [40][41][42]45]. This may be related both to medicine availability and to mistrust in the public system, particularly by Syrian refugees [52,55,56,60]. Trust in the public system may also depend on the specific NCD, as one study reported different utilisation rates per NCD diagnosis [40]. Private sector careseeking increased during periods of active conflict, often linked to issues of medicines availability in the public sector [43]. Care seeking was also seen to be influenced by communities' perceptions and misconceptions of NCDs, such as NCDs being untreatable [40,41,44,46,56].
Contextual descriptions also highlighted the severe impact of periods of armed conflict in its impacts on living situations, health system capacities and the prevalence of brutality and abuse, particularly against religious minorities [40,41,43,53,60]. Active conflict further aggravated people's stress and often led to a downprioritization of health concerns [40,42,43,53]. Two documents highlighted specific challenges for Yazidi communities, including language barriers and targeted violence [40,57].

Discussion
This review assessed the currently available evidence on models of NCD care for displaced populations in Iraq. It adds to global reviews through exploring models of care in Iraq as a single country, allowing broader inclusion criteria and contextualisation [7,14,15,61].
We observed an increase in the volume of publications and documents on NCD models of care for displaced populations in Iraq since 2015, while the depth of evidence varied across settings and framework dimensions. This review showed an increasing number of documents with 77% of those included having been published since 2015. However, the large majority were non-peerreviewed studies which may be due to the challenges and low priority of conducting research in humanitarian settings [62], as well as limited locally produced research in Iraq, due to lack of support and funding, and shortage of experienced and skilled researchers [63,64]. Peerreviewed studies generally used cross-sectional study designs, with no longitudinal studies, which are usually recognised as more robust [62]. Similar gaps in highquality evidence were identified globally [7]. Contrary to previous global reviews, most included documents in this review addressed NCDs in general rather than specific NCDs, which may be due to the prevalence of reports and press releases. Documents generally addressed only individual framework dimensions, with most focusing on traditional health system building blocks of facilitybased services and medicines. Intermediate outcomes centred around accessibility, availability, and affordability, while the quality of care dimensions and patient demand and preferences were addressed only by around 10% of the papers on average. A few dimensions were not addressed by any document, such as financing and governance, safety, knowledge and education dimensions. All documents focused on conflict-affected communities, rather than those impacted by disasters or their synergic impacts. Evidence identified in this review was also skewed towards the KRI (55% of documents) and campbased populations (45% of documents). This contrasts with most IDPs residing in central Iraq (68%) rather than the KRI in 2016 and outside of camps (92%). This may be due to the centricity of humanitarian response operations in stable areas and with accessible populations [56,60]. Other groups, such as refugees residing in urban host communities, have often been neglected and have not yet been studied specifically in Iraq [65].
We did not find strong evidence regarding the effectiveness of NCDs models of care for displaced populations in Iraq. The most frequently described model of care was a joint response by camp-based or parallel structures and the formal national healthcare system. Camps typically provided NGO-run PHCC care services, while sometimes including basic referral structures to the public healthcare system. This complementary approach has been called for previously, is appropriate in Iraq's context and may support sustainability [35]. In this review, we have also observed that integration between these services is non-standardized and often insufficient, which does not mirror the patients' frequent movement across sectors and facilities. References to diverse implementing actors in this review suggest that there is a range of existing experience of implementing NCD care for displaced populations in Iraq, but little is known about outcomes or effectiveness. To address this, there is a need for routine data collection and implementation research. In other settings, increasing evidence is being generated about the usefulness of approaches including peer-support groups, standardization of protocols, digital cohort monitoring and task-shifting, but we did not identify any evidence of these in this review [30,35,48,[66][67][68][69][70][71][72]. Evidence on NCD patients in Iraq's host population noted the usefulness and acceptability of single-dose combinations, health education sessions, and m-Health interventions, whose applicability should also be explored for displaced populations [73][74][75]. The review identified no reports about NCD prevention activities, despite it being a specific objective in Iraq's national development plan 2018-2022 and feasible in humanitarian settings and post-conflict countries [35,76,77]. However, patient education has not systematically been implemented for refugee populations in the region more broadly [72]. While prevention-focused components may be feasible, the limited consultation times, as well as social and cultural aspects, need to be taken into consideration [49,52,78].
Access to NCD care varied widely within Iraq and the type of access barriers were highly contextual. Access was the main theme in the included documents, mostly centred around availability, accessibility and affordability with fewer documents addressing acceptability or accommodation. Access was a key issue across most settings that were described. However, in this review, vastly different access rates were observed across governorates and time, similar to what has been described by actors implementing NCD care in the Syria crisis [79]. Limitations to access had varied reasons such as insecurity in most of Iraq's districts in 2010 [51], due to non-functioning facilities and lack of staff in Sinjar in 2020 [57], an influx of refugees or returnees [58,59], distance to the nearest city [52,55], or because of COVID-19 lockdowns in 2020 [58]. These results suggest that even within one country the degree of access or reasons for a lack thereof vary widely, requiring contextual knowledge on local circumstances when designing an appropriate model of NCD care. This review thus reiterates earlier calls to take the regionality of crises into account [35,79,80]. Specific access dimensions were often centred around access to medicines, which was reportedly worse in public facilities compared to parallel camp-based PHCCs or private facilities. Where medicine availability was a major barrier it was one of the top priorities to improve NCD care, as has been observed in models of care in sub-Saharan Africa and a case study in Mali [30,81]. This review has also shown the impact of ongoing or recent conflict on access rates, with many people forced to change or limit their health seeking or care. Depending on the context, minorities were at even greater risk within an already vulnerable population. These impacts reiterate the critical role of the stage of a humanitarian crisis in decisions on potential NCD models of care and their feasibility [35].
Patients' perception and trust in the health system shape care-seeking patterns. Across camp-and host community-based displaced populations, most people sought care from the national healthcare system-mostly from higher-level facilities or private facilities [41][42][43]56]. This pattern may be shaped by the health system's historic centricity around tertiary-level care and its influence on the perceived quality of care [82]. Nonetheless, primary care facilities-mostly focused on camp-based facilities-remained a critical provider for a large proportion of people across settings. They played a critical role in ensuring equitable access to care, with being more accessible and affordable than any other facility type. This role of the primary sector, as well as high patient satisfaction, was observed previously in a national household survey in Iraq [83]. Primary care should be at the centre of the NCD health system response, yet no evidence has emerged in this review on how decentralisation could be achieved, particularly while addressing patients' trust and their perception of quality [35,84]. Patients commonly used private sector facilities complementarily or as their main access point. The reasons for private-sector care-seeking varied but centred around the perceived quality of care or lack of choice. A commonly cited reason was the availability of medicines, including specific brands [43,52,55]. When not available, such as during periods of armed conflicts where public facilities faced greater shortages, patients were forced to purchase them at private pharmacies [43]. Other authors highlighted the key role of medicines and health workers availability as reasons [85]. However, patients continued to seek private-sector care even where medicines availability in the public sector was improved and despite additional affordability barriers (e.g., transport costs, service fees) [41]. In this review, the mistrust towards Iraq's public healthcare system was proposed as a potential reason, particularly by Syrian refugees. Similar patterns on preferences and trust were captured for Syrian refugees in Jordan and Lebanon [72]. Iraq's largely unregulated private sector and its dual-practice system may further play a role [86,87]. Income levels seemed to have some impact on private-sector care-seeking, while even families without income commonly accessed private care in one setting [56]. This observation suggests that people may take additional barriers into account to access their preferred care. These patterns reiterate the criticality of developing patient-centric models of care and addressing issues of patient trust and perceived quality, for example through continuous quality assessments at primary level care [88].

Strengths and limitations
The diverse inclusion criteria, including qualitative and quantitative methods and grey literature documents, allowed a greater depth of insights. Following PRISMA guidelines for scoping reviews, we did not conduct a formal quality appraisal and the included documents may thus be of varying quality and rigour. The grey literature was sought from internationally recognised humanitarian organisations providing some level of quality control. The authors attempted to counteract the varying type of publications and depth of provided data by giving detailed descriptions of each study's characteristics. Due to the heterogeneity of the included publications, no meta-analysis could be conducted. The fact that the inclusion criteria were limited to materials published in English may have led to the exclusion of potentially relevant papers in Arabic, Kurdish, or other languages. Our study team includes a senior author with substantial experience and knowledge of the national setting, who has guided scoping and data interpretation.

Conclusions
This review aimed to explore models of NCD care for displaced populations in Iraq. This review concluded that (i) there is a lack of evidence on the effectiveness of NCDs models of care for displaced populations in Iraq, (ii) access rates and barriers are highly contextualised and vary across time, location, and the crisis phases, (iii) primary level NCD care is critical for equitable access, while private sector providers' contributions play a role even during the worst humanitarian crises, (iv) patients' perception of care should be a core consideration when designing a model of NCD care. To address the identified gaps, we recommend the strengthening of implementation research and evaluation capacities of humanitarian and academic actors in Iraq to harness existing experiences of implementing models of NCD care. Future research may focus on the effectiveness of NCD models of care with a particular focus on those that are patientcentric and address communities' perception of care, e.g. patient education, peer-support approaches, or treatment simplifications. Such efforts could build on the applied model of care framework which has proven a useful analysis and comparison tool in this review.