{'fraction_non_alphanumeric': 0.03541760800806368, 'fraction_numerical': 0.01744812484793716, 'mean_word_length': 5.1347547974413645, 'pattern_counts': {'":': 0, '<': 12, '<?xml version=': 0, '>': 5, 'https://': 0, 'lorem ipsum': 0, 'www.': 1, '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}}
Effects of a brief video intervention on treatment initiation and adherence among patients attending human immunodeficiency virus treatment clinics

Background Persons with human immunodeficiency virus (HIV) who get and keep a suppressed viral load are unlikely to transmit HIV. Simple, practical interventions to help achieve HIV viral suppression that are easy and inexpensive to administer in clinical settings are needed. We evaluated whether a brief video containing HIV-related health messages targeted to all patients in the waiting room improved treatment initiation, medication adherence, and retention in care. Methods and findings In a quasi-experimental trial all patients (N = 2,023) attending two HIV clinics from June 2016 to March 2017 were exposed to a theory-based, 29-minute video depicting persons overcoming barriers to starting treatment, taking medication as prescribed, and keeping medical appointments. New prescriptions at index visit, HIV viral load test results, and dates of return visits were collected through review of medical records for all patients during the 10 months that the video was shown. Those data were compared with the same variables collected for all patients (N = 1,979) visiting the clinics during the prior 10 months (August 2015 to May 2016). Among patients exposed to the video, there was an overall 10.4 percentage point increase in patients prescribed treatment (60.3% to 70.7%, p< 0.01). Additionally, there was an overall 6.0 percentage point improvement in viral suppression (56.7% to 62.7%, p< 0.01), however mixed results between sites was observed. There was not a significant change in rates of return visits (77.5% to 78.8%). A study limitation is that, due to the lack of randomization, the findings may be subject to bias and secular trends. Conclusions Showing a brief treatment-focused video in HIV clinic waiting rooms can be effective at improving treatment initiation and may help patients achieve viral suppression. This feasible, low resource-reliant video intervention may be appropriate for adoption by other clinics treating persons with HIV. Trial registration http://www.ClinicalTrials.gov (NCT03508310).


Introduction
Early initiation of antiretroviral therapy (ART) for patients infected with the human immunodeficiency virus (HIV) and subsequent lifelong viral suppression have important clinical and prevention benefits. [1,2] HIV treatment and prevention guidelines stress the importance of HIV testing, linking persons diagnosed with HIV infection to care programs, and initiation and maintenance of ART. [3][4][5] Despite these guidelines, a substantial number of persons with HIV (PWH) in the United States have not been engaged in HIV care services. Centers for Disease Control and Prevention (CDC) data from 2014 show that of the estimated 1.1 million PWH, 51% were not virally suppressed, [6] including an estimated 57% of black, 52% of Hispanic, and 43% of white PWH. Unsuppressed HIV infection, whether from lack of diagnosis, treatment, or medication adherence, is the most important factor contributing to HIV incidence, currently estimated at >35,000 new infections per year in the United States. [6] Although treatment initiation, medication adherence, and retention in care are key for controlling HIV infection from clinical and prevention perspectives, there are few evidence-based behavioral interventions to support these behaviors, especially among black and Hispanic PWH.
CDC's Compendium of Evidence-Based Interventions and Best Practices for HIV Prevention has identified 24 interventions with varying levels of efficacy for improving either medication adherence (N = 14) or retention in, linkage to, and re-engagement in HIV care (N = 11) among PWH. [7] Whether delivered to individuals or groups, these interventions all require multi-session attendance and relatively intensive organizational resources to implement. There is a clear need for simple adherence and retention interventions that can be sustained at relatively low cost and brought to scale quickly to achieve maximum patient coverage. [8] Two widely disseminated video-based interventions, VOICES/VOCES (V/V) and Safe in the City (SITC), were tested in sexually transmitted disease (STD) clinics and found to be cost-beneficial and effective in reducing STD incidence. [9][10][11][12][13][14] It is therefore reasonable to expect that a waiting room video having a similar format and user-informed development process as V/V and SITC [15] would have a positive effect on HIV-related health outcomes and be acceptable to both patients and clinic staff. The 25-minute V/V [11] and SITC [16] education-entertainment videos are available in English and Spanish, can be viewed in clinic waiting rooms or small group sessions, and comprise a set of intervention videos. Drawing on the successful model developed for this set of videos, we created Taking Care of Me (TCOM), an intervention video with supporting posters for use in HIV clinic waiting rooms. This paper describes its impact on treatment initiation, medication adherence, and retention in care. provided direct funding and support in the form of salaries for authors MSN, ADM, CBB and SAF, but did not have any additional role in the study design, data collection and analysis, decision to publish or preparation of the manuscript. The specific roles of these authors are articulated in the 'author contribution' section. The four authors who are employees of the Centers for Disease Control and Prevention had roles in study design, data collection and analyses, decision to publish, and preparation of the manuscript. Two authors are employees of the commercial company, Sentient Research (AP and JAM), and had roles in study design, data collection, and preparation of the manuscript. The specific roles of these authors are articulated in the 'author contribution' section.

Methods
We used a commercial institutional review board (IRB) because CDC was not involved in data collection and none of the study sites had an affiliated IRB. On April 6, 2016 the IRB approved the study with a waiver of informed consent since patients and providers would not be actively recruited or surveyed, and only routinely collected data from each clinic's EMR would be used (S1 Appendix). The intervention was registered as a clinical trial after data collection began because no participants were enrolled in the study.

Patients and sites
To be eligible for participation, HIV clinics had to be located in a community with high AIDS prevalence, use an electronic medical record (EMR) system, have a patient population that is >55% black or African American (hereafter referred to as black) and/or Hispanic or Latino, and agree not to participate in another behavioral intervention study during our study. Also, the clinic's population had to include >500 HIV-infected patients. Using these criteria, we selected one HIV clinic in Huntsville, AL, another in Atlanta, GA and an HIV case management center affiliated with an HIV clinic in Miami, FL. All patients visiting the clinics or center during the 20-month study period were included in the study.

Intervention
The TCOM video follows the V/V and SITC model of incorporating key prevention messages into dramatic soap-opera style content involving diverse characters. [16] Multiple script iterations were reviewed by agency administrators, front-line providers, and consultants who were PWH. TCOM's conceptual framework incorporates Social Cognitive Theory, Information-Motivation-Behavioral Skills model, and Social Action Theory, which together address cognitive and behavioral factors related to study outcomes. [10,11,13] Storylines embedded prevention messages aimed at increasing treatment initiation (n = 9), medication adherence (n = 35), retention in care (n = 22), partner protection (n = 12), and communication with health care providers (n = 7). The final script presented the prevention messages in dialog or visuals (e.g., taking medication with water instead of alcohol). The resulting 29-minute TCOM video includes three vignettes and a 2-part animation about main characters who model overcoming challenges to optimal HIV care. The video was played on continuous loop in recognition of typically short patient wait times. Waiting room posters used images from TCOM to direct patients' attention to the video and reinforce prevention messages.

Study design
TCOM is a variant of videos with demonstrated efficacy in randomized control trials; therefore, we opted for a more resource-and time-efficient method to test our addition to this set of videos. We used a quasi-experimental design, in which the intervention condition (i.e., TCOM and posters) was implemented for 10 months (June 1, 2016-March 31, 2017) and the historical comparison condition (i.e., standard waiting room environment) was the prior 10-month period (August 1, 2015-May 31, 2016). Funding for our study and difficulty in finding eligible HIV clinics precluded use of contemporaneous controls. No patients were recruited and enrolled in the study. Instead, routinely collected data were abstracted electronically from the clinic EMRs for all patients age 18 and older who attended the clinic during the historical comparison period (retrospective data collected June 2016) and during the intervention period (prospective data collected May 2017). Data were de-identified and included dates of index and subsequent outpatient ambulatory medical care (OAMC) visits, sex, gender identity, race, ethnicity, age at index visit, year of HIV diagnosis, date of first ART prescription at the clinic, risks for HIV infection, and HIV viral load laboratory test dates and results.

Outcome measures
The primary study outcome was ART medication adherence. Adherence was measured by whether viral load suppression (<200 RNA copies/mL) was achieved by 6 months (183 days) after the patient's index visit; undetectable viral load (<50 RNA copies/mL) also was assessed. Primary outcome data were lab test results in patient EMRs. The secondary study outcomes included treatment initiation and retention in HIV medical care. Treatment initiation was measured by a patient's receipt of an ART prescription on, before, or within 7 days after, their index visit, as documented by OAMC visits in patient EMRs. Retention in HIV care was measured by an adaptation of the Health Resources and Services Administration's (HRSA) definition in the Annual Ryan White HIV/AIDS Program Services Report (RSR): "all clients who have had at least 2 or more OAMC visits for any reason at least 90 days apart in the past year divided by all active clients who had had at least one such visit in the past year and are greater than 12 years of age." [17] HRSA's definition is restricted to a calendar year; therefore, for HRSA's calculations, the first OAMC visits in the year must have occurred in the first 8 months (by September 1) of the measurement year in order to give patients an opportunity to meet the retention criteria by year's end (December 31). However, funding for our study only allowed for a 10-month follow-up. To give patients time to meet retention criteria for our calculations, their first OAMC visit must have occurred in the first 6 months of the study condition period. Our adapted formula comprised patients who came back after 90 days divided by all patients who came in between 1-183 days.

Statistical analyses
Simplified sample size calculations were performed for rejecting the null hypothesis of equality in the proportions of successes for the study's primary outcome, assuming equal numbers of patients in each period. These calculations correspond to an analysis using Fisher's exact test with a two-sided significance level of α = 0.05. We assumed if the true proportions of successes for the two periods were 70% and 77% (historical comparison to intervention, 7 percentage point absolute and 10% relative improvement), then sample sizes of 650 patients already prescribed ART per period would be required to have 80% power to reject the null hypothesis.
Allowing for an annual attrition rate of 25%, sample sizes of 1157 patients per period would be required to have 80% power to reject the null hypothesis. We reviewed EMRs for all patients >17 years of age who had one or more OAMC visits during either the historical comparison or intervention period (100% chart recovery from two sites). Unfortunately, EMR data from the Miami site (all 650 patient records) were incomplete. Miami uses a different EMR system than Huntsville and Atlanta, and important variables were missing or could not be abstracted. Therefore, data from Miami were excluded from our analyses. We analyzed all patients regardless of their exposure to the intervention video.
We computed summary proportions for selected categorical socio-demographic variables (sex/gender, race/ethnicity, age, HIV risk, and time since HIV diagnosis as assessed on index visit date) by site for the comparison and intervention groups (Table 1). We did not statistically test the equivalence of the composition of the comparison and intervention groups because many patients were in both study periods. Simple proportions were used for assessing treatment initiation (Table 2), and a 10-month adaptation of HRSA's (which administers the Ryan White HIV/AIDS Program) method for retention in care was used for that outcome (Table 3). Time-to-event methods were used for assessing viral load suppression, as a proxy for medication adherence (Tables 4, 5, 6 and 7).
Planned primary analyses included outcomes of ART prescription within 7 days of index visit (Table 2), follow-up OAMC visits during a study period (Table 3), and having suppressed viral load (Tables 4 and 5). Subjects had one index visit per condition, and visits during one condition could not be used for measurements in the other condition. For example, an OAMC visit early in the intervention period was not counted toward retention for the comparison period. A planned secondary analysis was having an undetectable viral load (Tables 6 and 7) as an outcome. For binary outcomes, we computed proportions in the comparison and intervention arms, the percentage point change with approximate 95% confidence intervals, and p- Perinatal We performed planned subgroup analyses to assess whether intervention effects varied by clinic and by selected categorical socio-demographic variables (sex/gender, race/ethnicity, age, HIV risk, and time since HIV diagnosis as assessed on index visit date). All analyses were performed using SAS statistical software (version 9.4, SAS Institute, Inc., Cary, NC) and were conducted by one author (CBB). All statistical tests were two-tailed. We did not adjust for the overlap between the comparison and intervention groups, which tends to give conservative significance tests assuming positive correlations between outcomes.

Results
There were a total of 4003 patients across both study conditions (Atlanta = 2629, Huntsville = 1374) (Fig 1, S2 Appendix, Table 1). Of the patients in Atlanta 1706 were in one study condition, and 923 (54.1%) were in both conditions. Of the patients in Huntsville 794 were in one study condition, and 580 (73.0%) were in both conditions. Patient sex, gender identity, and HIV risks were similar across sites and conditions. Compared to Atlanta, Huntsville had slightly more (4 percentage points) younger patients (18)(19)(20)(21)(22)(23)(24) year category) and somewhat more (8 percentage points) patients who received their HIV diagnosis over 10 years ago. The main difference between sites was race and ethnicity. Atlanta's clinic population was 90% black, while Huntsville's was 48% black and 44% white. No adverse events were reported during the study. For HIV treatment initiation we found a significant (p < 0.01) overall increase of 10.4 percentage points between study periods and significant intervention effects at both sites.   (14.1 percentage points, p = 0.02). Significant increases were found among those diagnosed <1 year (23.1 percentage points, p < 0.01), 1-5 years (8.0 percentage points, p < 0.01), 6-10 years (6.5 percentage points, p = 0.03), and >10 years (7.4 percentage points, p = 0.01) ago who were exposed to the intervention. Differences in retention in HIV care, although observed in the anticipated direction for both sites combined (1.4 percentage point increase), were not statistically significant and did not differ substantially by site (Table 3). Retention increased 28.0 percentage points between study periods for patients in the 'other' racial category. Although the number of patients in this sub-group was small, this difference was statistically significant (p = 0.03). No statistically significant differences were observed when examined across sex/gender, remaining race/ethnicity categories, age, HIV risk, or time since HIV diagnosis.
Viral suppression was the primary measure of medication adherence. At Huntsville and Atlanta combined, viral suppression improved 6.0 percentage points (p < 0.01) between study periods. (Table 4) However, viral suppression in Atlanta increased by 17.5 percentage points (p < 0.01), but decreased in Huntsville by 8.6 percentage points (p < 0.01). In Atlanta, all of the percentage point changes for subgroups were increasing between study periods. Significant increases were observed for patients who were male or female; black, Hispanic, or white; between 35-87 years old; had heterosexual or male-to-male sexual risk; and were diagnosed one or more years ago. (Table 5) Conversely, in Huntsville, all of the percentage point changes for subgroups were decreasing between study periods. Significant decreases were observed for patients who were female or transgender; black or Hispanic; between 35-87 years old; had male-to-male sexual risk; and were diagnosed six or more years ago.
Similar findings were observed with respect to the secondary measure of laboratory-confirmed undetectable viral load. At both sites combined, undetectable viral load improved 3.8 percentage points (p = 0.03) between study periods. (Table 6) The sites again had divergent results. Undetectable viral load in Atlanta improved by 15.2 percentage points (p < 0.01), but dropped in Huntsville by 7.6 percentage points (p = 0.01). Again in Atlanta, all of the percentage point changes for subgroups were increasing between study periods. (Table 7) Significant increases were observed for patients who were male or female; black; between 25-34 or 35-87 years old; for any transmission risk category; and for any time since diagnosis. Conversely, in Huntsville, all of the percentage point changes for subgroups were decreasing between study periods. Significant decreases were observed for patients who were female or transgender; black or Hispanic; between 35-87 years old; had male-to-male sexual risk; and were diagnosed 6-10 years ago. Effects of brief video on HIV patient treatment initiation and adherence

Discussion
In our evaluation of the TCOM video, we found a significant overall increase in the percentage of treatment initiators among patients who visited the sites while the video played and posters were displayed (intervention condition), compared to patients who visited without the video and posters (comparison condition). The overall positive change in treatment initiation also was observed in sub-group analyses of demographic (i.e., sex, race/ethnicity, age) and behavioral characteristics (i.e., HIV risk, time since HIV diagnosis). The nature of the study design allows us to draw conclusions about association but not causation. Given that TCOM featured multiple vignettes that modeled PWH of diverse racial/ethnic backgrounds and sexual orientations, it is not surprising that the video showed evidence of changing behavior among a heterogeneous patient population. However, the overall effects for retention in HIV care were statistically non-significant. Medication adherence, measured by viral suppression and undetectable viral load, was significantly greater during the intervention period than the comparison period in Atlanta and both sites combined. Other co-occurring factors may have contributed to observed results, although their potential effect is unclear. For example, the findings from the Strategic Timing of Antiretroviral Therapy (START) study, which showed Effects of brief video on HIV patient treatment initiation and adherence the benefit of early ART initiation, were published in August 2015.
[1] START's results were widely known prior to publication and likely integrated in clinical practice before our study's comparison period. Also, HIV treatment guideline recommendation to initiate ART for all PWH was upgraded to the highest level (i.e., A1) in January 2016. [18] Finally, health insurance coverage increased nationwide during the study period; however, most PWH are Medicaid-eligible. Alabama and Georgia are not Medicaid expansion states, so increased national Medicaid coverage likely had no impact on the numbers of PWH attending the study clinics. Unlike Atlanta, Huntsville's adherence results were negative. The reason is unclear. We were unable to explore influences of socioeconomic status, educational attainment, or health insurance coverage because the study did not collect these EMR data. Stratifying by race/ethnicity, age, HIV risk, and time since HIV diagnosis did not explain the difference between sites. Sub-group analyses of adherence in Huntsville showed negative results across all groups, suggesting systemic (e.g., clinic hours) or environmental (e.g., local policies) factors at work. We contacted the Huntsville clinic to inquire about any such changes between study conditions. The Huntsville clinic confirmed there had been a 23.5% increase in the number of new patients during the intervention period but reported no environmental, political, policy, or other changes in the clinic or Huntsville that could have contributed to the observed intervention effects (S3 Appendix). It is highly probable that the Huntsville clinic patients who were new to HIV treatment in the intervention condition did not have time to become virally suppressed during the study measurement period. If we had used a less stringent medication adherence measure (e.g., any viral load suppression within study period), the results may have been higher. Ceiling effects also may have contributed to the between-site difference. Huntsville had 77.7% suppression and 73.4% undetectable proportions during the comparison period; these proportions were only 41.1% and 9.7%, respectively, in Atlanta. Thus, Huntsville had less room for improvement.
The results presented in this paper extend the findings of Warner et al. (2008) [13] by showing that a video-based intervention focused on HIV treatment can be effective at improving HIV clinical outcomes. Having an effective tool that can be easily delivered in a waiting room affords a high degree of audience-targeting with relatively low effort. As an effective approach to supporting improved HIV clinical outcomes, this intervention has the potential to be widely disseminated to HIV clinics and other appropriate settings. Additionally, it is reasonable to expect that the acceptability among patients and clinics seen with SITC [19] would be true of TCOM.
Video as an intervention tool continues to be prominent in current public health approaches. [20] TCOM represents the first stand-alone video-based intervention we are aware of that is effective at improving HIV-related health outcomes for PWH. The relative overall change in treatment initiation (i.e., starting a new behavior) for TCOM is comparable to the level of change in incident STDs (i.e., resulting from adopting new behaviors) for SITC (10%). [13] Although video-based intervention effect sizes may be modest when compared to those achieved from more resource-intensive interventions, video-based interventions deliver their content consistently and can be scaled more efficiently, because they are rapid to disseminate, easy to implement, and inexpensive to sustain. For example, 260 agencies initiated V/V in the first 20 months of its availability [21], and over 2100 clinics requested SITC in its first 15 months. [19] TCOM has the potential to be an important addition to the V/V and SITC set of videos. The time and resources required for rigorous evaluation are barriers to developing and evaluating new videos, and changes in societal norms and advances in HIV prevention and treatment may influence a video's continued relevance. Given the relative scarcity of public health resources, the trade-offs between faster dissemination and lengthy evaluation should be considered. By forgoing intensive evaluation of videos that follow successful models, new prevention videos could be made available sooner. This could likely have a significant positive impact on the health of PWH, reduce future health care costs, and help achieve national HIV prevention, care, and treatment goals.
Our study suggests that there were significant intervention effects among specific sub-groups for treatment initiation and medication adherence outcomes. For treatment initiation, most demographic and behavioral characteristic groups appeared to have benefited from TCOM exposure. It is plausible that the observed intervention effects are due partly to the video's embedded prevention messages and its appeal to a wide patient audience. However, the intervention may have had an indirect effect if clinicians watched the video and learned how to effectively dialogue with patients about the benefits of early treatment. For both measurement levels of medication adherence, males, blacks, and older patients appeared to have benefited from exposure to TCOM. The significant intervention effects for both adherence measures seen among Atlanta, but not Huntsville, patients are difficult to explain. In addition to a possible ceiling effect, it is probable that Huntsville's simultaneous increases in patient population and treatment initiation temporarily increased clinic-wide viral load levels. Retention in care is a difficult outcome to measure in a standard way. HRSA's definition needed to be adapted for this study design, and the study's 10-month intervention period may not have been enough time to see the full effects of the intervention.

Study limitations
The study had a number of limitations. First, it was not possible to randomly assign patients to one or the other study condition; therefore, the findings may be subjected to bias. Second, the quasi-experimental study design is subject to secular trends (e.g., health insurance enrollment periods). Third, we did not measure exposure to the video, so we do not know whether or not patients paid attention to the video or saw it multiple times. Fourth, Huntsville played the Spanish-captioned video uninterrupted, while Atlanta played the English-captioned video with minor interruptions and some competition from another television. Finally, the sample size was affected by the exclusion of Miami's data.
Our study design also had several strengths, especially with regard to rapid intervention development and evaluation to promote improved HIV outcomes. Similar to our previous video-based intervention studies in STD clinics [10,11,13], this evaluation was conducted under clinic conditions. By integrating TCOM into the waiting room environment of two HIV clinics, we were able to evaluate intervention effectiveness in increasing treatment initiation and medication adherence among a relatively large clinic population of PWH. Our evaluation used medical outcomes and routinely collected EMR data rather than behavioral outcomes and self-reported data. Consequently, our overall treatment initiation and medication adherence findings are likely generalizable to other HIV-infected patients at these and other clinics with similar patient characteristics. Similar to our previous work [13], our study design included all clinic patients, thereby avoiding threats to external validity (e.g., low or differential participation rates) inherent in studies using only willing participants. Given that patients were not actively enrolled, they did not perceive the video as part of a study, and biases associated with active study participation were avoided.
We found that a brief video-based behavioral intervention in a clinic setting was effective at improving HIV-related outcomes among PWH. Due to its ease of delivery in a waiting room setting and low cost to sustain, it is important for HIV clinics and other healthcare settings serving PWH to consider integrating the TCOM video into standard clinical practice.