Towards universal voluntary HIV testing and counselling: a systematic review and meta-analysis of community-based approaches

Amitabh B Suthar, Nathan Ford, Pamela J Bachanas, Vincent J Wong, Jay S Rajan, Alex K Saltzman, Olawale Ajose, Ade O Fakoya, Reuben M Granich, Eyerusalem K Negussie, Rachel C Baggaley, Amitabh B Suthar, Nathan Ford, Pamela J Bachanas, Vincent J Wong, Jay S Rajan, Alex K Saltzman, Olawale Ajose, Ade O Fakoya, Reuben M Granich, Eyerusalem K Negussie, Rachel C Baggaley

Abstract

Background: Effective national and global HIV responses require a significant expansion of HIV testing and counselling (HTC) to expand access to prevention and care. Facility-based HTC, while essential, is unlikely to meet national and global targets on its own. This article systematically reviews the evidence for community-based HTC.

Methods and findings: PubMed was searched on 4 March 2013, clinical trial registries were searched on 3 September 2012, and Embase and the World Health Organization Global Index Medicus were searched on 10 April 2012 for studies including community-based HTC (i.e., HTC outside of health facilities). Randomised controlled trials, and observational studies were eligible if they included a community-based testing approach and reported one or more of the following outcomes: uptake, proportion receiving their first HIV test, CD4 value at diagnosis, linkage to care, HIV positivity rate, HTC coverage, HIV incidence, or cost per person tested (outcomes are defined fully in the text). The following community-based HTC approaches were reviewed: (1) door-to-door testing (systematically offering HTC to homes in a catchment area), (2) mobile testing for the general population (offering HTC via a mobile HTC service), (3) index testing (offering HTC to household members of people with HIV and persons who may have been exposed to HIV), (4) mobile testing for men who have sex with men, (5) mobile testing for people who inject drugs, (6) mobile testing for female sex workers, (7) mobile testing for adolescents, (8) self-testing, (9) workplace HTC, (10) church-based HTC, and (11) school-based HTC. The Newcastle-Ottawa Quality Assessment Scale and the Cochrane Collaboration's "risk of bias" tool were used to assess the risk of bias in studies with a comparator arm included in pooled estimates. 117 studies, including 864,651 participants completing HTC, met the inclusion criteria. The percentage of people offered community-based HTC who accepted HTC was as follows: index testing, 88% of 12,052 participants; self-testing, 87% of 1,839 participants; mobile testing, 87% of 79,475 participants; door-to-door testing, 80% of 555,267 participants; workplace testing, 67% of 62,406 participants; and school-based testing, 62% of 2,593 participants. Mobile HTC uptake among key populations (men who have sex with men, people who inject drugs, female sex workers, and adolescents) ranged from 9% to 100% (among 41,110 participants across studies), with heterogeneity related to how testing was offered. Community-based approaches increased HTC uptake (relative risk [RR] 10.65, 95% confidence interval [CI] 6.27-18.08), the proportion of first-time testers (RR 1.23, 95% CI 1.06-1.42), and the proportion of participants with CD4 counts above 350 cells/µl (RR 1.42, 95% CI 1.16-1.74), and obtained a lower positivity rate (RR 0.59, 95% CI 0.37-0.96), relative to facility-based approaches. 80% (95% CI 75%-85%) of 5,832 community-based HTC participants obtained a CD4 measurement following HIV diagnosis, and 73% (95% CI 61%-85%) of 527 community-based HTC participants initiated antiretroviral therapy following a CD4 measurement indicating eligibility. The data on linking participants without HIV to prevention services were limited. In low- and middle-income countries, the cost per person tested ranged from US$2-US$126. At the population level, community-based HTC increased HTC coverage (RR 7.07, 95% CI 3.52-14.22) and reduced HIV incidence (RR 0.86, 95% CI 0.73-1.02), although the incidence reduction lacked statistical significance. No studies reported any harm arising as a result of having been tested.

Conclusions: Community-based HTC achieved high rates of HTC uptake, reached people with high CD4 counts, and linked people to care. It also obtained a lower HIV positivity rate relative to facility-based approaches. Further research is needed to further improve acceptability of community-based HTC for key populations. HIV programmes should offer community-based HTC linked to prevention and care, in addition to facility-based HTC, to support increased access to HIV prevention, care, and treatment.

Review registration: International Prospective Register of Systematic Reviews CRD42012002554 Please see later in the article for the Editors' Summary.

Conflict of interest statement

The authors have declared that no competing interests exist. The opinions and statements in this article are those of the authors and do not necessarily represent the official policy, endorsement, or views of their organisations.

Figures

Figure 1. Flow of information through different…
Figure 1. Flow of information through different phases of the review.
Figure 2. Pooled uptake of community-based HTC…
Figure 2. Pooled uptake of community-based HTC approaches.
Bars indicate 95% CIs.
Figure 3. Uptake of index HTC.
Figure 3. Uptake of index HTC.
Figure 4. Uptake of self-testing.
Figure 4. Uptake of self-testing.
Figure 5. Uptake of mobile HTC.
Figure 5. Uptake of mobile HTC.
Figure 6. Uptake of door-to-door HTC.
Figure 6. Uptake of door-to-door HTC.
Asterisk: data reported were exclusively from children aged 18 mo.–13 y.
Figure 7. Uptake of workplace HTC.
Figure 7. Uptake of workplace HTC.
Asterisk: data reported were from the Democratic Republic of Congo, Rwanda, Burundi, Congo, and Nigeria.
Figure 8. Uptake of school-based HTC.
Figure 8. Uptake of school-based HTC.
Figure 9. Pooled relative risks of community-based…
Figure 9. Pooled relative risks of community-based HTC versus facility-based HTC.
The numerator for all RRs was the risk of an outcome in community-based testing, while the denominator was the risk of an outcome in facility-based testing.
Figure 10. Uptake of community-based HTC approaches…
Figure 10. Uptake of community-based HTC approaches among key populations.
Figure 11. Relative risks of community-based HTC…
Figure 11. Relative risks of community-based HTC versus facility-based HTC among key populations.
The numerator for all RRs was the risk of an outcome in community-based testing, while the denominator was the risk of an outcome in facility-based testing.
Figure 12. First-time testers in community-based testing…
Figure 12. First-time testers in community-based testing approaches.
Figure 13. First time testers in community-based…
Figure 13. First time testers in community-based testing approaches for key populations.
Figure 14. Pooled percentage of community-based HTC…
Figure 14. Pooled percentage of community-based HTC participants with CD4 counts above 350 cells/µl.
Figure 15. Linkage to care with community-based…
Figure 15. Linkage to care with community-based approaches to HTC.
Asterisk: study included 14 workplace sites in the Democratic Republic of Congo, Rwanda, Burundi, Congo, and Nigeria.

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