Mobility among youth in Rakai, Uganda: Trends, characteristics, and associations with behavioural risk factors for HIV.

Mobility, including migration and travel, influences risk of HIV. This study examined time trends and characteristics among mobile youth (15-24 years) in rural Uganda, and the relationship between mobility and risk factors for HIV. We used data from an annual household census and population-based cohort study in the Rakai district, Uganda. Data on in-migration and out-migration were collected among youth (15-24 years) from 43 communities from 1999 to 2011 (N = 112,117 observations) and travel among youth residents from 2003 to 2008 (N = 18,318 observations). Migration and travel were more common among young women than young men. One in five youth reported out-migration. Over time, out-migration increased among youth and in-migration remained largely stable. Primary reasons for migration included work, living with friends or family, and marriage. Recent travel within Uganda was common and increased slightly over time in teen women (15-19 years old), and young adult men and women (20-24 years old). Mobile youth were more likely to report HIV-risk behaviours including: alcohol use, sexual experience, multiple partners, and inconsistent condom use. Our findings suggest that among rural Ugandan youth, mobility is increasingly common and associated with HIV-risk factors. Knowledge of patterns and characteristics of a young, high-risk mobile population has important implications for HIV interventions.

Postcoital penile washing and the risk of HIV acquisition in uncircumcised men.

BACKGROUND: Postcoital genital washing by uncircumcised men may affect the risk of male HIV acquisition. METHOD: We assessed the association between self-reported washing after sex in 2976 initially HIV-negative, uncircumcised men enrolled in a prospective cohort study in Rakai, Uganda. RESULTS: Data from the 2976 participants who reported sexual intercourse in the past 12 months contributed 4290 visits, with 7316.6 person-years of observation during the 2-year follow-up. The overall HIV-incidence was 1.28/100 person-years 95%CI (1.04-1.57). About 91.0% of men reported washing their penis after sex, and their HIV incidence was 1.34/100 person-years (95%CI 1.08-1.66), compared with an incidence of 0.62/100 person-years (95%CI 0.17-1.60) in men who did not wash their penis after intercourse. Using Poisson multivariable regression, the adjusted incidence rate ratio of HIV acquisition associated with postcoital washing was 1.94 (95%CI 0.71-5.29). CONCLUSION: Postcoital penile washing, as practiced in this rural African population does not afford protection from HIV acquisition among uncircumcised men, and may increase risk.

Multiple sexual partnerships among female adolescents in rural Uganda: the effects of family structure and school attendance.

BACKGROUND: A better understanding is needed of the contextual factors that influence HIV risk behaviors among female adolescents in sub-Saharan Africa. The objectives of this study were to assess the influence of family structure on lifetime sexual partners and on the number of sexual partners in the last year among female adolescents in rural Rakai, Uganda. In addition, the study assessed whether the influence of family structure on these outcomes differed by the school attendance status of the adolescents. METHODS: The sample consisted of 2337 unmarried adolescent girls, aged 15-19, enrolled in the Rakai Community Cohort Study. The last survey interview within the time period of 2001-2008 available for each girl was used. Analyses were stratified by age (15-17 year olds and 18-19 year olds) and school status. Multinomial logistic and poisson regressions were used. RESULTS: Living in a household with a biological father was protective against both outcomes. Family structure was not associated with the outcomes among in-school adolescents but it was significantly associated with the outcomes among out-of-school adolescents. CONCLUSION: The findings suggest that understanding the familial context in which female adolescents develop, as well as its interaction with school attendance, is important for HIV prevention efforts. Both research and programmatic initiatives must consider the interplay between the family and school domains when considering ways to reduce HIV acquisition among adolescent women.

Family structure effects on early sexual debut among adolescent girls in Rakai, Uganda.

This study assessed the association between household family structure and early sexual debut among adolescent girls, ages 15-19, in rural Rakai District, Uganda. Early sexual debut is associated with detrimental physical, emotional and social outcomes, including increased risk of HIV. However, research on the family's role on adolescents' sexual risk behaviors in sub-Sahara Africa has been minimal and rarely takes into account the varying family structures within which African adolescents develop. Using six rounds of survey data (2001-2008) from the Rakai Community Cohort Study, unmarried adolescent girls (n=1940) aged 15-17 at their baseline survey, were followed until age 19. Parametric survival models showed that compared to adolescent girls living with both biological parents, girls who headed their own household and girls living with step-fathers, grandparents, siblings, or other relatives had significantly higher hazards of early sexual debut before age 16. Adolescent girls were significantly more likely to debut sexually if neither parent resided in the household, either due to death or other reasons. In addition, absence of the living biological father from the home was associated with higher risk of sexual debut, regardless of the biological mother's presence in the home. Our study's findings suggest that family structure is important to adolescent girls' sexual behavior. There is need for research to understand the underlying processes, interactions and dynamics of both low and high risk family structures in order to devise and strategically target interventions targeted for specific types of family structures.

Longitudinal study of correlates of modern contraceptive use and impact of HIV care programmes among HIV concordant and serodiscordant couples in Rakai, Uganda.

OBJECTIVE: To assess trends and determinants of family planning use and impact of HIV serostatus among couples. METHODS: Couples' data were retrospectively linked from cohort surveys in Rakai, Uganda between 1999 and 2011, and were classified by HIV status as concordant (M+F+/M-F-) or serodiscordant (M-F+/M+F-). HIV care (HIVC) was grouped into three periods, pre-antiretroviral therapy (pre-HIVC) (<2004), HIVC roll-out (2005-2007) and HIVC scale-up (≥ 2008). Trends in couple contraceptive use were assessed by chi-square test (χ(2)) for trend, and multinomial logistic regression was used to estimate adjusted odds ratios (ORs) of predictors of contraceptive use. RESULTS: A total of 6139 couples contributed 13,709 observations. Hormonal contraception (HC) use increased over time from 22.9% to 33.9%, p<0.001), with significant increases among M-F- (23.2% to 34.8%, p<0.0001) and M+F+ (20.8% to 32.2%, p=0.0005), but not serodiscordant couples. Condom use significantly increased among M+F+ (30.3% to 48.0%, p<0.001) and serodiscordant couples (24.2% to 48.7%, p<0.001), but not among M-F- couples. Dual use of HC and condoms increased over time, irrespective of HIV status. Factors associated with increases in contraceptive use were: higher education, co-resident children, male non-marital relationship and scaled-up HIVC phase. Enrollment into HIVC was associated with increased HC and condom use among HIV+ concordant [adjusted OR (adjOR)=3.03; 95% confidence interval (CI) 1.69-5.44 and adjOR=4.46, 95% CI 2.53-7.86, respectively], and serodiscordant couples (adjOR=2.21; 95% CI 1.25-3.92 and adjOR=4.75; 95% CI 2.89-7.82, respectively). CONCLUSIONS: Use of modern contraception and dual method use increased over time, particularly after enrollment into HIVC. Integration of HIV and reproductive health services is critical for prevention of unwanted pregnancies and HIV infection.

Effects of hormonal contraceptive use on HIV acquisition and transmission among HIV-discordant couples.

BACKGROUND: The risk of HIV associated with hormonal contraceptives is controversial. We assessed hormonal contraceptive use and HIV incidence in HIV-discordant couples in Rakai, Uganda. METHODS: HIV-discordant couples were retrospectively identified from a cohort between 1999 and 2009. Hormonal contraception included oral contraception, depomedroxyprogesterone acetate (DMPA), and implants (Norplant). Poisson regression estimated adjusted incidence rate ratios (adjIRRs) associated with hormonal contraceptive methods. A case-control subanalysis estimated odds ratios (ORs) of HIV associated with hormonal contraceptive, adjusted for viral load and age. RESULTS: We identified 190 male HIV-positive/female HIV-negative (M+F-) and 159 male HIV- negative/female HIV-positive (M-F+) couples not using antiretroviral therapy or condoms. Female HIV incidence was 5.8/100 person-years (py) among nonhormonal contraceptive users, 12.0/100 py among oral contraceptive users [adjIRR 2.65, 95% confidence interval (CI) 0.82-8.60], 4.5 among Norplant users (adjIRR: 0.89, 95% CI 0.11-7.10), and 7.5/100 py among DMPA users (adjIRR 1.42, 95% CI 0.60-3.36). Male HIV incidence was 7.4/100 py during nonhormonal contraceptive use, 16.5/100 py during female oral contraceptive use (adjIRR 2.52, 95% CI 0.49-12.95), and 4.9/100 py with DMPA use (adjIRR 0.57, 95% CI 0.19-1.70). The number of female seroconverters was three among oral contraceptive users, one among Norplant users, and seven among DMPA users. Male seroconverters were two during female oral contraceptive use, none with Norplant use, and three with DMPA use. In a nested case-control analysis after adjustment for HIV viral load, the adjOR associated with oral contraceptive use was 1.59 (95% CI 0.32-97.85) for M+F- and 2.11 (95% CI 0.18-25.26) for M-F+ couples. For DMPA use, the adjOR was 1.44 (95% CI 0.46-4.51) for M+F- and 1.40 (95% CI 0.30-6.49) for M-F+ couples. CONCLUSION: We did not observe significant risk of HIV acquisition or transmission with oral contraceptives or DMPA use in HIV discordant couples, but several point estimates were above 1.0 and statistical power was limited.

Sexual coercion among adolescent women in Rakai, Uganda: does family structure matter?

Studies on adolescent girls' vulnerability to sexual coercion in Sub-Saharan Africa have focused mainly on individual and partner risk factors, rarely investigating the role the family might play in their vulnerability. This study examined whether household family structure and parental vital status were associated with adolescent girls' risk of sexual coercion in Rakai, Uganda. Modified Poisson regression was used to estimate relative risk of sexual coercion in the prior 12 months among 1,985 unmarried and married adolescent girls aged 15 to 19 who were participants in the Rakai Community Cohort Study between 2001 and 2008. Among sexually active girls, 11% reported coercion in a given past year. Unexpectedly, living with a single mother was protective against experiencing coercion. As much as 4.1% of never-married girls living with single mothers reported coercion, compared to 7.8% of girls living with biological fathers (adj. relative risk [RR] = 2.24, 95% confidence interval [CI]: 0.98-5.08) and 20% of girls living in stepfather households (adj. RR = 4.73, 95% CI: 1.78-12.53). Ever-married girls whose mothers alone were deceased were more likely to report coercion than those with both parents alive (adj. RR = 1.56, 95% CI: 1.08-2.30). Protecting adolescent girls from sexual coercion requires prevention approaches that incorporate the family, with particular emphasis on including the men (e.g. fathers) who might play an influential role in young girls' sexual development. Understanding the family dynamics underlying the risk and protective effects of a given household structure might highlight new ways in which to prevent sexual coercion.

Incidence of orphanhood before and after implementation of a HIV care programme in Rakai, Uganda: Alpha Network HIV Supplement.

OBJECTIVE: To compare the incidence of orphanhood among children <15 years of age before and after implementing HIV care in Rakai, Uganda. METHODS: Annual household censuses and surveys were conducted on January 2001 to September 2009 in a community cohort, where HIV care including antiretroviral therapy (ART) started in June 2004. Data included parental survival of children aged 0-14 years and HIV status from consenting adults aged 15-49 years. The incidence of orphanhood was estimated as the number of new orphans divided by person-years, determined during three time periods: Pre-HIV care roll-out (January 2001-June 2003) 1-3 years before the advent of HIV care in Rakai programme, HIV care transition from September 2003-May 2006, and the expanded HIV care period from August 2006-September 2009. Poisson regression was used to estimate incidence rate ratios (IRR) of orphanhood and 95% confidence intervals, and the Population attributable fraction (PAF) of incident orphanhood due to HIV+ parental status was estimated as pd*(RR-1)/RR. RESULTS: A total of 20,823, 21,770 and 23,700 children aged 0-14 years were censused at the three periods, respectively. The prevalence of orphanhood significantly declined; 17.2% during Pre-HIV care roll-out, 16.0% at HIV care transition and 12.6% at expanded HIV care period (chi2 trend, P < 0.0001). The incidence of orphanhood also declined significantly with increasing HIV care from 2.10/100 person-years (py), 1.57/100 py and 1.07/100 py (chi2 trend, P < 0.0001). The largest declines were observed among children with HIV+ parent(s), 8.2/100 pyr, 5.2/100 pys and 3.4/100 pyr. PAF also declined from 35.3% in the pre-HIV care to 27.6% in the expanded HIV care periods. CONCLUSION: After the availability of ART, there was a decline in PAF of incident orphanhood due to parental HIV+ status, and in the incidence of orphanhood especially among children with HIV-infected parents.

Non-enrollment for free community HIV care: findings from a population-based study in Rakai, Uganda.

Improved understanding of HIV-related health-seeking behavior at a population level is important in informing the design of more effective HIV prevention and care strategies. We assessed the frequency and determinants of failure to seek free HIV care in Rakai, Uganda. HIV-positive participants in a community cohort who accepted VCT were referred for free HIV care (cotrimoxazole prophylaxis, CD4 monitoring, treatment of opportunistic infections, and, when indicated, antiretroviral therapy). We estimated proportion and adjusted Prevalence Risk Ratios (adj. PRR) of non-enrollment into care six months after receipt of VCT using log-binomial regression. About 1145 HIV-positive participants in the Rakai Community Cohort Study accepted VCT and were referred for care. However, 31.5% (361/1145) did not enroll into HIV care six months after referral. Non-enrollment was significantly higher among men (38%) compared to women (29%, p=0.005). Other factors associated with non-enrollment included: younger age (15-24 years, adj. PRR = 2.22; 95% CI: 1.64, 3.00), living alone (adj. PRR = 2.22; 95% CI: 1.57, 3.15); or in households with 1-2 co-residents (adj. PRR = 1.63; 95% CI: 1.31, 2.03) compared to three or more co-residents, or a CD4 count >250 cells/ul (adj. PRR = 1.81; 95% CI: 1.38, 2.46). Median (IQR) CD4 count was lower among enrolled 388 cells/ul (IQR: 211,589) compared to those not enrolled 509 cells/ul (IQR: 321,754). About one-third of HIV-positive persons failed to utilize community-based free services. Non-use of services was greatest among men, the young, persons with higher CD4 counts and the more socially isolated, suggesting a need for targeted strategies to enhance service uptake.

Use of HIV-related services and modern contraception among women of reproductive age, Rakai Uganda.

Voluntary counseling and testing (VCT) and HIV care (HIVC) can be an opportunity for reproductive health messages and services integration. The objective of this study is to assess the association between uptake of HIV-related services and use of modern contraception among reproductive-age women. Data are derived from community cohort data, where HIV+ respondents were referred to the Rakai Health Sciences program's HIVC clinic. Use of modern contraceptive and VCT receipt were by self-report. Multinomial logistic regression was used to estimate relative risk ratios (RRR) of contraception use by HIVC and VCT. Receipt of VCT was significantly associated with higher use of condoms for FP, adj.RRR 1.78 (1.07, 2.95), and other modern contraceptives, adj.RRR = 1.56(1.15, 2.11). Increasing level of HIVC was associated with decreasing level of unmet need for contraception. Use of condoms for family planning is common among HIV-related services attendees. Utilization of other modern contraceptive methods needs to be increased.

Survival of infants born to HIV-positive mothers, by feeding modality, in Rakai, Uganda.

BACKGROUND: Data comparing survival of formula-fed to breast-fed infants in programmatic settings are limited. We compared mortality and HIV-free of breast and formula-fed infants born to HIV-positive mothers in a program in rural, Rakai District Uganda. METHODOLOGY/PRINCIPAL FINDINGS: One hundred eighty two infants born to HIV-positive mothers were followed at one, six and twelve months postpartum. Mothers were given infant-feeding counseling and allowed to make informed choices as to whether to formula-feed or breast-feed. Eligible mothers and infants received antiretroviral therapy (ART) if indicated. Mothers and their newborns received prophylaxis for prevention of mother-to-child HIV transmission (pMTCT) if they were not receiving ART. Infant HIV infection was detected by PCR (Roche Amplicor 1.5) during the follow-up visits. Kaplan Meier time-to-event methods were used to compare mortality and HIV-free survival. The adjusted hazard ratio (Adjusted HR) of infant HIV-free survival was estimated by Cox regression. Seventy-five infants (41%) were formula-fed while 107 (59%) were breast-fed. Exclusive breast-feeding was practiced by only 25% of breast-feeding women at one month postpartum. The cumulative 12-month probability of infant mortality was 18% (95% CI = 11%-29%) among the formula-fed compared to 3% (95% CI = 1%-9%) among the breast-fed infants (unadjusted hazard ratio (HR) = 6.1(95% CI = 1.7-21.4, P-value < 0.01). There were no statistically significant differentials in HIV-free survival by feeding choice (86% in the formula-fed compared to 96% in breast-fed group (Adjusted RH = 2.8[95%CI = 0.67-11.7, P-value = 0.16] CONCLUSIONS/SIGNIFICANCE: Formula-feeding was associated with a higher risk of infant mortality than breastfeeding in this rural population. Our findings suggest that formula-feeding should be discouraged in similar African settings.