Contrasting HIV prevalence trends among young women and men in Zambia in the past 12 years: data from demographic and health surveys 2002–2014

Background: The HIV epidemic remains a concern on the global health agenda, despite progress made in reducing incidence. Investigation of trends among young people is important for monitoring HIV incidence and informing programming. The study examined geographical and sub-population differences in HIV prevalence trends among young people aged 15–24 years in Zambia. Methods: This study analysed data from Zambia Demographic and Health Surveys (ZDHSs) that were conducted in 2001–2, 2007, and 2013–14. A two-stage cluster stratified sampling procedure was used to select samples of 8050, 7969, and 18,052 for the three surveys, respectively. Young people (15–24 years) with known HIV status were selected for analysis. The outcome variable was HIV status. Log binomial regression analysis of generalised linear models was used to test for trends. Results: Overall HIV prevalence declined over the period 2001–2 to 2013–14 among women and men aged 15–49 years (17.8 and 12.9% to 15.1 and 11.3%, respectively). There was, however, an increase in HIV prevalence among urban young men over this period, from 3.7% in 2001–2 to 7.3% in 2013–14 (aRR 2.17, 95% CI 0.99˗4.75), and, in rural areas, from 2.6 to 3.6% (aRR 1.46, 95% CI 0.78˗2.75). In contrast, HIV prevalence among women declined over the same period of time. In urban areas, HIV prevalence among women declined from 15.2 to 10.7% (aRR 0.66, 95% CI 0.53˗0.93), while in rural areas it declined from 8.2 to 4.8% (aRR 0.41, 95% CI 0.59˗0.85). In addition, there was a narrowing gender gap in terms of HIV infection, as the prevalence ratio of females to males declined from 4.2 and 3.1 to 1.5 and 1.3, in urban and rural areas, respectively. Conclusions: The increase in HIV prevalence among urban young men over the past 12 years, contrasting declining trends among young women in both urban and rural populations, suggests differential effects of prevention efforts. Furthermore, findings that Zambia’s overall national HIV prevalence decline masks some striking sex and rural/urban differentials, indicate the need for reconsidering the prevention efforts for young urban men.publishedVersio

Examining the association between HIV prevalence and socioeconomic factors among young people in Zambia: Do neighbourhood contextual effects play a role?

Background: The study examined the association between HIV infection and individual and neighbourhood-level socioeconomic factors in Zambia. Methods: We used multilevel mixed effects logistic regression to examine the association of individual and neighbourhood level variables on HIV prevalence based on data from the 2013–14 and 2018 Zambia Demographic and Health Surveys, population-based cross-sectional surveys. The analysis was restricted to young people (15–24 years) with HIV serostatus results (n = 11,751 and n = 10,154). HIV serostatus was the outcome variable and socioeconomic status was measured by wealth, education and employment. Results: Overall, at individual level, education was associated with reduced odds of HIV infection among young women and men. Conversely, relative wealth was generally associated with increased odds of infection for both young women and men. Young, employed men were at reduced odds of HIV infection than the unemployed. Living in neighbourhoods with higher average level of education was associated with higher odds of HIV infection. In 2013–14, 13% and 11% of the variation in HIV infection among young men and women was attributed to neighbourhoods, while 20% and 11% variation was attributed to neighbourhoods in 2018. Inclusion of individual and neighbourhood variables in the full regression model accounted for 65.7% and 59.5% of explained variance in 2013–14 and 64.6% and 44.3% in 2018, for women and men, respectively. This reduced unexplained variance by an average of 56% in 2013–14 and 29% in 2018. Conclusion: We found that HIV infection among young people in Zambia is more strongly associated with individual-level socioeconomic factors compared to neighbourhood factors. Individual-level education remains an important socioeconomic factor associated with reduced odds of HIV infection. This suggests that the HIV response in Zambia should still focus on individual level prevention strategies.publishedVersio

Trends and determinants of modern contraceptive utilisation among adolescent girls aged 15-19 years in Sierra Leone: an analysis of Demographic and Health Surveys, 2008-2019

Background Modern contraceptives are effective interventions for preventing unwanted pregnancies, but their use remain low among adolescent girls in sub-Saharan Africa. First, we aimed to assess the trends of modern contraceptive use among adolescent girls aged 15-19 years in Sierra Leone in the period 2008-2019. Second, we explored how individual and contextual determinants of their use changed during this period. Methods We used a combined sample of 8,774 adolescent girls aged 15-19 years from the 2008, 2013, and 2019 Sierra Leone Demographic and Health Surveys (SLDHS), respectively, to estimate the modern contraceptive prevalence rate (MCPR) and unmet need for family planning. We described the method mix and sources of contraceptives among modern method users. We then conducted a multivariable logistic regression to examine the determinants of modern contraceptive use among sexually active adolescent girls, separately for 2008 and 2019. Results MCPR increased from 5.9% (95% CI=4.5-7.8) in 2008 to 21.0% (95% CI=19.2-22.9) in 2019. Most of the increase had occurred by 2013. Norplant (48.8%) and injectables (39%) were the common methods in 2019. Unmet need for family planning declined from 15.4% (95% CI=13.2-17.9) in 2008 to 11.3% (95% CI=9.9-12.7) in 2019, while the prevalence of modern contraceptive use among sexually active adolescent girls increased from 13.1% (95% CI=10-17.0) in 2008 to 43.5% (95% CI=40.2-46.9) in 2019. In both the 2008 and 2019 surveys, the adjusted odds of using modern contraceptives among sexually active adolescent girls were higher among those with more than one sexual partner in the past 12 months, and with secondary or tertiary education. In 2019, the adjusted odds of using a modern contraceptive were also lower among adolescent girls who were married or living with a partner, had more than one child, and lived in the Western province. Conclusions The increase in contraceptive use among adolescent girls in Sierra Leone had stalled since 2013. Interventions, including increasing awareness and accessibility to modern contraceptives, are urgently needed, particularly for adolescents without formal education. Comprehensive and affordable community and school-based interventions, including adolescent-friendly services, would be helpful

The relationship between individual and neighbourhood socioeconomic factors and HIV prevalence in a national population based survey conducted in Zambia

Background: Emerging issues in HIV prevention include the importance of considering underlying social and economic factors at the community and individual level. We examined the associations between individual and neighbourhood socioeconomic position (SEP) on HIV prevalence in young people in a high HIV prevalence country. Methods: The study re-analysed data from the Zambia Demographic and Health Survey, a cross- sectional nationally representative survey conducted in 2007. A two stage cluster stratified systematic sampling procedure was used to select a sample of 14,554, of which 10,444 were successfully interviewed and tested for HIV. Young people (aged 15-24 years) accounted for 40.7% of the sample (n=4,253). Neighbourhood level variables were derived by aggregating the individual level SEP indicators wealth, educational attainment and employment. A composite SEP indicator was constructed by a linear combination of SEP indicators and a neighbourhood level SEP indicator was derived by aggregating the composite SEP indictor. Multi-level mixed effects logistic regression models were used to examine the association between HIV prevalence and different measures of SEP at individual and neighbourhood level. Results: HIV prevalence among young people was 6.5%. The prevalence was higher in urban than rural areas (8.5% compared to 4.7%). A higher proportion of young women (8.5%) were infected with HIV compared to young men (4.3%). In rural areas, young people from high employment neighbourhoods were less likely to be infected with HIV (Age adjusted odds ratio (AOR) 0.34, 95% CI 0.18 - 0.63). However, living in neighbourhoods with middle educational attainment and the wealthiest neighbourhoods increased the risk of HIV infection. Neighbourhoods that scored high on the aggregate composite SEP indicator were also associated with increased odds of infection. At individual level better education and high composite SEP reduced the odds of HIV infection in urban areas, whereas there was no significant association for these two individual variables in rural areas. Employment reduced the odds of being infected in both rural and urban areas ((AOR 0.53, 95% CI 0.34 - 0.81) and (AOR 0.65, 95% CI 0.46 - 0.91), respectively). Controlling for neighbourhood SEP indicators did not affect the significant association of individual SEP indicators in urban areas, while in rural areas the associations were affected. Conclusion: There were marked differentials by residence in the way underlying socioeconomic factors affects HIV transmission both at the individual and community level. Our results suggest that community level factors have a more important influence in rural than urban areas. Preventive strategies targeting community level factors are urgently neede

Contrasting HIV prevalence trends among young women and men in Zambia in the past 12 years: data from demographic and health surveys 2002–2014

Background: The HIV epidemic remains a concern on the global health agenda, despite progress made in reducing incidence. Investigation of trends among young people is important for monitoring HIV incidence and informing programming. The study examined geographical and sub-population differences in HIV prevalence trends among young people aged 15–24 years in Zambia. Methods: This study analysed data from Zambia Demographic and Health Surveys (ZDHSs) that were conducted in 2001–2, 2007, and 2013–14. A two-stage cluster stratified sampling procedure was used to select samples of 8050, 7969, and 18,052 for the three surveys, respectively. Young people (15–24 years) with known HIV status were selected for analysis. The outcome variable was HIV status. Log binomial regression analysis of generalised linear models was used to test for trends. Results: Overall HIV prevalence declined over the period 2001–2 to 2013–14 among women and men aged 15–49 years (17.8 and 12.9% to 15.1 and 11.3%, respectively). There was, however, an increase in HIV prevalence among urban young men over this period, from 3.7% in 2001–2 to 7.3% in 2013–14 (aRR 2.17, 95% CI 0.99˗4.75), and, in rural areas, from 2.6 to 3.6% (aRR 1.46, 95% CI 0.78˗2.75). In contrast, HIV prevalence among women declined over the same period of time. In urban areas, HIV prevalence among women declined from 15.2 to 10.7% (aRR 0.66, 95% CI 0.53˗0.93), while in rural areas it declined from 8.2 to 4.8% (aRR 0.41, 95% CI 0.59˗0.85). In addition, there was a narrowing gender gap in terms of HIV infection, as the prevalence ratio of females to males declined from 4.2 and 3.1 to 1.5 and 1.3, in urban and rural areas, respectively. Conclusions: The increase in HIV prevalence among urban young men over the past 12 years, contrasting declining trends among young women in both urban and rural populations, suggests differential effects of prevention efforts. Furthermore, findings that Zambia’s overall national HIV prevalence decline masks some striking sex and rural/urban differentials, indicate the need for reconsidering the prevention efforts for young urban men

Examining the association between HIV prevalence and socioeconomic factors among young people in Zambia: Do neighbourhood contextual effects play a role?

Background: The study examined the association between HIV infection and individual and neighbourhood-level socioeconomic factors in Zambia. Methods: We used multilevel mixed effects logistic regression to examine the association of individual and neighbourhood level variables on HIV prevalence based on data from the 2013–14 and 2018 Zambia Demographic and Health Surveys, population-based cross-sectional surveys. The analysis was restricted to young people (15–24 years) with HIV serostatus results (n = 11,751 and n = 10,154). HIV serostatus was the outcome variable and socioeconomic status was measured by wealth, education and employment. Results: Overall, at individual level, education was associated with reduced odds of HIV infection among young women and men. Conversely, relative wealth was generally associated with increased odds of infection for both young women and men. Young, employed men were at reduced odds of HIV infection than the unemployed. Living in neighbourhoods with higher average level of education was associated with higher odds of HIV infection. In 2013–14, 13% and 11% of the variation in HIV infection among young men and women was attributed to neighbourhoods, while 20% and 11% variation was attributed to neighbourhoods in 2018. Inclusion of individual and neighbourhood variables in the full regression model accounted for 65.7% and 59.5% of explained variance in 2013–14 and 64.6% and 44.3% in 2018, for women and men, respectively. This reduced unexplained variance by an average of 56% in 2013–14 and 29% in 2018. Conclusion: We found that HIV infection among young people in Zambia is more strongly associated with individual-level socioeconomic factors compared to neighbourhood factors. Individual-level education remains an important socioeconomic factor associated with reduced odds of HIV infection. This suggests that the HIV response in Zambia should still focus on individual level prevention strategies

Prevalence and factors associated with early childbearing in sub-saharan Africa: evidence from demographic and health surveys of 31 countries

Abstract Background Early childbearing remains a public health concern in sub-Saharan Africa (SSA) because it has substantial implications for women’s and children’s health and population control. However, little is known about recent changes in early childbearing in the region following the implementation of the Family Planning 2020 initiative (FP2020) national-level interventions. Thus, this study examined factors associated with early childbearing among women in SSA. Methods The study used data from the most recent Demographic and Health Surveys conducted in 31 countries in sub-Saharan Africa between 2010 and 2021. The analysis included a pooled sample of 54,671 parous young women aged 20–24 years. A multivariable binary logistic regression model was used to examine the association between early childbearing and individual and household-level factors. All analyses were weighted to account for complex survey design. Results The study shows that the mean prevalence of early childbearing was high in SSA at 39% (95% CI: 35, 43). Chad had the highest prevalence of early childbearing, 62% (95% CI: 60, 64) while Rwanda had the lowest prevalence of 13% (95% CI: 11, 15). Completing secondary school (aOR = 0.57; 95% CI: 0.52, 0.62) or attaining tertiary level education (aOR = 0.32; 95% CI: 0.22, 0.45), first sexual debut in the age range 15–24 years (aOR = 0.15; 95% CI: 0.14, 0.16) and desire for a small family size (aOR = 0.63; 95% CI: 0.58, 0.69) were associated with reduced odds of early childbearing among young women in SSA. Conclusion The study has established that the prevalence of early childbearing is high in SSA. Level of education, age at first sexual debut, household size, and desired family size are associated with early childbearing in SSA. Governments of SSA countries should enhance sexual and reproductive health interventions to change reproductive behaviour, particularly in adolescents and young women

Trends and determinants of modern contraceptive utilisation among adolescent girls aged 15-19 years in Sierra Leone: an analysis of Demographic and Health Surveys, 2008-2019

# Background Modern contraceptives are effective interventions for preventing unwanted pregnancies, but their use remain low among adolescent girls in sub-Saharan Africa. First, we aimed to assess the trends of modern contraceptive use among adolescent girls aged 15-19 years in Sierra Leone in the period 2008-2019. Second, we explored how individual and contextual determinants of their use changed during this period. # Methods We used a combined sample of 8,774 adolescent girls aged 15-19 years from the 2008, 2013, and 2019 Sierra Leone Demographic and Health Surveys (SLDHS), respectively, to estimate the modern contraceptive prevalence rate (MCPR) and unmet need for family planning. We described the method mix and sources of contraceptives among modern method users. We then conducted a multivariable logistic regression to examine the determinants of modern contraceptive use among sexually active adolescent girls, separately for 2008 and 2019. # Results MCPR increased from 5.9% (95% CI=4.5-7.8) in 2008 to 21.0% (95% CI=19.2-22.9) in 2019. Most of the increase had occurred by 2013. Norplant (48.8%) and injectables (39%) were the common methods in 2019. Unmet need for family planning declined from 15.4% (95% CI=13.2-17.9) in 2008 to 11.3% (95% CI=9.9-12.7) in 2019, while the prevalence of modern contraceptive use among sexually active adolescent girls increased from 13.1% (95% CI=10-17.0) in 2008 to 43.5% (95% CI=40.2-46.9) in 2019. In both the 2008 and 2019 surveys, the adjusted odds of using modern contraceptives among sexually active adolescent girls were higher among those with more than one sexual partner in the past 12 months, and with secondary or tertiary education. In 2019, the adjusted odds of using a modern contraceptive were also lower among adolescent girls who were married or living with a partner, had more than one child, and lived in the Western province. # Conclusions The increase in contraceptive use among adolescent girls in Sierra Leone had stalled since 2013. Interventions, including increasing awareness and accessibility to modern contraceptives, are urgently needed, particularly for adolescents without formal education. Comprehensive and affordable community and school-based interventions, including adolescent-friendly services, would be helpful

Covariates for predictive model for measles seropositivity.

Covariates for predictive model for measles seropositivity.</p