TIMING OF SEXUAL DEBUT AMONG UNMARRIED YOUTHS AGED 15–24 YEARS IN SUB-SAHARAN AFRICA

Sexual Behavior Among Emerging Adults in Africa: A Systematic Review and Meta-Analysis

BACKGROUND

Estimates on sexual behavior (SB) among emerging adults (EmA) is varied in literature, which presents a challenge when designing targeted interventions. We aimed to summarize literature on prevalence and risk factors of SB among EmA in Africa.

METHODS

A search for studies published in PubMed, Embase, and Psych Info by March 2023 was done. Studies involving EmA (18-25 years), conducted in Africa, and reporting 1 or more of 7 SBs were reviewed. Pooled prevalence estimates were summarized using forest plots. Heterogeneity in SB was explored. Risk factors were synthesized using a modified socioecological model.

RESULTS

Overall, 143 studies were analyzed. Noncondom use had the highest pooled prevalence (47% [95% confidence interval {CI}, 42-51]), followed by study-defined SB (37% [95% CI, 25%-50%]) and concurrency (37% [95% CI, 21%-54%]), multiple sex partners (31% [95% CI, 25%-37%]), younger age at sexual debut (26% [95% CI, 20%-32%]), age-disparate relationships (24% [95% CI, 17%-32%]), and transactional sex (19% [95% CI, 13%-26%]). Heterogeneity was partially explained by sex, with female participants having higher pooled prevalence estimates compared with their male counterparts. In 4 of the 7 outcomes, alcohol/drug use was the most common risk factor.

CONCLUSIONS

Sexual behavior was common among EmA and differentially higher in emerging female adults. Noncondom use had the highest pooled prevalence, which may contribute to the transmission of HIV and other sexually transmitted infections. Interventions targeting emerging female adults and alcohol/drug use may reduce SB, which may in turn mitigate transmission of HIV and other sexually transmitted infections among EmA in Africa.

Does timing of sexual debut following menarche among female youth in Uganda matter? A discrete time analysis

BACKGROUND

The burden of early sexual engagement among youth is enormous. It directly raises the risk of sexually transmitted infections(STIs) and indirectly contributes to unintended pregnancy, unsafe abortion, premature childbirth, and psychosocial issues. The aim of this paper was to estimate the timing of sexual debut and examine the factors influencing the timing of first sexual intercourse following menarche among female youth aged between 15 and 24 in Uganda.

METHOD

Self-reported data were extracted from the 2016 Uganda Demographic and Health Survey (UDHS), with a sub-sample of 7964 female youth from the individual woman file. Kaplan-Meier survival curves, decrement life-table analysis, and the discrete-time logit model were used to examine the timing of sexual debut and associated factors.

RESULTS

67.4% of the female youth had experienced first sexual initiation. Overall, the meantime to sexual debut was 4.4 years and the median time was 4.3 years, and all the female youth had experienced first sexual initiation by the end of the twelfth year following menarche. Significant factors found to influence the timing of sexual initiation include having higher education level (OR = 0.724: 95% CI = 0.59-0.89; p = 0.003), residing in the Northern region (OR = 0.877:95% CI = 0.79-0.97, p = 0.012), being employed (OR = 1.085: 95% CI = 1.01-1.16; p = 0.021), and being literate (OR = 1.155; 95% CI = 1.07-1.25; p < 0.001).

CONCLUSIONS

These findings are expected to be central in the bid to delay first sexual intercourse. Also they shed light on some of the factors associated with the timing of sexual debut which may be addressed at community level for non-school going youth and in schools, as school based prevention sexual and reproductive health programs. The findings highlight the need for future studies to collect more data to explore further the linkage between time to first debut since menarche and, mass media, religion, type of residence, and wealth index.

Timing of sexual debut and associated sociodemographic and HIV risk factors among young people in Eswatini

Young people in sub-Saharan Africa and specifically in Eswatini (previously Swaziland), continue to be disproportionately affected by HIV despite having equitable access to antiretroviral treatment. Early sexual debut is one of the many factors linked to HIV infection that is discussed in the context of general public health. Monitoring this behavior is essential for developing preventative, evidence-based interventions. This study aims to describe the early and/or typical sexual debut among young people in Eswatini and examines sociodemographic and HIV risk factors associated with early and typical sexual debut timing. We analyzed cross-sectional secondary data from the 2016/17 Swaziland HIV Incidence Measurement Survey (SHIMS), which had a representative sample of 2,383 young people aged 18-24. Respondents were selected using a two-stage stratified probability sampling design. We applied descriptive statistics and multivariable multinomial logistic regressions to examine the data. Out of the 2,383 respondents, 71.3% had sexual experience, with 4.1% and 26.5% reporting early sexual debut (<15 years) and typical sexual debut (<18 years), respectively. Our study found that age, sex, education, marital status, wealth, sexual partners in the past 12 months, and alcohol use were significantly associated with early and/or typical sexual debut. It is crucial to consider the sociodemographic factors and HIV risk factors of young people when designing programs and interventions aimed at preventing early sexual debut or transition. This approach is necessary to promote better sexual and reproductive health in alignment with sustainable development goals.

Consistent condom use among sexually active young adults in Ghana: an analysis of prevalence and associated factors

Consistent and proper condom use offers a safer, economically cheap and practically effective means of preventing HIV infection. Using the 2014 Ghana Demographic and Health Survey with a sample of 2779 sexually active youth (males = 682 and females = 2,097) in the age range 15-24, this study explored the prevalence of, and factors associated with consistent condom use among sexually active young adults in Ghana. Multivariate logistic regression was used to analyse the data. Our results showed that approximately 11% of the respondents reported consistent condom use in their previous sexual activity. Females were more likely than males to have used a condom consistently. The logistic regression results showed that females who had tested for HIV were less likely to use a condom consistently. However, those who have obtained family planning information from print media and those from the northern part of Ghana were more likely to practise consistent condom use. Furthermore, males who professed the Traditional African religion were less likely to use a condom consistently. In contrast, males in the rich wealth category were more likely to use a condom consistently. These findings underscore the need for behavioural change campaigns targeting young adults, particularly those who are sexually active, to encourage consistent condom use. These interventions should target young adults with less family planning knowledge, those who know their HIV status and those who profess the Traditional African religion.

Early Sexual Debut and Its Associated Factors Among Young Women Aged 15-24 in Mali: A Multilevel Analysis

Early sexual debut is associated with increased risk of several sexual and reproductive health problems, including unwanted pregnancies and sexually transmitted infections. Hence, determining factors that promote early sexual initiation is significant to guide policy and inform interventions aimed to promote the health of young people through to adulthood. This study examined the prevalence of early sexual debut and its associated factors among young women in Mali. Using cross-sectional nationally representative data from the 2018 Mali Demographic and Health Survey, a total of 4063 young women aged 15-24 were included in the study. Multilevel binary logistic regression analysis was done to determine the factors associated with early sexual debut. The results were presented using adjusted odds ratios (aOR) and 95% confidence intervals (CIs). The prevalence of early sexual debut in Mali was 17.8% (95% CI; 16-19.7%). Young women who attended higher school had lower odds of early sexual debut (aOR = 0.10, 95% CI; 0.01-0.82) compared to young women who had no formal education. Young women from richest households had lower odds of early sexual debut compared to those from the poorest households (aOR = 0.48, 95% CI; 0.27-0.82). Young women from households with large family size also had lower odds of experiencing early sexual debut compared to those in small family size (aOR = 0.81, 95% CI; 0.66-0.99). Furthermore, the odds of early sexual debut were lower among young women in Koulikoro (aOR = 0.59, 95% CI; 0.39-0.90), Sikasso (aOR = 0.35, 95% CI; 0.21-0.56), Segou (aOR = 0.40, 95% CI; 0.25-0.64), and Mopti (aOR = 0.44, 95% CI; 0.23-0.82) regions compared to young women in Kayes region. Higher odds of early sexual debut were found among currently employed compared to not currently employed young women (aOR = 1.74, 95% CI; 1.42-2.12) and currently married compared to not currently married young women (aOR = 4.64, 95% CI; 3.64-5.92). Young women from the Peulh ethnic groups compared to those from the Bambara ethnic groups were at a higher odds of early sexual debut (aOR = 1.43, 95% CI; 1.03-1.99). The findings suggest the need for interventions aimed at addressing early sexual debut among young women. These can include emphasizing the promotion and importance of female education, addressing the cultural practices that promote negative sexual norms/practices such as child marriages, and ensuring social change through efforts such as creating employment or economic opportunities for families.

Early sexual debut is associated with drug use and decreased educational attainment among males and females in Kisumu County, Kenya

Differing global sociocultural contexts of sexual relationships influence age at first sexual intercourse with potentially long-lasting region-specific effects such as increased risk of contracting HIV and other sexually transmitted infections (STIs). In these cross-sectional analyses of data from the screening and enrollment visits for an HIV incidence study in Kisumu County, Kenya, we evaluated factors associated with having experienced an early sexual debut (ESD) among males and females aged 18-35 years. Clinical evaluation was performed and sexual behaviors were assessed via questionnaire. ESD was defined as self-reported age 15 years or younger at first sexual intercourse. Robust Poisson regression was used to estimate prevalence ratios (PRs) and 95% confidence intervals (95% CIs) for factors associated with ESD. Of 1057 participants, 542 (51.3%) were female. Participants' median age at study screening was 25 years (interquartile range [IQR]: 22-29), and at sexual debut was 16 years (IQR: 14-17). Five hundred and four participants (47.7%) reported ESD. ESD was less common among females (PR 0.78, CI 0.67-0.90) and participants with more than primary education (PR 0.56, CI 0.47-0.66). ESD was more common in participants with a history of drug use (PR 1.28, CI 1.10-1.49). Drug use removed the protective effect of education (some secondary education or less, no drug use: PR 0.72, CI 0.61-0.85; some secondary education or less, drug use: PR 0.94, CI 0.74-1.18). ESD was common in our study and associated with lower educational attainment and increased likelihood of drug use. Interventions are needed early in life, well before 15 years of age, to encourage engagement in schooling and prevent drug use. Comprehensive sexual education and interventions to prevent drug use may be beneficial before the age of 15 years.

Measuring sexual behavior among in-school youth in Rwanda: a cross-sectional analysis of self-reported timing of first sex and correlates of early sexual debut

PURPOSE

Understanding the timing of sexual debut is critical for informing sexual and reproductive health interventions. We investigated sexual behavior and early sexual debut among Rwandan youth.

METHODS

We conducted a cross-sectional analysis of data from a cluster-randomized trial with 6079 students ages 12-19 years in Rwanda. We examined predictors of early sexual debut (<15 years) using logistic regression to estimate odds ratios and factors associated with the timing of first sex using Cox models to estimate hazard ratios. Interpretations of sex were also explored.

RESULTS

Participants were 15 years and 51.5% female on average; 1723 (28.3%) reported sexual activity. Among the 1320 participants who provided an age of sexual debut, 51.4% reported sex at ≤12 years and 75.7% at<15 years. Males had a higher odds of early sexual debut (adjusted odds ratio: 2.40; 95% CI: 1.99, 2.90) and a higher hazard of sex occuring at an earlier age than females (adjusted hazard ratio: 1.91; 95% CI: 1.67, 2.20). One-third of participants considered "sexual intercourse" to include kissing, touching, or masturbation.

CONCLUSIONS

Sex at ≤12 years was frequently reported, indicating that interventions facilitating access to youth-friendly sexual and reproductive health services are necessary before age 12. Validation studies are needed to evaluate how interpretations of sexual intercourse influence the assessment of sexual activity.

CLINICAL TRIAL

NCT04198272.

Prevalence and predictors of premarital sexual intercourse among young women in sub-Saharan Africa

INTRODUCTION

Premarital sexual intercourse (PSI) without adequate information and/or appropriate application of the relevant knowledge about sex before marriage, potentially has adverse effects on the sexual and reproductive health outcomes of vulnerable young women in sub-Saharan Africa (SSA). This study sought to examine the prevalence and predictors of PSI among young women aged 15-24 in SSA.

METHODS

Nationally representative cross-sectional data from 29 countries in SSA were extracted for the study. A weighted sample size of 87,924 never married young women was used to estimate the prevalence of PSI in each country. A multilevel binary logistic regression modelling approach was used to examine the predictors of PSI at p < 0.05.

RESULTS

The prevalence of PSI among young women in SSA was 39.4%. Young women aged 20-24 (aOR = 4.49, 95% CI = 4.34, 4.65) and those who had secondary/higher educational level (aOR = 1.63, 95% CI = 1.54, 1.72) were more likely to engage in PSI compared to those aged 15-19 and those with no formal education. However, young women who belonged to the Islamic religion (aOR = 0.66, 95% CI = 0.56, 0.78); those who were working (aOR = 0.75, 95% CI = 0.73, 0.78); belonged to the richest wealth index (aOR = 0.55, 95% CI = 0.52, 0.58); were not exposed to radio at all (aOR = 0.90, 95% CI = 0.81, 0.99); were not exposed to television at all (aOR = 0.50, 95% CI = 0.46, 0.53); resided in rural areas (aOR = 0.73, 95% CI = 0.70, 0.76); and those who were living in the East African sub-region (aOR = 0.32, 95% CI = 0.29, 0.35) were less likely to engage in PSI compared to those who were traditionalist, unemployed, belonged to the poorest wealth index, exposed to radio frequently, exposed to television frequently, resided in urban areas, and lived in the Southern Africa sub-region, respectively.

CONCLUSION

Sub-regional variations in the prevalence of PSI exist amidst multiple risk factors among young women in SSA. Concerted efforts are required to empower young women financially, including education on sexual and reproductive health behaviors such as the detrimental effects of sexual experimentation and encouraging abstinence and/or condom use through regular youth-risk communication advocacy.

Is the mortality-fertility nexus gendered? A research note on sex differences in the impact of sibling mortality on fertility preferences

Research guided by demographic transition theory has shown that exposure to mortality influences women's fertility preferences and behaviours. Despite the myriad contexts, methodological approaches, and linkages featured in past studies, they have shared a focus on women, leaving questions on the gendered salience of mortality exposures for adults' fertility-related outcomes unanswered. In this research note, we analyse data from three African countries with distinct fertility profiles (Nigeria, Zambia, and Zimbabwe) to examine associations between sibling mortality exposure and ideal family size among women, men, and couples. We also investigate the stability of these associations over time. The associations between adults' sibling mortality exposure and their own and their spouses' ideal family sizes vary across countries. However, the gendered nature of the results in every country and evidence of cross-spousal effects uniformly demonstrate the need to incorporate sex differences into the study of the mortality-fertility link.

The effect of interviewer-respondent age difference on the reporting of sexual activity in the Demographic and Health Surveys: Analysis of data from 21 countries

Background

Interviewer effects can have consequential impacts on survey data, particularly for reporting sensitive attitudes and behaviours such as sexual activity and drug use, yet these effects remain understudied in low- and middle-income countries. The Demographic and Health Surveys (DHS) present a unique opportunity to study interviewer effects on the self-report of sensitive topics in low- and middle-income countries by including interviewer characteristics data. This paper aims to narrow the gap in research on interviewer effects by studying the effects that age difference between interviewer and respondent and interviewer survey experience have on the reporting of ever having sexual intercourse.

Methods

We used DHS data from 91 066 women and 56 336 men in 21 countries where the standard DHS was implemented among all women of reproductive age, and interviewer characteristics were included in the data set. Using a Bayesian cross-classified model with random intercepts for interviewer and cluster, we assessed whether the effect of an age difference of 10 years or greater was associated with a difference in self-report of ever having sexual intercourse, adjusting for respondent demographics.

Results

There was a meaningful association between an age difference of greater than ten years and reporting of ever having had sexual intercourse in most countries for both genders after adjusting for interviewer age and experience, rural or urban cluster, and individual-level characteristics. Among women, the marginal posterior probability of reporting ever having sexual intercourse if the interviewer was ten years or more years older was lower for 17 of 19 countries (countries ranged from -12.50 to 3.90 percentage points). Among men, the marginal posterior probability was lower for 16 of 20 countries, ranging from -18.30 to 17.10 percentage points.

Conclusions

In most countries, women and men were less likely to report ever having sexual activity if the interviewer was ten or more years older than them, adjusting for potential confounders. These findings have important implications for interpreting numerous sexual health indicators, such as unmet family planning needs and human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS) risk. Survey administrators may consider more careful interviewer-respondent characteristic matching or novel approaches like Audio Computer Assisted Self Interview to minimize interviewer-induced variance.

Adolescent pregnancy outcomes in Jos, North Central Nigeria: The roles of disclosure and social support systems

Adolescent pregnancy is mostly unintended and an indicator of unmet sexual and reproductive health (SRH) needs. In most African cultures, sociocultural and religious expectations of chastity make unintended adolescent pregnancy a traumatic experience. This study examined the roles of disclosure and social support networks in determining adolescent pregnancy outcomes in Jos, Nigeria. Using a qualitative design, we conducted in-depth interviews with 17 young persons aged 16-24 years, recruited through purposive and snowballing sampling methods. Data were analysed using an inductive approach. Informal social support networks, mainly mothers and close friends, played prominent roles in pregnancy disclosure. The fear of unsafe abortion complications and lack of other options forced most participants into early motherhood. Parenting issues also contributed to unintended adolescent pregnancies. Participants noted that adolescent males had better access to contraceptive devices like condoms. Additionally, the absence of formal opportunities for institutional support through education and youth-friendly SRH services constituted barriers to preventing unintended adolescent pregnancies. Considering the important role family plays, preventing unintended adolescent pregnancies requires empowering parents on SRH communication. A gender-based approach to adolescent-friendly SRH services is recommended. The Nigerian government needs to reconsider how to provide contextually-acceptable comprehensive sexuality education to young people.

Determinants of age at first sex inequality between women and men youth in Uganda: A decomposition analysis

INTRODUCTION

Teenage pregnancies and sexually transmitted diseases are major public health problems in Uganda. Early sexual debut is one of the main routes of these public health problems. This study aimed to identify factors that explain age at first sex inequality between men and women Ugandan youth.

METHODS

This study used secondary data from a cross-sectional Uganda demographic health survey (2016). Participants were 10 189 sexually experienced youth. Using Stata 14, intermediary analysis was done to assess the statistical association between explanatory variables and age at first sex in a multiple logistic regression analysis. Oaxaca decomposition was used to decompose factors that explain inequalities in age at first sex between men and women youth.

RESULTS

Intermediary results showed Islam, many household members, residing in the eastern region, and being divorced/widowed were predictors of early age at first sex. While secondary education, higher education, blue-collar jobs, and being 20 to 30 years old were protective factors against early age at first sex. Material, behavior/cultural, psychosocial, and demographic explanatory factors jointly explained a statistically significant portion of the observed gap in early age at first sex between women and men youth. More women were at a disadvantage at an early age at first sex compared to men youth. About 96.37% of this gap was explained by unequal distribution of material, behavior/cultural, psychosocial, and demographic factors between men and women youth. Relationship to household head (49%), education (16.87%), occupation (8,94%), number of household members (8.57%), using the internet (7.99%), and reading newspapers or magazines (4.39%) made a significant contribution to the explanation of early age at first sex inequality between men and women youth.

CONCLUSIONS

Results showed early age at first sex inequality between women and men youth that favored men. Programs designed to address early age at first sex and related health outcomes must combat inequities in education, employment opportunities, access to sexual reproductive information through internet, and newspapers or magazines between men and women youth. They should also foster household relationships and monitor girls.

Influences of parental monitoring and school connectedness on age at first sexual debut among unmarried female youth in Bedele town, Ethiopia: A survival analysis of timing using accelerated failure time model

Background

The age of first sexual debut among youth continues to attract interest as it marks the start of their exposure to a variety of sexual and reproductive health problems. Parental monitoring (PM) and school connectedness (SC) has been found to have an effect on this problem. Despite this fact, there is a dearth of literature on implications of PM and SC on age at first sexual debut in Ethiopia. Therefore, this paper examined the influences of PM and SC age at first sexual debut among female youth.

Methods

A retrospective follow-up study was conducted on 470 randomly selected female youth in Bedele town, Oromia regional state, southwest Ethiopia from February 1 to March 30, 2021. The age at first sexual debut was asked in full years for respondents who ever engaged in sexual debut at a time of data collection. Data were entered using Epi-Data version 4.6 and analyzed using Stata version 14. All variables at P-values less than 0.2 in bivariable analysis were exported to multivariable analysis. Multivariable Accelerated Failure Time (AFT) regression analyses using Weibull distribution were used to examine the association of age at first sexual debut with PM and SC at 5% level of significance.

Results

Overall, 132(28.1%) youths were begun sexual activities of which 79.54% was an early (vaginal penetrative sex before 18 years old). The incidence rate was 15.58/1000 PY with 95% CI of [13.14, 18.47]. The result shows that, female youth start first sexual debut as early as 10 year and mean age was 16.89±2.82. Only 27.97% of those who began sexual debut used contraception during first sex. Multivariable Weibull AFT regression analyses adjusted for different variables showed that high PM (Adjusted Time Ratio (ATR) 1.13: 95%CI; [1.04, 1.21]) and good SC (ATR: 1.14: 95% CI; [1.06, 1.22] significantly delays the age at first sexual debut.

Conclusions

Overall, four out of every five premarital sexual activities were early sexual debuts. High PM and high SC significantly decrease early sexual debut by delaying the age of sexual initiation. Therefore, family and school involvement focused on PM and SC of the youth is recommended as an important mechanism for preventing youths’ risky sexual behaviour, including early sexual debut.

Prevalence and associated factors of early sexual initiation among female youth in East Africa: further analysis of recent demographic and health survey

BACKGROUND

Early sexual initiation is one of the risky sexual practices. Early sexual beginning is associated with an increased risk of HIV/AIDS, sexually transmitted infections (STIs), unexpected pregnancies, unsafe abortion, premature deliveries, and psychosocial issues. However, there is still a lack of evidence, particularly in East Africa, where community-level factors are not investigated. Therefore, this study aimed to estimate the pooled prevalence and to identify associated factors of early sexual initiation among female youth in Eastern Africa.

METHODS

A total weighted sample of 49,716 female youth was included in this analysis. STATA version 14 software was used for data extraction, recoding, and analysis. A multilevel binary logistic regression model was fitted to identify determinants of early sexual initiation in the region. Finally, Adjusted Odds Ratio (AOR) with a 95% Confidence Interval (CI) was reported to declare the factors that are significantly associated with early sexual initiation.

RESULT

The prevalence of early sexual initiation in East Africa was 21.14% [95% CI: 20.00%, 21.50%]. In the multivariable multilevel analysis; being age 20-24 years [AOR = 0.65: 95% CI; 0.61, 0.69], primary [AOR = 0.73: 95% CI; 0.67, 0.78], secondary &above education [AOR = 0.30: 95% CI; 0.27,0.33], married [AOR = 1.85: 95% CI; 1.73,1.97], middle wealth [AOR = 0.78: 95% CI; 0.72,0.84], richest [AOR = 0.74: 95% CI; 0.68,0.80], and reading newspaper [AOR 0.77: 95% CI;0.71,0.83] were significantly associated with early sexual initiation.

CONCLUSION

The study revealed that early sexual initiation among female youth was high in East Africa. Educational status, respondent age, marital status, wealth index, age at first cohabitation, contraceptive use, reading newspaper, and place of residence were associated with early sexual initiation. Therefore, the survey findings will help policymakers, as well as governmental and non-governmental organizations, design the most effective interventions. Moreover, strengthening information, education, and wealth status are important intervention areas to delay the age of early sexual debut.

Optimization of a protocol for the evaluation of antibody responses to human papillomavirus (HPV) vaccination in low-resource settings

Introduction

Available human papillomavirus (HPV) vaccines could have an important primary role in cervical cancer prevention once their long-term immunogenicity and safety are evaluated at the population level. The aim of this study was to optimize an assay to be used in evaluating the long-term durability of HPV vaccine response following a pilot vaccination of adolescent girls in Ghana.

Methods

A rapid, high-throughput, indirect enzyme-linked immunosorbent assay (ELISA) was optimized for the detection and quantitation of anti-HPV L1 (late expression protein: types 6, 11, 16 and 18) immunoglobulin G (IgG) in human serum (n = 89). The utility of the assay was demonstrated using serum collected from a cohort of pre-adolescent girls (n = 49) previously vaccinated with a quadrivalent vaccine and non-immune serum obtained from age-matched controls (n = 40).

Results

The assay showed good discrimination of antibody levels between cases and control sera: seroprevalence of anti-HPV IgG antibodies was significantly higher among vaccinated than unvaccinated girls for both HPV-16 (63.3% vs. 12.5%; p < 0.001) and HPV-18 (34.7% vs. 20.0%; p = 0.042), respectively. Thirty-six months after receiving the third dose of vaccine, significantly higher mean anti-HPV-16 (0.618 vs. 0.145), anti-HPV-18 (0.323 vs. 0.309), and anti-HPV-6 (1.371 vs. 0.981) antibody levels were measured, compared to unvaccinated girls (all p < 0.05). A correlation between optical density and antibody activity indicated assay sensitivity to increasing levels of antibody activity.

Conclusion

We have successfully optimized and implemented a robust and sensitive assay for the evaluation of antibody responses among immunized adolescent girls for monitoring future large-scale HPV vaccination studies in low-income settings. Our results demonstrated greater immunoglobulin G antibody activity within serum drawn from adolescent girls immunized 36 months prior.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12905-022-01821-y.

Effects of economic support, comprehensive sexuality education and community dialogue on sexual behaviour: Findings from a cluster-RCT among adolescent girls in rural Zambia

Adolescent girls in Sub-Saharan Africa are at high risk of poor sexual and reproductive health outcomes. We present findings from a cluster-randomised trial in rural Zambia on the effects of economic support, comprehensive sexuality education (CSE) and community dialogue on sexual activity, contraceptive use and beliefs among adolescent girls. We recruited 157 schools in 2016, and all girls in grade 7 were invited to participate. Schools were randomised to either economic support, combined economic support, CSE and community dialogue, or control. Economic support consisted of unconditional cash transfers to girls and their guardians, and payment of school fees for girls continuing to grades eight and nine. CSE and community dialogue meetings focused on practices around girls' fertility, marriage and education. The interventions lasted two years from 2016 to 2018, with follow-up for another two years. The effects on outcomes were measured in 2018 and 2019 and compared using generalised estimating equations. We found that economic support lowered sexual activity (risk ratio (RR) 0.70; 95% C.I. 0.54 to 0.91), with a small added benefit of CSE and community dialogue. Economic support and the additional CSE and community dialogue were effective in lowering unprotected sexual activity (RR 0.53 for combined support vs. control; 95% C.I. 0.37 to 0.75). There was no evidence of intervention effects on contraceptive use among those ever sexually active, but the addition of CSE and community dialogue improved contraceptive use among those recently sexually active (RR 1.26; 95% C.I. 1.06 to 1.50) and knowledge regarding contraceptives (RR 1.18; 95% C.I. 1.01 to 1.38) compared to economic support alone. Perceived community support regarding contraceptives was lower in both intervention arms compared to the control. These findings indicate that economic support in combination with CSE and community dialogue can improve the sexual and reproductive health of adolescent girls.

Sexual Debut Among Heterosexual Men of African and Caribbean Descent: Are the Youth Initiating Sex Earlier than the Older Generation?

Although age at first sex is considered a measure of sexual risk and vulnerability for HIV infection, there is a dearth of literature on age at sexual debut in the Canadian context. This study examined time variations to first sex among heterosexual African, Caribbean, and Black (ACB) men in four Ontarian cities. A population-based retrospective survey (n = 879) on timing to first sexual intercourse was conducted between 2018 and 2019 among self-identified heterosexual ACB men 16 years or older and residing in London, Ottawa, Toronto or Windsor. We used the lognormal survival analysis technique to examine variations in time to first sexual intercourse among age cohorts and between cities. The findings showed a generational shift in the pattern of sexual initiation, with younger heterosexual ACB men initiating sexual intercourse earlier compared with those currently older than 50 years. We observed those between 16 and 19 years, 20 and 29 years, and 30 and 39 years of age to have significantly higher risk ratios of TR = 0.852, TR = 0.869, and TR = 0.855, respectively. At city level, the results show marked spatial variations, with youth in cities of Toronto, Ottawa, and London at the highest risk of early sexual debut relative to those in Windsor. Early initiation of first sexual intercourse among heterosexual ACB youth was observed with those in the larger cities being at a relatively higher risk. There is the need for programs aimed at delaying sexual debut among youth in general. It is, however, important to recognize the relative risk of those in the larger cities.

Factors associated with age of first sex among women screened for an observational contraceptive vaginal ring study in Kisumu, Kenya, 2014

Sex at an early age can have later life negative health outcomes. Insights on early sexual activity may help in the development of future health-promotion products and interventions related to pregnancy and sexually transmitted infections (STIs) prevention. Among Kenyan women participating in a contraceptive vaginal ring study, we determined: (1) the proportion with first sex at ≤15 years (early sex) and (2) factors associated with early sex. Baseline data collection and testing for pregnancy, STIs, and HIV were undertaken. A log-binomial or a modified Poisson regression was used to estimate univariable prevalence ratios and multivariable adjusted prevalence ratios (aPRs). Among 332 women aged 18-34 years, the median age of first sex was 16 years, with 40.1% experiencing early sex. Overall, 29.8% reported an older first sex partner (≥5 years); 83.9% indicated lack of readiness or intentions at first sex; and 56.2% received money, gifts, or favors as part of first sex. Early sex was more prevalent among inherited widows (a Luo cultural practice, aPR 1.49), gift recipients (aPR 1.38), women with a forced/unwanted sex history (aPR 1.42), or those with a partner of unknown or positive HIV status in the past 3 months (aPR 1.45). Sex before or at the age 15 may be associated with higher sexual risk behaviors. Complex power and gender relations may additionally influence exposure to sexual risk in our research setting.

Changing gender gaps in the timing of first union formation and sexual initiation in sub-Saharan Africa

Gender differences in union formation and sexual initiation in sub-Saharan Africa remain poorly documented, in large part due to a scarcity of research on the transition to adulthood among men. We adopt a novel perspective on this topic by examining gender gaps in the ages at first union and sex in 24 countries, focusing on measures of central tendency and dispersion. Gender differences in age at first union decreased, driven by postponement among women with relatively late union formation. Yet, due to concurrent persistence of early unions among a sizable portion of women's populations, within-country heterogeneity in ages at first union increased substantially among women. Thus, although forces responsible for earlier union formation among women than men are weakening, these changes affect population strata unequally. Gender differences in age at first sex decreased to a lesser extent, but in some countries, they disappeared or reversed, uncovering a shift in the relationship between gender and timing of sexual initiation. Changes in union formation and sexual initiation are more heterogeneous across countries among men than women, indicating that these processes among men are more context specific. We show importance of studying men's behavior and exploring heterogeneity in union formation and sexual initiation both within and between populations of women and men.

Social and Behavioral Correlates of Adolescent Sexual Experience and Intention to Use Condoms in Northwestern Botswana

Adolescent sexual behavior is shaped by individual, social, and structural factors that can increase HIV-risk, unwanted pregnancy, and sexually transmitted disease. To inform the development of a comprehensive sexuality education program, 239 secondary school adolescents ages 14–19 in Maun, Botswana, completed a survey of sexual and reproductive health knowledge, attitudes, and behaviors in February–March 2020. Bivariate and multivariate analyses examined factors associated with sexual experience and perceived ability to insist on condoms. Approximately 21% of respondents reported having had sexual intercourse. More than half felt able to insist on condoms. Sources of information about human reproduction, alcohol use, attitudes about when sex is acceptable, and perceived sexual activity by one’s peers were predictive of sexual experience. Age, confidence in correct condom use, perceived acceptability of adolescent sex with condoms, and endorsement of prevailing gender norms were significantly associated with perceived ability to insist on condom use.

Multiple realities around sexual and reproductive health and rights (SRHR) among adolescents in Ghana

The multiple realities around the sexual and reproductive health of Ghanaian adolescents are explored in this paper. Female and male adolescents (aged 10-19 years, N=298) participated in 40 focus group discussions in 20 communities. A comparative inductive approach has been used to present, analyse and document the sexual and reproductive realities of adolescents in their communities. The findings reveal commonalities as well as differences in the realities among participants. Common realities, regardless of age and sex, were teenage pregnancy and abortion, sexual violence (defilement, rape and coercive sex) and parental neglect. These aside, there were divergent realities for older adolescent girls in particular, e.g. lack of access to contraceptives and understanding of the fertility cycle, and the influences and pressures of social media and varied notions about sexual harassment between female and male adolescents. The findings, overall, underscore the complexity and nuanced lives of adolescents in traversing the sexual and reproductive maturation processes. These events unfold in communities where adolescents are 'required' to be silent and 'play' innocent regardless of their daily struggles, compounded by limited opportunities to learn and unlearn embedded norms about sexual and reproductive functioning. Some implications for sexual health promotion programmes are outlined.

Empirical linkages between female genital mutilation and multiple sexual partnership: evidence from the 2018 Mali and 2013 Sierra Leone Demographic and Health Surveys

Female genital mutilation (FGM) is very pervasive in Africa, with significant regional variations in the prevalence of this traditional practice. This study examined the linkages between FGM and multiple sexual partnership in Mali and Sierra Leone - two African countries with a high prevalence of FGM. Data were from the 2018 Mali and 2013 Sierra Leone Demographic and Health Surveys, and the study sample comprised 4750 women from Mali and 16,614 from Sierra Leone. Multilevel logistic regression was used for the data analysis, with reported adjusted odds ratios (aOR) and associated 95% confidence intervals. In Mali, women who had not undergone FGM were less likely to have multiple sexual partners (aOR=0.60, CI=0.38-0.96) compared with those who had undergone FGM. In Sierra Leone, women who had undergone FGM (aOR=1.15, CI=1.02-1.30) were more likely to have multiple sexual partners compared with those who had not undergone FGM. Age, level of education, wealth quintile, sex of household head, community socioeconomic status, mass media exposure, and community literacy level were found to be associated with the likelihood of multiple sexual partnership among women in Mali and Sierra Leone. Comprehensive, age-group-based risk-reduction strategies, such as abstinence education and decision-making skills (assertiveness) training, are needed to reduce girls' and young women's engagement in multiple sexual partnerships. Policy interventions, such as anti-FGM legislation and initiatives like the 'Schooling for the Female Child' initiative aimed at reducing social inequality among girls and women, might help decrease FGM and the likelihood of health-compromising behaviours like multiple sexual partnership.

Changes in contraceptive and sexual behaviours among unmarried young people in Nigeria: Evidence from nationally representative surveys

Context

Nigeria is a high-burden country in terms of young people’s health. Understanding changes in young people’s sexual and reproductive health (SRH) behaviours and the associated factors is important for framing appropriate interventions.

Objective

This study assessed changes in SRH behaviours of unmarried young people aged 15–24 and associated factors over a ten-year period in Nigeria.

Data and method

We analysed datasets from Nigeria Demographic and Health Surveys of 2008, 2013 and 2018 to assess changes in inconsistent condom use, non-use of modern contraceptives; multiple sexual partnership; and early sexual debut. Using binary logistic regression, we assessed the association of selected variables with the SRH behaviours.

Results

Over four-fifths of unmarried young people (15–24) in Nigeria engaged in at least one risky sexual behaviour in each survey year. The pattern of changes in the four risky SRH behaviours was consistent over the 10-year period, with the highest rates of each behaviour occurring in 2018 while the lowest rates were in 2013, thus indicating an increase in the proportion of respondents engaging in risky sexual behaviours over the study period. Comprehensive HIV/AIDS knowledge, male gender, older age category (20–24), residence in south-west Nigeria, urban residence, higher socio-economic status, secondary/higher education were mostly protective against the four SRH variables analysed across the different data waves.

Conclusion

Addressing the high and increasing level of risky SRH behaviours among young people in Nigeria is imperative to improve overall national health status and to ensure progress towards achieving SDG target 3.7 focusing on SRH.

Social Capital and Age at Sexual Debut: Race Differences in South Africa

Literature on social capital has long considered whether and how social capital is protective against various risk behaviors, including age at sexual debut. However, much of this literature uses data from wealthy countries in the Global North and is often cross-sectional, dampening generalizability. In this paper, we employ longitudinal South African data from adolescents in the Cape Area Panel Study to examine the longitudinal link between social capital and age at sexual debut. We first examine the overall relationship between age at sexual debut and social capital and then examine how the relationship differs by race. Results suggest that, on average, each additional activity is associated with an approximate 2 month delay in age at sexual debut. However, we observed steep racial differences. For Africans, the link between social capital and age at sexual debut was not significant, while the results for Coloureds and Whites were. For Coloureds, each additional activity translated into a 3 month delay in sexual debut, while for Whites we found a 4 month delay. We found no evidence of sex differences. Taken together, these results suggest that social capital is not equally efficacious for all South African adolescents. For Africans, social capital does not appear to be linked to age at sexual debut. In contrast, more social capital activities appear to be linked to delayed sexual debut, most particularly for Whites.

Early sexual debut: A multi-country, sex-stratified analysis in sub-Saharan Africa

This study examined outcomes associated with early sexual debut in five sub-Saharan African countries for males and females, separately. We employed Violence Against Children Surveys (VACS) from Kenya, Malawi, Nigeria, Tanzania, and Uganda, restricting samples to males and females age 18-24 years. Early sexual debut was defined as having one's first sexual intercourse before 15. Logistic, Ordinary Least Squares, and Poisson regressions were utilised to estimate associations between early sexual debut and outcomes across four ecological domains: individual, family, peer/partner, and community. Regressions were stratified by sex. The prevalence of early sexual debut ranged from 8.6% in Tanzania to 17.7% in Malawi. Males were more likely to report early sexual debut in Kenya (16.3%, compared to 6.7% for females; P < 0.001) and Uganda (15%, compared to 10.4% for females; P = 0.037). In Nigeria, 14.5% of females reported early sexual debut, compared to 5.4% of males (P < 0.001). Early sexual debut was associated with only one outcome in the individual and family domains, and was most consistently associated with outcomes in the peer/partner domain. Differences in these relationships for males and females suggest programs and policies working to reduce early sexual debut and promote healthy sexual relationships among young adolescents should thoughtfully consider framing messaging through a gendered lens.

Sexual and reproductive rights violations at sexual debut of male and female adolescents in Ghana

OBJECTIVE

To examine the social and ethical challenges in enforcing sexual and reproductive rights of male and female adolescents abused at sexual debut in Ghana.

METHODOLOGY

This was a secondary analysis of cross-sectional survey data on 278 sexually experienced male and female teenagers from 12 communities selected by cluster random sampling in the Ejisu-Juben district. We extracted relevant data from a 2009 academic thesis project involving 481 respondents. We assessed differences between sexual debut experiences of males and females using Pearson's chi-square and ANOVA tests. P-values ≤0.05 were considered significant.

RESULTS

Mean ages at sexual debut for males and females were 16.05 ± 1.8 and 15.98 ± 1.47 years respectively (P=0.719). Adolescents of both sexes experienced defilement and forced sexual debut; similar proportions had early sexual debut. Females who had early sexual debut were more likely than their older counterparts to have low educational attainment and induced abortion.

CONCLUSIONS

Many male and female adolescents experience sexual and reproductive rights breaches at sexual debut. Prevailing circumstances hinder optimization of sexual and reproductive rights of juveniles in Ghana. We recommend making clear provisions for young persons in the law on sexual offences in the criminal code to facilitate development of interventions to improve access to justice for offenders and victims.

Protective sexual behaviours among young adults in Nigeria: influence of family support and living with both parents

Background

Many studies have focused on risky sexual behaviour among adolescents and young adults; however, literature on protective sexual practices among this age cohort is still evolving. Since young adults are disproportionately burdened by sexually transmissible infections, including HIV, understanding factors that influence protective sexual behaviour among the age group is crucial in developing age-appropriate interventions. Drawing from a cross-sectional survey conducted among adolescents and young adults in two Nigerian universities, we examined gender differences in protective sexual behaviours and the influence of family support and living with both parents on these behaviours.

Methods

A total of 800 male and female university students in two Nigerian universities were recruited using stratified random sampling between February and April 2018. Analysis was, however, based on 599 participants aged between 15 and 24 . Adjusted and unadjusted multinomial logistic regression models were used to examine the influence of family support, and living with both parents on protective sexual behaviours at a 95% confidence interval.

Results

Findings show that the largest proportion of our participants engaged in protective sexual behaviours. We found no gender differences in protective sexual behaviours, including sexual abstinence, consistent condom use, and sexual fidelity. Family support and living with both parents were positively associated with protective sexual behaviours among adolescents and young adults.

Conclusion

This study found that a majority of adolescents and young adults in Nigerian Universities engage in protective sexual behaviours. Adequate family support and living with both parents are positively associated with protective sexual behaviours. The study however revealed that about one-fifth of our participants engaged in high-risk sexual behaviour. This suggests a need for behavioural change interventions, provision of sexual health services and empowerment of students who receive inadequate family support.