Age of sexual debut among US adolescents

Earlier sexual debut as a risk factor for substance use among men who have sex with men (MSM) in Kazakhstan

Background

Limited research have examined predictors of illicit use of drugs and binge drinking among gay, bisexual, and other men who have sex with men (MSM) in Kazakhstan and Central Asia. This study examines earlier sexual debut as a risk factor for lifetime and recent substance use behaviors among MSM in Kazakhstan.

Methods

We conducted a secondary analysis of self-reported data from a NIDA-funded HIV prevention trial including 902 adult cisgender MSM in Kazakhstan who completed structured screening interviews. Logistic regression models were used to estimate associations between earlier sexual debut (ages 16 and older as the reference group) and lifetime and recent substance use, with covariance adjustment for sociodemographic characteristics.

Results

The majority of MSM in our sample reported lifetime binge drinking behavior (73%) and illicit use of drugs (65%). Participants with an earlier sexual debut before 13 years old had significantly higher odds of lifetime binge drinking and any illicit use of drugs (aOR= 2.3, 95%CI: 1.2-4.5; aOR=3.0, 95%CI: 1.6-5.8). MSM who reported an earlier sexual debut between 13-15 years old had significantly higher odds of lifetime binge drinking and illicit use of any drugs (aOR=1.6, 95%CI: 1.1-2.3; aOR=1.6, 95%CI: 1.1-2.3); as well as recent binge drinking behavior (aOR=1.6, 95%CI: 1.2-2.3).

Conclusion

Future research should examine pathways between earlier sexual experiences and substance use behaviors among sexually diverse populations. Earlier sexual experiences during childhood and adolescence may be relevant contextual information for interventions aimed at substance use risk prevention, treatment, and recovery among MSM populations.

Assessing the Validity of the Social Impact Scale Among a Longitudinal Cohort of Adolescents and Young Adults Living With Perinatally Acquired HIV

BACKGROUND

With few psychometrically evaluated HIV-related stigma measures for adolescents and young adults living with HIV, we examined the developmental applicability (ie, validity) of 2 subscales of the commonly used stigma measure, the Social Impact Scale, among a cohort of adolescents and young adults with perinatally acquired HIV.

SETTING

Data were obtained from a New York City longitudinal study (N = 340). This study primarily comprised Black and Latinx adolescents and young adults with either perinatally acquired HIV or those with perinatal exposure but who are uninfected. Data for this analysis were obtained from the population with perinatally acquired HIV and spanned approximately a 15-year survey period (2003-2018).

METHODS

A confirmatory factor analysis was used at 7 time points to assess whether the Social Rejection and Internalized Shame subscales were consistent in this cohort over time. Overall and individual Cronbach alphas were reported to show the strength of the internal consistency.

RESULTS

The mean age from baseline to follow-up 6 ranged from 12 to 23 years over the study period. The Social Rejection subscale was acceptably valid across follow-up periods with strong factor loadings and Cronbach alphas higher than 0.70. However, the Internalized Shame subscale was less valid among younger adolescents. Starting at follow-up 2, we observed better validity with the Internalized Shame subscale performance.

CONCLUSION

Future research must consider mechanisms for developing and adapting measures from a developmental perspective to best measure the experiences of HIV-related stigma among younger populations.

Human Papillomavirus Vaccine Completion by 13: A Quality Improvement Initiative in a Large Primary Care Network

OBJECTIVE

Fewer than 40% of U.S. children complete the human papillomavirus (HPV) vaccine series before their 13th birthday. In our large pediatric primary care network, HPV vaccine completion rate by age 13 was 30%. We hypothesized that a phased quality improvement (QI) initiative would increase rates of HPV vaccine completion by age 13 across our network.

METHODS

This QI initiative was conducted in a network of 30 practices located across two states, in urban and suburban settings, consisting of teaching and non-teaching clinics, and ranging in size from three to 50 providers per office. We used a phased approach incorporating multicomponent network-wide and iterative practice-specific interventions. Key interventions included: updating clinical decision support to default order HPV vaccine due at preventive visits starting at age nine instead of 11, data audit and feedback to providers and practices, encouraging use of a strong provider recommendation, and standing orders.

RESULTS

From April 2019 to October 2022, HPV vaccine completion by age 13 across our network increased from 30% to 55% and met criteria for special cause variation on statistical process control charts. A gap in median HPV vaccine completion by age 13 between patients with public insurance and patients with private or commercial insurance decreased from 9% to 1%.

CONCLUSION

A QI initiative was associated with a sustained increase in HPV vaccine series completion by age 13 and reduced variation in care across a large network of 30 primary care practices.

Sexually transmitted infections and dating app use

Incidence of sexually transmitted infections (STIs) is rising sharply in the United States. Between 2014 and 2019, incidence among men and women has increased by 62.8% and 21.4%, respectively, with an estimated 68 million Americans contracting an STI in 2018.a Some human behaviors impacting the expanding STI epidemic are unprotected sex and multiple sexual partners.b Increasing dating app usage has been postulated as a driver for increases in the numbers of people engaging in these behaviors. Using the proposed model, it is estimated that both STI incidence and prevalence for females and males have increased annually by 9%-15% between 2015 and 2019 due to dating apps usage, and that STI incidence and prevalence will continue to increase in the future. The model is also used to assess the possible benefit of in-app prevention campaigns.ahttps://www.cdc.gov/nchhstp/newsroom/fact-sheets/std/STI-Incidence-Prevalence-Cost-Factsheet.htmbA. N. Sawyer, E. R. Smith, and E. G. Benotsch. Dating application use and sexual risk behavior among young adults. Sexuality Research and Social Policy, 15:183-191, 2018.

Prevalence and factors associated with adolescent pregnancy among sexually active adolescent girls in Peru: Evidence from Demographic and Family Health Survey, 2015-2019

Background

The objective of this study was to estimate the prevalence of adolescent pregnancy among sexually active adolescents, and identify the factors associated with this problem.

Methods

A population-based analytical cross-sectional study was conducted using pooled data from the Demographic and Family Health Surveys of Peru, 2015-2019. A total sample of 8850 adolescent girls aged 12 to 19 years who reported a history of sexual intercourse were included. To identify factors related to adolescent pregnancy, the study employed adjusted prevalence ratios (aPR) with 95% confidence intervals (95% CI). The aPR were obtained from a multivariable logistic regression model.

Results

The prevalence of adolescent pregnancy among sexually active adolescents in Peru was 30.9% (95%CI: 29.4-32.4%). In the multivariable analysis; being 17-19 years (aPR: 1.48; 95%CI:1.33-1.64), being married or cohabitant (aPR: 4.01; 95%CI: 3.48-4.61) and belonging to the Quechua ethnicity group (aPR: 1.16; 95%CI: 1.07-1.25), were associated with a higher prevalence. Conversely, the following factors were associated with a lower prevalence of pregnancy: being employed (aPR: 0.81; 95%CI: 0.76-0.86), being currently studying (aPR: 0.43; 95%CI: 0.38-0.49), belonging to the second (aPR: 0.91; 95%CI: 0.85-0.97), third (aPR: 0.81; 95%CI: 0.74-0.89), fourth (aPR: 0.79; 95%CI: 0.69-0.91) and fifth (aPR: 0.59; 95%CI: 0.47-0.75) wealth quintile, initiating sexual relations in middle adolescente (aPR: 0.76; 95%CI: 0.69-0.83) or late adolescence (aPR: 0.40; 95%CI: 0.35-0.46), perceiving a future pregnancy as a problem (aPR: 0.77; 95%CI: 0.72-0.83) and having knowledge of the moment in the cycle when pregnancy can occur (aPR: 0.84; 95%CI: 0.77-0.92).

Conclusions

Approximately three out of ten adolescents who initiated a sexual life had at least one pregnancy. Age, marital status, employment, education, wealth, ethnicity, age at first intercourse, knowledge of when in the cycle she may become pregnant, and perception of future pregnancy were associated with adolescent pregnancy. To decrease the prevalence of teenage pregnancy in Peru, it is imperative to enhance national policies concerning family planning and provide comprehensive sex education targeted at adolescents.

Would Caring Teachers Buffer the Link Between Violence Victimization and Early Sexual Initiation? Comparing Heterosexual and Non-Heterosexual African American Youth

This study investigated the relationship between youth violence exposures (i.e., peer and neighborhood) and early sexual initiation. It also explored whether caring relationships with teachers might moderate this relationship and whether results differed for heterosexual versus non-heterosexual African American youth. The study sample (N = 580) comprised 475 heterosexual and 105 non-heterosexual youths, 319 female and 261 male, ages 13 to 24 years (M age = 15.8). Students were assessed for peer and neighborhood violence, relationship with teachers, early sexual initiation, sexual orientation, and socioeconomic status. Major results indicated a positive relationship between exposure to peer and neighborhood violence and early sexual initiation for heterosexual youth but not those who identified as non-heterosexual. Further, identifying as female (vs. male) was significantly associated with later sexual initiation for both heterosexual and non-heterosexual youth. In addition, caring teachers moderated the relationship between exposure to peer violence and age of sexual initiation among non-heterosexual youth. Programs and interventions to curtail violence sequelae would need to consider the unique effects of various types of youth violence exposures and the significance of sexual orientation.

Earlier sexual debut predicts higher (not lower) levels of father care measured across 12 weeks: an experience sampling study

Across the lifespan, males negotiate the tradeoff between current and future reproduction. From a life history theory (LHT) perspective, resources invested into earlier reproduction pose a cost to later reproduction. The age of sexual debut is a commonplace measure of sexual maturation. However, in males, thorarche (age of first ejaculation) and years from thorarche to age of first reproduction both represent milestones related to reproductive timing. A fundamental prediction from LHT is that earlier sexual maturation-a "quantity" strategy-predicts decreased levels of care per offspring. In the current study, we test this straightforward relationship looking specifically at a father's investment of time. In a sample of first-time fathers, we measured the amount of time spent with their 9-to-12-month infants longitudinally using an experience sampling method (ESM)-an ecologically valid method of collecting self-report data on fathers' use of time Fathers contributed data on their time allocation across a 12-week period. They reported on ages of sexual debut, thorarche, and the years between thorarche and first reproduction (i.e., current age) was calculated. Only age of sexual debut had a relationship with time allocated toward infants. Importantly however, this effect was in a direction opposite of our LHT derived hypothesis. Males with earlier sexual debut spent more time with their infants. Discussion focuses on the potential contributions to this finding and limitations related to small effect size, methods and measurement, and sample demographics.

Internet-Delivered Sexually Transmitted Infection and Teen Pregnancy Prevention Program: A Randomized Trial

BACKGROUND

Black older-teenaged women have disproportionately high rates of sexually transmitted infections (STI) and unintended pregnancy (UTP). Internet-based interventions can be delivered to large groups of people in a relatively inexpensive manner. In this randomized trial, we examine the efficacy of an evidence-based STI/UTP prevention intervention adapted for older teens and for Internet delivery.

METHODS

Black women aged 18-19 years who were not pregnant/seeking to become pregnant were enrolled (n = 637) and randomized to an 8-session intervention or attention control and were followed up at 6/12 months postintervention. The primary outcome was defined as uptake of reliable contraceptives. Other secondary outcomes were examined, including intention to use condoms, intention to use reliable contraception, and STI or pregnancy rates.

RESULTS

Overall, at baseline, reliable contraception was 54.8% and dual protection was 29.4%, and the prevalence of STI was 11.1%. Participants were similar by arm for most factors considered. Participation and follow-up rates were excellent (60.9% and 80.3%). There was no statistically significant difference in uptake of reliable contraception for intervention versus controls at 6 months (1.45 [0.99-2.12]) or 12 months (1.33 [0.92-1.91]). At 6 months, several secondary outcomes were improved/trended toward improvement in intervention compared with control, but this effect waned by 12 months, except for intention to use condoms which remained improved.

CONCLUSION AND RELEVANCE

The intervention was efficacious for increasing some self-reported UTP and STI prevention behaviors, which waned over time, and the intervention had minimal impact on STI or pregnancy rates suggesting that this type of online intervention may need additional components.

"Urinary tract dilatation and vesicoureteral reflux - Adult outcomes, who should be followed, and how to follow them"

Long-term adult outcomes of children diagnosed with urinary tract dilatation (UTD) and vesicoureteral reflux (VUR) are not clearly documented in the literature. Likewise, follow-up protocols for these patients as they transition through adolescence and into adulthood vary with institution and cultures. Several studies have shown that individuals diagnosed with VUR in childhood are at higher risk of urinary tract infection (UTI) throughout their lives, even in the setting of prior VUR resolution or surgical correction. This is particularly relevant in patients with renal scarring, who are at higher risk of UTIs, hypertension and renal function deterioration in pregnancy. The risk of adverse maternal and fetal outcomes in pregnancy are higher for women with significant chronic kidney disease (CKD). Patients who underwent endoscopic injection or reimplantation should be counselled on the long-term particular risks associated with each intervention, including calcification of ureteric injection mounds, and the potential challenges of future endoscopic procedures following reimplantation. Although there is no evidence for the direct correlation between conservatively managed UTD in childhood, and symptomatic UTD diagnosed in adulthood, all patients should be aware of the long-term risks of persistent upper tract dilatation. Lastly, bladder-bowel dysfunction (BBD) management in adolescence can be more challenging and may contribute to symptomatic recurrence in this age group.

Sexual self-concept, functioning, and practices of women with binge eating episodes

PURPOSE

Positive sexuality has received little empirical attention in relation to eating disorders. Two tendencies related to sexuality have been identified among women with anorexia nervosa (avoidance) and bulimia nervosa (disinhibition), but it is unclear if they also apply to women with binge eating episodes without compensatory behaviors. This study aimed at (1) exploring the sexual self-concept, functioning, and practices of women with binge eating episodes with or without comorbid restrictive and/or compensatory behaviors, considering past experiences of violence, and (2) verifying the presence of distinct profiles of sexual dispositions among this population.

METHODS

In total, 253 women reporting recurrent episodes of loss of control related to food intake in the past 5 years, completed a web-based questionnaire. Descriptive and correlational analyses were conducted to outline participants' sexual self-concept, functioning, and practices and to examine the relationship between these factors. A two-step cluster analysis was also performed to determine whether participants presented distinct profiles of sexual dispositions.

RESULTS

Participants were generally characterized by a negative sexual self-concept and poor sexual functioning. While a first subgroup of participants displayed a pattern of sexual difficulties and avoidance, a second subgroup had a positive sexual self-concept, better sexual functioning and a wider range of sexual practices. Subgroups did not differ relative to binge eating.

CONCLUSIONS

Sexuality offers a platform for positive embodiment, which can lead to the improvement of body image and mind-body connection and may thus constitute an essential clinical target to improve treatment related to binge eating episodes.

LEVEL OF EVIDENCE

Level II: The experimental study is a non-randomized controlled trial.

Influence of Selected Sociodemographic and Cultural Factors on the Age of Sexual Initiation of Students from Polish Universities

Sexuality is the one of the most important parts of human life. The aim of our study was to identify the factors influencing the onset and age of sexual initiation in students and drawing attention to the need to improve access to sexual education in Polish schools at a sufficiently high level. An original questionnaire with 31 questions was used for the study. Data were collected using the Google Forms tool. A total of 7528 students participated in the study and 5824 underwent sexual initiation. The mean age at sexual initiation was 18.1 years. Logistic regression analysis was performed to show factors influencing the onset of sexual activity, while linear regression analysis was used for factors influencing the age of sexual initiation. Religion, drug use, smoking, alcohol consumption, type of housing, and conversations with parents about contraception or sex affect the onset of sexual activity. The age of sexual initiation is affected by religion, the age of the first viewing of pornography, quality of life, the size of the city of residence, smoking and drug use.

Associations between sexual and reproductive health knowledge, attitude and practice of partners and the occurrence of unintended pregnancy

Background

Although global contraceptive coverage has increased significantly, high rates of unintended pregnancy remain the current global status quo. A comparative analysis of the differences and correlations of knowledge, attitude and practice (KAP) of sexual and reproductive health (SRH) of both partners will help guide public health work according to gender characteristics and needs, and reduce the occurrence of unintended pregnancy.

Methods

A questionnaire survey of people with unintended pregnancies including women and their male partners (n = 1,275 pairs) who sought help from the Shanghai General Hospital Affiliated to Shanghai Jiao Tong University School of Medicine from October 2017 to October 2021. Data were collected on sexual and reproductive health knowledge, attitudes, and practices in both partners who had unintended pregnancies. Chi-square test and Logistic regression were used to analyze the relationship between the occurrence of unintended pregnancy and KAP and its influencing factors. Paired odds ratio and McNemar's test were used to estimate the difference and concordance of KAP between partners.

Results

This study included 1,275 partners with a mean age of 30.0 years. The partner's overall level of KAP is good. Compared with women, men had better knowledge (χ2 = 3.93, p = 0.047) and more active contraceptive practices (χ2 = 19.44, p < 0.001). In the analysis of partner concordance, male contraceptive intention was found to be better than female [matched pairs odds ratio (ORMP) = 2.56, p < 0.001], and the concordance of positive contraceptive practice between partners increased with male education [adjusted odds ratio (aOR) = 1.556, 95% confidence interval (CI) = 1.185-2.044, p = 0.001]. In partner-paired regression analysis, compared with good contraceptive knowledge in both men and women in the partner, the risk of negative contraceptive practice was 1.7 times (aOR = 1.721, 95% CI = 1.234-2.400, p = 0.001) higher with good contraceptive knowledge in women but negative in men, while women with poor contraceptive knowledge but men with good knowledge are 1.3 times (aOR = 1.349, 95% CI = 1.000-1.819, p = 0.05) more likely to have negative contraceptive practices. In addition, compared with partners with positive contraceptive attitudes, women with positive attitudes but negative men and women with negative attitudes but positive men had 1.7 and 1.4 times the risk of negative contraceptive practices, respectively.

Conclusion

The study found that unintended pregnancy occurs mainly in young people, and the younger age of first sexual intercourse, the low education background and the lack of discussion of contraception between partners are risk factors for not taking contraceptive measures. Men's better knowledge and contraceptive practices compared with female partners, and poor male contraceptive knowledge and attitudes may lead to a higher risk of negative contraceptive practices, the results suggest that male KAP plays an important role in promoting contraceptive use and reducing unintended pregnancy.

Factors associated with HPV vaccine acceptability and hesitancy among Black mothers with young daughters in the United States

Introduction

Compared to other-race peers, Black women are disproportionately impacted by human papillomavirus [HPV] infection, related health outcomes, and cervical cancer mortality as a result of suboptimal HPV vaccine uptake during adolescence. Few studies in the United States have examined psychosocial determinants of HPV vaccine acceptability and hesitancy among Black parents. The current study integrated the health belief model and the theory of planned behavior to evaluate the extent to which psychosocial factors are associated with pediatric HPV vaccination intentions among this population.

Methods

Black mothers (N = 402; age range = 25 to 69 years, M = 37.45, SD = 7.88) of daughters ages 9 to 15 years completed an online survey assessing HPV infection and vaccine beliefs and attitudes across four domains: Mother's HPV Perceptions, Mother's Vaccine Attitudes, Cues to Action, and Perceived Barriers to HPV Vaccination. Participants indicated their willingness to vaccinate their daughter on a 5-level ordinal scale ("I will definitely not have my daughter get the vaccine" to "I will definitely have my daughter get the vaccine") which was dichotomously recoded for binomial logistic regressions.

Results

Half of the sample (48%) intended to vaccinate their daughter. Number of daughters, mother's HPV vaccine status, perceived HPV vaccine benefits, HPV vaccine safety concerns, pediatric HPV vaccine peer norms, and doctor recommendations emerged as independent factors of Black mothers' intentions to vaccinate their daughters against HPV when controlling for all other factors.

Discussion

In addition to medical training to increase doctor recommendation of the HPV vaccine for Black girls, population-tailored public health messaging aimed at promoting HPV vaccine acceptance among Black mothers is urgently needed. This messaging should engage community support and emphasize the benefits of vaccination for adolescent Black girls while also addressing parental concerns regarding the safety of pediatric HPV vaccination.

Declines in Pregnancies among U.S. Adolescents from 2007 to 2017: Behavioral Contributors to the Trend

STUDY OBJECTIVES

Adolescent pregnancies and births in the United States have undergone dramatic declines in recent decades. We aimed to estimate the contribution of changes in 3 proximal behaviors to these declines among 14- to 18-year-olds for 2007-2017: 1) delays in age at first sexual intercourse, 2) declines in number of sexual partners, and 3) changes in contraceptive use, particularly uptake of long-acting reversible contraception (LARC).

DESIGN

We adapted an existing iterative dynamic population model and parameterized it using 6 waves of the Centers for Disease Control and Prevention's Youth Risk Behavior Survey. We compared pregnancies from observed behavioral trends with counterfactual scenarios that assumed constant behaviors over the decade. We calculated outcomes by cause, year, and age.

RESULTS

We found that changes in these behaviors could explain pregnancy reductions of 496,200, 78,500, and 40,700 over the decade, respectively, with total medical and societal cost savings of $9.71 billion, $1.54 billion, and $796 million. LARC adoption, particularly among 18-year-olds, could explain much of the improvement from contraception use. The 3 factors together did not fully explain observed birth declines; adding a 50% decline in sex acts per partner did.

CONCLUSIONS

Delays in first sexual intercourse contributed the most to declining births over this decade, although all behaviors considered had major effects. Differences from earlier models could result from differences in years and ages covered. Evidence-based teen pregnancy prevention programs, including comprehensive sex education, youth-friendly reproductive health services, and parental and community support, can continue to address these drivers and reduce teen pregnancy.

Primary Contraceptive Method use and Sexually Transmitted Infections in a Nationally Representative Sample of Young Women

STUDY OBJECTIVE

Rates of sexually transmitted infections (STIs) in the United States have increased for the sixth consecutive year. Young people ages 15-24 account for over half of all new infections despite comprising only a quarter of the sexually active population. A potential explanation for this is the increased use of long-acting reversible contraceptives, (LARCs) which could result in lower condom use and/or increased sexual risk-taking due to higher pregnancy prevention efficacy.

DESIGN

This paper uses the National Survey of Family Growth to examine the relationship between primary contraceptive method use among young women ages 15-24 and STI treatment in the past year, as well as the extent to which this association is mediated by relationship status and frequency of condom use.

RESULTS

Findings did not show differences in STI treatment in the past year by primary contraceptive method, indicating that LARC use among young women does not equate to increased STI risk. Findings did show that young women who had been in casual-only relationships or a mix of relationship types in the past year were more likely to have been treated for an STI than young women in serious or dating-only relationships, regardless of the primary method used. Additionally, young women who used condoms "some" of the time were more likely to have been treated for an STI compared with women who used condoms "all" or "most" of the time. This association was mediated by relationship status (P = .05).

CONCLUSION

Findings suggest that efforts to address the growing STI burden should be directed at providing comprehensive, gender-equitable sexual health education that enables young people to engage in healthy relationships and consistent condom use.

Knowledge of Sexuality and Contraception in Students at a Spanish University: A Descriptive Study

Youth is a period characterized by impulsiveness and risk-taking. This population often feels invulnerable and has a strong motivation to seek out their identity. These characteristics make it a risky age period for an unwanted pregnancy. This study aimed to investigate the level of knowledge about sexuality and contraception among nursing students at the University of Jaen. The students completed a 16-item questionnaire assessing their knowledge level about sexuality and contraception. A bivariate analysis was performed using the Kruskal–Wallis H and Mann–Whitney U tests. Later, an ordinal logistic regression model was generated. The sample consisted of 130 participants, with an average age of 20.36 years. The level of knowledge about sexuality and contraception was moderately high, 10.38 points out of 16. The factors associated with the probability of accordingly presenting a high level of knowledge were being a woman, having studied in a public institution, not having used any contraceptive method in the first sexual experience, and wishing to use a contraceptive pill in future sexual relations. In conclusion, the knowledge level about sexuality and contraception is high, although it is necessary to assess whether this level of high knowledge translates to the use of contraceptive methods in future sexual experiences.

A Qualitative Examination of Withdrawing Sexual Consent, Sexual Compliance, and Young Women's Role as Sexual Gatekeepers

Introduction: Withdrawing consent for sex may be difficult for young women due to gendered sexual scripts and male persistence. Method: 40 students from Canadian universities (31 women; Mean age = 20.20 years; 75% heterosexual) were asked open-ended questions about sexual experiences and consent; data were analyzed using thematic analysis. Results: Women perceived that: (1) women were responsible for communicating consent, (2) they were unaware it was acceptable to withdraw consent or did not know how to, (3) male partners often persisted in response to withdrawal of consent, and (4) these experiences factored into compliance. Conclusion: Sexual consent education, at least in North America, should increase emphasis on withdrawing consent.

Long-term effectiveness of human papillomavirus vaccines among adult women: A real-world scenario

OBJECTIVE

This study aimed to determine the real-world effectiveness of bi- or quadrivalent human papillomavirus (HPV) vaccines in Thai adult women ≥5 years post-vaccination in reducing HPV 16/18-associated low-grade squamous intraepithelial lesions or worse (LSIL+), atypical squamous cells of undetermined significance or worse (ASC-US+), and HPV 16/18 positivity.

METHODS

A retrospective cohort study was conducted among Thai women aged 20-45 years in Bangkok. The vaccinated and unvaccinated groups were matched according to baseline years. HPV/Pap test results were collected from the medical records and/or obtained by cervical sample collection at the study sites. Adjusted hazard ratios were measured using multivariable Cox regression analyses.

RESULTS

A total of 993 participants (493 vaccinated and 500 unvaccinated) were enrolled from 2018 to 2019. The median ages at baseline of the vaccinated and unvaccinated groups were 33 years (interquartile range [IQR] 27-38) and 34 years (IQR 30-38), respectively. The median follow-up periods were 7.3 years (IQR 6.1-8.6) and 7.2 years (IQR 5.8-8.9) for the vaccinated group and the unvaccinated group, respectively. More women in the vaccinated group were single (29.2% vs. 13.2%, P < 0.001) and university graduates (83.2% vs. 75.4%, P = 0.009). The vaccinated and unvaccinated groups had similar personal monthly incomes (>20,000 THB/month, 63.9% vs. 62.4%, respectively, P = 0.685). There were no cases of HPV 16/18-associated LSIL+ in the vaccinated group, whereas there were four cases in the unvaccinated group. HPV vaccine effectiveness was 88.0% (95% CI 2.0-98.5) in the reduction of HPV 16/18-associated ASC-US+, and 84.6% (95% CI 43.5-95.8) in the reduction of HPV 16/18 positivity.

CONCLUSIONS

HPV vaccine effectiveness was high in adult women in a real-world scenario in a developing country. Free HPV vaccination in adult women in this age group should be further explored when vaccine supplies are not limited. (HPV: human papillomavirus. LSIL+: low-grade squamous intraepithelial lesion or worse. ASC-US+: atypical squamous cells of undetermined significance or worse).

Perhaps It Was Too Soon: College Students' Reflections on the Timing of Their Sexual Debut

Early sexual debut has been a focus of social scientific research due to its association with adverse circumstances and negative outcomes. However, there has been a recent shift to considering not only chronological age, but also the degree to which the event is viewed to be optimally timed (i.e., the perception that it occurred at the "right time" versus too soon). The purpose of this study was to assess how individual/family background variables and contextual aspects of the experience (including partner and relationship aspects) are associated with both the actual age at sexual debut and the perceived acceptability of the timing of the event. Using data collected from students at a U.S. university between 1990 and 2019 (N = 6,430), several factors (in addition to chronological age) were associated with the perceived acceptability of the timing of sexual debut. Strong gender differences were found - women perceived their timing to be less acceptable, even though they did not differ from men in actual age at sexual debut. Other robust predictors of perceived acceptability included (lower) religious involvement and recalling desire (for the experience), pleasure, and lower guilt at the time. Only slight changes occurred over the 30-year period in age at sexual debut and perceived acceptability of the timing. Suggestions for future research are provided and implications for sex education/sexual health interventions are discussed.

Parent, partner and individual contexts of very early first sex experiences among young men and their links to subsequent reproductive health outcomes

Research indicates that upwards to 30% of US urban Black male adolescents report first sex younger than age 13; however, there is limited literature on the sexual and reproductive health outcomes and contexts of these early first sex experiences. This exploratory study described sexual and reproductive health histories and explored personal, partner and parent contextual factors associated with first sex experiences occurring at 13 years or younger among a sample of US urban young men aged 15-24. Participants were assessed on their demographics and sexual health histories and a subset of young men were assessed on the contextual factors related to their first sex experience. Pearson chi-squared tests examined factors associated with early first sex and Fisher's exact tests examined associated contextual factors. First sex at 13 years or younger was reported by 29% of young men. A higher proportion of young men who had first sex at 13 or younger than those who had sex onset at 14 or older reported having got someone pregnant, having a "much older" first partner, and relationship satisfaction with their mother (16%) and father (12%). Study findings highlight the need to better understand urban young men's early first sex experiences, including the support needed to promote their healthy sexual development.

Sexual Functioning in Adolescents With Major Depressive Disorder: A Prospective Study

Objective: To examine the association between sexual functioning, depression and anxiety severity, and selective serotonin reuptake inhibitor (SSRI) use in adolescents.

Methods: From September 2010 to December 2014, 15- to 20-year-old participants, either unmedicated or within a month of beginning SSRI treatment, completed the Beck Depression Inventory-II (BDI-II), Beck Anxiety Inventory (BAI), and Changes in Sexual Functioning Questionnaire (CSFQ) at baseline and every 4 months for up to 2 years. The DSM-IV-TR was used to determine presence of psychiatric disorders. Data regarding use of medications and hormonal contraception were collected. Polymorphisms of the HTR2A and ABCB1 genes were genotyped. Linear mixed-effects regression models examined the association between depression and anxiety symptom severity, SSRI use, and sexual functioning, accounting for relevant covariates.

Results: A total of 263 participants (59% female, mean ± SD age = 18.9 ± 1.6 years, 70% with major depressive disorder) contributed to this analysis. After adjusting for age, sex, and duration in the study, depression severity, but not anxiety severity, was associated with lower CSFQ total scores (β = -0.13, P < .0001) and lower arousal, orgasm, and pleasure subscale scores (all β = -0.03, P < .003). Higher SSRI doses were associated with lower orgasm subscale scores (β = -0.30, P < .03). Hormonal contraceptive use was associated with higher CSFQ total scores (β = 0.97, P < .003) and higher arousal (β = 0.25, P < .009), desire (β = 0.24, P < .001), orgasm (β = 0.27, P < .02), and pleasure (β = 0.15, P < .004) subscale scores. No significant genetic moderating effect was found.

Conclusions: In adolescents, depression is associated with lower sexual functioning while SSRI use impairs orgasm.

Examining Sexual Behavior Among U.S. Transgender Adolescents

The health of transgender adolescents (i.e., those identifying with a gender other than their sex assigned at birth) is gaining attention from researchers, yet little work has examined normative sexual behaviors among this population. Self-identified gender minority adolescents, including those identifying as trans boys, trans girls, nonbinary, and questioning their gender identity (age range 14-18, M_age = 16, n = 1,223) from all 50 U.S. states responded to anonymous online surveys. Participants reported on their age of initiation and number of sexual partners for four sexual behaviors ranging in intimacy (i.e., sexual touching, oral sex, vaginal sex, and anal sex). Participants also indicated the gender of their sexual partners and experiences with sexually transmitted infections (STIs), STI tests, and pregnancy. Overall, transgender adolescents' age of initiating sexual behaviors and number of sexual partners are similar to those observed in prior studies of cisgender adolescents. No differences were found between gender identity subgroups on ever engaging, age of initiation, number of partners, and gender of partners across the four sexual behaviors, with some exceptions for anal sex. Participants reported low rates of STIs and pregnancy, but also low rates of STI testing. Implications for sex education and health care are discussed.

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.

Adolescents who solely engage in online sexual experiences are at higher risk for compulsive sexual behavior

In addition to its expression offline, sexual behavior is frequently expressed online. Some adolescents solely engage in online sexual activities, whereas others in offline and online activities, or have no sexual experience at all. In the current research, we examined whether those who solely engage in online sexual activities are at greater risk for compulsive sexual behavior. In Study 1 (n = 164), we examined differences in compulsive sexual behavior (CSB) and risky sexual action tendencies between study groups. In Study 2 (n = 713), we statistically replicated the classification into different sexual behaviors and examined differences between the clusters in CSB, social tendencies and socio-demographic measures. Results indicated that adolescents who only engaged in online sexual activities had significantly higher percentage of clinical CSB, were less likely boys and more likely to be religious. There were not more prone to risky sexual behavior, however. The current research expands the knowledge about offline or online sexually related activities among adolescence.

Changes in the Sexual Double Standard Associated With Sociodevelopmental Factors Among Young Adolescents in Kinshasa

PURPOSE

This study aimed to describe the changes in adolescents' perceptions of a sexual double standard (SDS) over time and to examine the developmental and social factors associated with these changing perceptions.

METHODS

The sample includes 2,163 10- to 14-year-old adolescents from Kinshasa, interviewed at two time points (T0 and T1), 1 year apart. We examined associations between SDS and pubertal onset, family interactions, peer interactions, and media exposure. We conducted sex-stratified generalized estimation equation models to test associations between changes in SDS and sociodevelopmental factors at T0 as well as with changes in sociodevelopmental factors between T0 and T1.

RESULTS

At T0, the SDS score was 4.15/5 among boys and 4.43/5 among girls, signaling highly gender unequal perceptions. SDS scores increased over time, shifting toward greater inequality. Adolescents who were prepubertal at T0 experienced greater increases in SDS scores than those who were pubertal at T0. The greatest increase in SDS scores was observed among girls who transitioned through puberty between T0 and T1. High parental monitoring of boys mitigated the increase in SDS as did boys' increased exposure to social media between T0 and T1. Girls who had mixed-sex friendships also experienced less change in SDS perceptions compared with those who socialized in same-sex groups.

CONCLUSIONS

Puberty was associated with changes in SDS perceptions for all adolescents, whereas family interactions and media exposure affected changes in SDS perceptions for boys and peer interactions affected changes in SDS perceptions for girls.

Racial and Ethnic Disparities in Receipt of Sexual Health Care and Education Among A Nationally Representative Sample of Adolescent Females

OBJECTIVE(S)

The USA has a high rate of adolescent pregnancy, with non-Hispanic (NH) Black and Hispanic women disproportionately affected. We sought to investigate the presence of racial/ethnic disparities in the receipt of sexual health (SRH) care and education and whether such disparities contribute to differences in sexual health outcomes for youth.

STUDY DESIGN

We conducted a cross-sectional study of females aged 15-21 years who participated in the National Survey of Family Growth from 2008 to 2015. Multivariable logistic regression was used to measure the association between race/ethnicity and SRH outcomes after adjustment for potential confounders. Models were developed to measure whether receipt of SRH care and education served as an effect modifier on SRH outcomes.

RESULTS

The sample included 4316 participants, representing 33.5 million females. Almost half (47.2%) received birth control services in the last 12 months; NH-Blacks (aOR 0.7 [0.5, 0.9]) and Hispanics (aOR 0.6 [0.5, 0.8]) were less likely to have obtained birth control services than NH-whites. Hispanics (aOR 1.5 [1.2, 1.9]) had a higher likelihood of receipt of condom education than NH-whites. We found that disparities in SRH outcomes were slightly mitigated after adjustment for access to SRH care and education.

CONCLUSIONS

We identified racial/ethnic disparities in sexual health outcomes and in SRH and education; however, SRH care and education can mitigate some of these differences in sexual behaviors and outcomes. Racial/ethnic differences in sexual health outcomes may be at least partially related to the differential receipt of sexual health care and education and deserve further investigation.

Protocol for the Mason: Health Starts Here prospective cohort study of young adult college students

BACKGROUND

Young adulthood is a period of increasing independence for the 40% of young adults enrolled in U.S. colleges. Previous research indicates differences in how students' health behaviors develop and vary by gender, race, ethnicity, and socioeconomic status. George Mason University is a state institution that enrolls a highly diverse student population, making it an ideal setting to launch a longitudinal cohort study using multiple research methods to evaluate the effects of health behaviors on physical and psychological functioning, especially during the COVID-19 pandemic.

RESULTS

Mason: Health Starts Here was developed as a longitudinal cohort study of successive waves of first year students that aims to improve understanding of the natural history and determinants of young adults' physical health, mental health, and their role in college completion. The study recruits first year students who are 18 to 24 years old and able to read and understand English. All incoming first year students are recruited through various methods to participate in a longitudinal cohort for 4 years. Data collection occurs in fall and spring semesters, with online surveys conducted in both semesters and in-person clinic visits conducted in the fall. Students receive physical examinations during clinic visits and provide biospecimens (blood and saliva).

CONCLUSIONS

The study will produce new knowledge to help understand the development of health-related behaviors during young adulthood. A long-term goal of the cohort study is to support the design of effective, low-cost interventions to encourage young adults' consistent performance of healthful behaviors, improve their mental health, and improve academic performance.

The Relationship Between Violence Syndemics and Sexual Risk Behaviors Among African American Adolescents: Implications for Future Research

PURPOSE

We present a conceptual framework based on a review of the literature to highlight the interconnecting and reinforcing elements of a violence syndemic and how this syndemic influences sexual risk behaviors among African American heterosexual adolescents.

METHODS

We review existing peer-reviewed published research from 2000 to 2020 that links a violence syndemic (i.e., racism and race-related stress, neighborhood and police violence, peer violence, and family violence and disruptions) to adolescent sexual risk behaviors. Empirical findings and theoretical underpinnings are used to document this relationship and illuminate the factors that mediate this relationship.

RESULTS

Empirical studies support the links between specific types of violence and sexual risk behaviors among African American adolescents. Further, existing studies point to the important relationships among the specific types of violence, supporting a violence syndemic approach.

CONCLUSIONS

While more researchers are examining socio-ecological contextual factors as important predictors for sexual risk behaviors, there remains inadequate understanding about how violence types reinforce one another to heighten sexual risk behaviors among African American heterosexual adolescents. This article presents new directions for adolescent research, especially how a violence syndemic approach can be used to explain sexual risk, but also to refocus intervention design on the complex burdens experienced by this population.

Single-port laparoscopic hysterectomy for uteri greater than 500 grams

OBJECTIVES

To study the operative outcomes of single-port laparoscopic hysterectomy in uteri greater than 500 g, using either laparoscopic assisted vaginal hysterectomy (LAVH) or laparoscopic supracervical hysterectomy (LSH).

MATERIALS AND METHODS

78 patients were included in a single institute by a single surgeon from March, 2013 to January, 2018.

RESULTS

The median uterine weight was 686.5 g. Larger uterine weight was correlated with longer operative time and greater estimated blood loss. Two types of operations were performed: LAVH (n = 55) or LSH (n = 23). There were no differences in operative time (150.2 ± 45.1 vs. 158.6 ± 82.1, P = 0.66) and estimated blood loss (365.8 ± 298.5 vs. 356.5 ± 46.6, ml, P = 0.94) between LAVH and LSH. However, patients in LAVH had more excess blood loss (>500 mL) compared with LSH (32.7% vs. 21.7%, P = 0.42). In the later study period, the operative time was shorter and complication rates were lower. Such differences were especially significant in the LAVH group. By multiple regression analysis, operative time was independently correlated with age, body mass index, estimated blood loss and uterine weight in LAVH. The correlation between operative time and uterine weight in LSH was attenuated by estimated blood loss. Estimated blood loss was the dominant factor correlated with longer operative time in LSH.

CONCLUSIONS

Both LAVH and LSH could be feasible in uteri greater than 500 g. LSH appeared to have less complication and less blood loss than LAVH. Operative time was correlated significantly with bleeding amount. Therefore, better bleeding control and surgical experience were warrants for single-port laparoscopic hysterectomy in uteri greater than 500 g.

Trends in U.S. adolescent sexual behavior and contraceptive use, 2006-2019

OBJECTIVE

This study examines changes over time in the prevalence of select sexual behaviors and contraceptive use measures in a national sample of U.S. adolescents.

STUDY DESIGN

We used data on adolescents aged 15-19 from the 2006-2010 (n=4,662), 2011-2015 (n=4,134), and 2015-2019 (n=3,182) National Surveys of Family Growth. We used logistic regression to identify changes between periods in sexual behaviors and contraceptive use by gender, and for some measures by age. We estimated probabilities of age at first penile-vaginal intercourse with Kaplan-Meier failure analysis.

RESULTS

Over half of adolescents have engaged in at least one of the sexual behaviors measured. Males reported declines in sexual behaviors with a partner of a different sex. Adolescent males reported delays in the timing of first penile-vaginal intercourse. Adolescent females reported increases from 2006-2010 to 2015-2019 in use at last intercourse of any contraceptive method (86%, 95%CI 83-89; 91%, 95%CI 88-94), multiple methods (26%, 95%CI 22-31; 36%, 95%CI 30-43), and IUDs or implants (3%, 95%CI 1-4; 15%, 95%CI 11-20). Adolescent males reported increases in partners' use of IUDs or implants use from <1% to 5% and recent declines in condom use at last intercourse (78%, 95%CI 75-82, 2011-2015; 72%, 95%CI 67-77, 2015-2019). Condom consistency declined over time. Males were more likely than females to report condom use at last intercourse and consistent condom use in the last 12 months.

CONCLUSIONS

These findings identify declines in male adolescent sexual experience, increased contraceptive use overall, and declines in consistent condom use from 2006 to 2019.

IMPLICATIONS

This analysis contributes a timely update on adolescent sexual behavior trends and contraceptive use, showing that adolescent behaviors are complex and evolving. Sexual health information and services must be available so that young people have the resources to make healthy and responsible choices for themselves and their partners.

Partnered Sexual Behaviors, Pleasure, and Orgasms at Last Sexual Encounter: Findings from a U.S. Probability Sample of Black Women Ages 18 to 92 Years

The purpose of this study was to estimate the prevalence of sexual behaviors and experiences of Black women's partnered behaviors at their most recent sexual event. Data were from a subset of 980 Black women ages 18 to 92 who participated in the 2018 National Survey of Sexual Health and Behavior. Findings provide a sex-positive view of Black women and their partnered experiences, indicating a range of activities; most wanted their sexual experiences, experienced orgasms, and reported pleasurable experiences. These results provide a foundation for sexual health practitioners, educators, and therapists to improve societal knowledge about Black women's sexuality.

A Multi-Modal MRI Analysis of Cortical Structure in Relation to Gender Dysphoria, Sexual Orientation, and Age in Adolescents

Gender dysphoria (GD) is characterized by distress due to an incongruence between experienced gender and sex assigned at birth. Sex-differentiated brain regions are hypothesized to reflect the experienced gender in GD and may play a role in sexual orientation development. Magnetic resonance brain images were acquired from 16 GD adolescents assigned female at birth (AFAB) not receiving hormone therapy, 17 cisgender girls, and 14 cisgender boys (ages 12–17 years) to examine three morphological and microstructural gray matter features in 76 brain regions: surface area (SA), cortical thickness (CT), and T1 relaxation time. Sexual orientation was represented by degree of androphilia-gynephilia and sexual attraction strength. Multivariate analyses found that cisgender boys had larger SA than cisgender girls and GD AFAB. Shorter T1, reflecting denser, macromolecule-rich tissue, correlated with older age and stronger gynephilia in cisgender boys and GD AFAB, and with stronger attractions in cisgender boys. Thus, cortical morphometry (mainly SA) was related to sex assigned at birth, but not experienced gender. Effects of experienced gender were found as similarities in correlation patterns in GD AFAB and cisgender boys in age and sexual orientation (mainly T1), indicating the need to consider developmental trajectories and sexual orientation in brain studies of GD.

Not Race or Age but Their Interaction Predicts Pre-Adolescents' Inhibitory Control

Background

African American pre-adolescents are at a higher risk of risky behaviors such as aggression, drug use, alcohol use, and subsequent poor outcomes compared to Caucasian pre-adolescents. All these high-risk behaviors are connected to low levels of inhibitory control (IC).

Aim

We used the Adolescent Brain Cognitive Development (ABCD) data to compare Caucasian and African American pre-adolescents for the effect of age on pre-adolescents IC, a driver of high-risk behaviors.

Methods

This cross-sectional analysis included 4,626 pre-adolescents between ages 9 and 10 from the ABCD study. Regression was used to analyze the data. The predictor variable was age measured in months. The main outcome was IC measured by a stop-signal task (SST). Race was the effect modifier.

Results

Overall, age was associated with IC. Race also showed a statistically significant interaction with age on pre-adolescents' IC, indicating weaker effects of age on IC for African American than Caucasian pre-adolescents.

Conclusion

Age-related changes in IC are more pronounced for Caucasian than African American pre-adolescents. To eliminate the racial gap in brain development between African American and Caucasian pre-adolescents, we should address structural and societal barriers that alter age-related development for racial minority pre-adolescents. Social and public policies, rather than health policies, are needed to address structural and societal barriers that hinder African American adolescents' brain development. Interventions should add resources to the urban areas that many African American families live in so their children can have better age-related brain development. Such changes would be essential given IC in pre-adolescents is a predictor of a wide range of behaviors.

How Do Parents Teach "No Means No"? An Exploration of How Sexual Consent Beliefs Are Socialized During Adolescence

Research on sexual consent has increased in recent years, but we know almost nothing about how beliefs about consent are socialized during adolescence, which likely has important implications for behaviors related to obtaining sexual consent. The current study explored the frequency of parent-adolescent consent communication, as well as demographic, adolescent, and parent predictors of adolescents' beliefs about the importance of consent and the frequency of parent-adolescent consent communication. Two national samples were used, one consisting of 2,044 adolescents, ages 13 to 18 (M _age = 16.19, SD = 1.71; 50% female), and a second sample of 2,081 nonrelated individuals, ages 28 to 81, who were parents of teens ages 13-18 (M _age = 15.25, SD = 1.56). Findings suggested that parents did not talk about sexual consent any more than they did about other sexual topics (e.g., reproduction). We also found that maternal warmth was positively associated with adolescents' importance of consent beliefs and that adolescents' uninhibited temperament and parents' self-efficacy and sexual beliefs were associated with parent-adolescent consent communication. The discussion focuses on the need to educate parents so they feel more confident talking to adolescents about the importance of giving and receiving sexual consent.

Primary Care Use and Assessment of Adolescents' Sexual Health During Hospitalization

OBJECTIVES

Hospitalization provides an opportunity to address sexual health needs of adolescents who may not otherwise receive regular medical care. We investigated documentation of a sexual health discussion with adolescents hospitalized at our medical center to determine if previous primary care physician (PCP) visits in the same health system were associated with sexual health documentation during the hospital admission.

METHODS

We retrospectively identified adolescents aged 13 to 17 years discharged from the pediatric general ward. Documented discussion of sexual health was reviewed in the electronic medical record. Previous PCP visits were identified from the affiliated primary care clinics within 12 months before hospitalization. We also queried follow-up PCP visits within 90 days of discharge to determine if a sexual health discussion during hospitalization was followed-up in the outpatient setting.

RESULTS

We analyzed 394 patients (49% girls; median age 15 years), of whom 122 (31%) had documentation of a sexual health discussion while hospitalized and 75 (19%) had previous PCP visits in our health system. On multivariable analysis, older age (P < .001), female sex (P = .016), admission from the emergency department (P < .001), and a genitourinary primary problem at admission (P = .007), but not previous PCP visits, were associated with increased likelihood of sexual health documentation.

CONCLUSIONS

Although discussion of sexual health was uncommon overall for hospitalized adolescents, we noted that nearly 4 in 5 adolescents for whom this was documented had not recently visited a PCP in our health system. These findings highlight hospitalization as a unique opportunity for sexual health intervention among adolescents who may not regularly see a PCP.

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.

How Do Acculturation, Maternal Connectedness, and Mother-Daughter Sexual Communication Affect Asian American Daughters' Sexual Initiation?

Purpose: There was a growth of approximately ten million Asian American individuals in the United States between 2000 and 2015. Asian Americans have conservative values surrounding sexual health and sexual communication is a cultural taboo. Researchers have shown discrepancies on whether the level of acculturation influences Asian mother-daughter sexual communication. In other minority populations there is evidence that a connected mother-daughter relationship increases sexual communication and delays sexual initiation. The purpose of this study was to examine whether mother-daughter connectedness and level of acculturation predict sexual communication in turn affecting the age of female Asian emerging adult's sexual initiation. Methods: This was a longitudinal, secondary analysis of AddHealth examining whether mother-daughter connectedness and level of acculturation predict sexual communication. There were 243 Asian American mother-daughter dyads in Wave I with linked data in Wave III who were included in the study. Acculturation, connectedness, and sexual communication were all measured using interval level data. Results: Connectedness did not significantly contribute to the relationship between any of the concepts. Although it was predicted that sexual communication would delay initiation, the opposite was found. Also, communication mediated the relationship between acculturation and initiation. Conclusions: Further studies are needed to explore how connectedness is defined by Asian American mother-daughter dyads. In addition, more detailed operational definitions of acculturation and communication are needed, specifically the timing of sexual communication.

Human papillomavirus vaccine timing associated with eventual human papillomavirus diagnosis in women

Nearly all cases of cervical cancer are attributable to human papillomavirus (HPV), making it a significant women's health issue. Though there have been advances in the prevention of HPV via vaccination, significant barriers continue to suppress vaccination rates for girls. Delaying vaccination until after sexual debut increases a woman's chance of HPV infection, but there has been no quantification of this risk in the literature. The present study sought to address this gap via secondary data analysis with 173 female participants from the 2015-2016 National Health and Nutrition Examination Survey dataset. Results indicate that women in the sample who received the HPV vaccine after their sexual debut were 2.63 times more likely than women who receive the vaccine before their sexual debut to report an HPV diagnosis. These results have clear public and sexual health implications.

African American Children's Diminished Returns of Subjective Family Socioeconomic Status on Fun Seeking

Background: Reward sensitivity (fun-seeking) is a risk factor for a wide range of high-risk behaviors. While high socioeconomic status (SES) is known to reduce reward sensitivity and associated high-risk behaviors, less is known about the differential effects of SES on reward sensitivity. It is plausible to expect weaker protective effects of family SES on reward sensitivity in racial minorities, a pattern called Minorities' Diminished Returns (MDRs). Aim: We compared Caucasian and African American (AA) children for the effects of subjective family SES on children's fun-seeking. Methods: This was a cross-sectional analysis of 7061 children from the Adolescent Brain Cognitive Development (ABCD) study. The independent variable was subjective family SES. The main outcome was children's fun-seeking measured by the behavioral approach system (BAS) and behavioral avoidance system (BIS). Age, gender, marital status, and household size were the covariates. Results: In the overall sample, high subjective family SES was associated with lower levels of fun-seeking. We also found a statistically significant interaction between race and subjective family SES on children's fun-seeking in the overall sample, suggesting that high subjective family SES is associated with a weaker effect on reducing fun-seeking among AA than Caucasian children. In race-stratified models, high subjective family SES was protective against fun-seeking of Caucasian but not AA children. Conclusion: Subjective family SES reduces the fun-seeking for Caucasian but not AA children.

Longitudinal Trajectories of Physical Intimate Partner Violence Among Adolescent Girls in Rural South Africa: Findings From HPTN 068

PURPOSE

Little is known about temporal patterns of physical intimate partner violence (PIPV) among South African adolescent girls. We sought to identify and describe PIPV risk trajectories and related correlates in this population.

METHODS

Our analytical cohort came from the HPTN 068 Cash Transfer Trial in Mpumalanga Province, South Africa. Cohort members were eighth and ninth graders (median age 14 years) who enrolled in 2011 and had three to four annual, self-reported PIPV measurements. We used group-based trajectory models to identify groups of girls with similar longitudinal patterns of PIPV risk over 4 years and potential correlates of group membership.

RESULTS

We identified two trajectory groups (n = 907): a higher-risk group (~52.8% of the cohort) with predicted PIPV probabilities of 13.5%-41.1% over time and a lower-risk group (~47.2% of the cohort) with predicted probabilities of 2.3%-10.3%. Baseline correlates of higher-risk group membership were ever having had sex (adjusted odds ratio [aOR]: 4.42, 95% confidence interval [CI]: 1.56-12.57), borrowing money (aOR: 1.95, 95% CI: 1.01-3.79), and older age (aOR per 1-year increase: 1.39, 95% CI: 1.11-1.73), while being in the 068 intervention arm (aOR: .29, 95% CI: .17-.51) and supporting more gender-equitable norms (aOR per 1-unit score increase: .89, 95% CI: .81-.97) were inversely associated.

CONCLUSIONS

A high proportion of adolescent girls experience sustained PIPV risk in rural South Africa, suggesting a need for interventions in late primary school that encourage gender-equitable norms, healthy relationships, and safe ways to earn income during adolescence.

Reward Responsiveness in the Adolescent Brain Cognitive Development (ABCD) Study: African Americans' Diminished Returns of Parental Education

(1) Background: Reward responsiveness (RR) is a risk factor for high-risk behaviors such as aggressive behaviors and early sexual initiation, which are all reported to be higher in African American and low socioeconomic status adolescents. At the same time, parental education is one of the main drivers of reward responsiveness among adolescents. It is still unknown if some of this racial and economic gap is attributed to weaker effects of parental education for African Americans, a pattern also called minorities' diminished returns (MDRs). (2) Aim: We compared non-Hispanic White and African American adolescents for the effects of parent education on adolescents RR, a psychological and cognitive construct that is closely associated with high-risk behaviors such as the use of drugs, alcohol, and tobacco. (3) Methods: This was a cross-sectional analysis that included 7072 adolescents from the adolescent brain cognitive development (ABCD) study. The independent variable was parent education. The main outcome as adolescents' RR measured by the behavioral inhibition system (BIS) and behavioral activation system (BAS) measure. (4) Results: In the overall sample, high parent education was associated with lower levels of RR. In the overall sample, we found a statistically significant interaction between race and parent education on adolescents' RR. The observed statistical interaction term suggested that high parent education is associated with a weaker effect on RR for African American than non-Hispanic White adolescents. In race-stratified models, high parent education was only associated with lower RR for non-Hispanic White but not African American adolescents. (5) Conclusion: Parent education reduces RR for non-Hispanic White but not African American adolescents. To minimize the racial gap in brain development and risk-taking behaviors, we need to address societal barriers that diminish the returns of parent education and resources in African American families. We need public and social policies that target structural and societal barriers, such as the unequal distribution of opportunities and resources. To meet such an aim, we need to reduce the negative effects of social stratification, segregation, racism, and discrimination in the daily lives of African American parents and families. Through an approach like this, African American families and parents can effectively mobilize their resources and utilize their human capital to secure the best possible tangible outcomes for their adolescents.

Parental Education on Youth Inhibitory Control in the Adolescent Brain Cognitive Development (ABCD) Study: Blacks' Diminished Returns

BACKGROUND

Non-Hispanic Black (NHB) youth are at a higher risk of high-risk behaviors compared to non-Hispanic White (NHW) youth. Some of this racial gap is shown to be due to weaker effects of parental educational attainment on reducing the prevalence of behavioral risk factors such as impulsivity, substance use, aggression, obesity, and poor school performance for NHBs, a pattern called Minorities' Diminished Returns. These diminishing returns may be due to lower than expected effects of parental education on inhibitory control.

AIM

We compared NHW and NHB youth for the effect of parental educational attainment on youth inhibitory control, a psychological and cognitive construct that closely predicts high-risk behaviors such as the use of drugs, alcohol, and tobacco.

METHODS

This was a cross-sectional analysis that included 4188 youth from the Adolescent Brain Cognitive Development (ABCD) study. The independent variable was parental educational attainment. The main outcome was youth inhibitory control measured by the stop-signal task (SST), which was validated by parent reports on the Child Behavior Checklist (CBCL).

RESULTS

In race/ethnicity-stratified models, high parental educational attainment was associated with a higher level of inhibitory control for NHB than NHW youth. In the pooled sample, race/ethnicity showed a statistically significant interaction with parental educational attainment on youth inhibitory control suggesting that high parental educational attainment has a smaller boosting effect on inhibitory control for NHB than NHW youth.

CONCLUSION

Parental educational attainment boosts inhibitory control for NHW but not NHB youth. To minimize the racial gap in youth brain development, we need to address societal barriers that diminish the returns of family economic and human resources, particularly parental educational attainment, for racial and ethnic minority youth. Social and public policies should address structural and societal barriers such as social stratification, segregation, racism, and discrimination that hinder NHB parents' abilities to effectively mobilize their human resources and secure tangible outcomes for their developing youth.

Prevalence of sexual experience among Korean adolescent: age-period-cohort analysis

OBJECTIVES

Since exposure to sexual content and early sexual initiation among adolescents have become serious social issues in Korea, an in-depth analysis of trends in the prevalence of sexual experience among Korean adolescents is necessary to project the trends and policies required for the next 10 years. The objective of this study was to identify the contributions of age, period, and birth cohort effects on the prevalence of sexual experience in Korean adolescents.

METHODS

We analyzed age-specific, period-specific, and birth cohort–specific trends in the prevalence of sexual experience among 911,502 adolescents (469,593 boys, 51.5%; 441,909 girls, 48.5%) aged 12 years to 17 years from the 2006 to 2017 Korean Youth Risk Behavior Web-based Survey. Joinpoint regression analysis was conducted to examine significant changes in the prevalence of sexual experience and to find the optimal number and location of places where trends changed.

RESULTS

The prevalence of sexual experience generally increased with age in all periods in both boys and girls. In boys, the prevalence of sexual experience increased in recent periods, especially in the age group of 12-13 years, while the prevalence of sexual experience decreased in the age group of 16-17 years. In girls, the age group of 12-13 years showed an increased prevalence of sexual experience in recent periods. However, the prevalence showed a decreasing trend in the age group of 16-17 years.

CONCLUSIONS

In boys and girls, sexual experience increased with age, although this tendency has slowed in recent cohorts. Therefore, early sex education is needed.

Sex, drugs, and early emerging risk: Examining the association between sexual debut and substance use across adolescence

Sexual debut, or first intercourse, predicts problem behaviors such as substance use. This association could reflect a direct effect of debut itself, general developmental trends, or the fact that some youth are more predisposed to a wide array of problem behaviors (e.g., risky sex, substance use). Understanding the association between sexual debut and substance use thus requires methods that can distinguish between these various accounts. In this study the association between sexual debut and substance use was investigated in a longitudinal sample of Mexican-origin youth (N = 674) assessed annually from 5^th (M_age = 10.86 years, SD = 0.51) through 12^th grade (M_age = 17.69 years, SD = 0.48). The longitudinal aspect of the data allowed the direct effect of sexual debut on substance use to be tested while accounting for long-term trends in substance use, and stable individual differences in those trends based on early risk and debut timing. Substance use increased over time, and early risk and debut were consistently associated with more substance use. Sexual debut also modestly predicted an increase in substance use after accounting for these effects, however. Taken together, results provide some evidence consistent with each of the potential explanations for the association between sexual debut and substance use across adolescence.

Birth Cohort and Racial/Ethnic Differences in the Age of First Oral and Anal Sex Among U.S. Men Who Have Sex with Men

Earlier age of first sex has potential direct and indirect health effects later in life. Though there are multiple nationwide general population studies on ages of first sex, there is no such nationwide study of first male-male oral or anal sex among men who have sex with men (MSM). This may be important for understanding racial/ethnic disparities in HIV and sexually transmitted infection acquisition among young racial/ethnic minority MSM. Our study examined the birth cohort and racial/ethnic differences in ages of first male-male oral and anal sex using a diverse 2015 U.S. nationwide sample of 10,217 sexually active MSM. The mean age of first male-male oral sex was 18.0 years. Compared with older birth cohorts, those MSM born 1990-2000 were more likely to have younger age of first male-male oral sex. Compared to white MSM, Hispanic MSM and non-Hispanic black MSM were more likely to have younger age of first male-male oral sex with a man. The mean age of first male-male anal sex was 20.3 years. Compared with older birth cohorts, those MSM born 1990-2000 were more likely to have younger age of first male-male anal sex. Compared to white MSM, MSM of all other racial/ethnic groups were more likely to have younger age of first male-male anal sex. These findings emphasize the need for comprehensive and MSM-inclusive sexual health education for young teens and online sexual health resources for young gay, bisexual, queer, and other MSM.

Mental health, social support, and HIV-related sexual risk behaviors among HIV-negative adolescent sexual minority males: three U.S. cities, 2015

We examined the association between mental health issues, social support, and HIV among adolescent sexual minority males (SMM), who are disproportionally affected by HIV. National HIV Behavioral Surveillance among Young Men Who Have Sex with Men (NHBS-YMSM) data among SMM aged 13-18 years were collected in three cities (Chicago, New York City, and Philadelphia). Separate log-linked Poisson regression models were used to estimate associations between mental health issues and social support (general and family), and 3 HIV-related sexual risk behavior outcomes: past-year condomless anal intercourse (CAI) with a male partner, past-year sex with ≥ 4 partners, and first vaginal or anal sex before age 13. Of 547 adolescent SMM, 22% reported ever attempting suicide and 10% reported past-month suicidal ideation. The majority (52%) reported depression and anxiety. Thirty-nine percent reported CAI, 29% reported ≥ 4 sex partners and 22% reported first sex before age 13. Ever attempting suicide, suicidal ideation, and depression and anxiety were associated with CAI. Separately, ever attempting suicide and lack of family support were associated with  ≥ 4 sex partners. None of the mental health or support measures were associated with having sex before age 13. General social support was not associated with any sexual risk behaviors. Mental health issues are common among adolescent SMM and associated with sexual risk behaviors. Including mental health support in comprehensive HIV prevention for adolescent SMM could potentially reduce HIV risk in this population.

Early sexual debut and risky sex in young adults: the role of low self-control

BACKGROUND

The purpose of this study was to examine the role of low self-control as a mediator or moderator between early age at sexual debut and risky sexual behavior in young adulthood.

METHODS

Data on 5734 male and female Add Health participants were used. Self-control (waves 1 & 3), age at sexual debut (wave 3) and risky sexual behavior (wave 4) were used in a structural equation modeling framework to assess the relationships of interest.

RESULTS

Approximately 17% of respondents were < 15 years at first sexual intercourse. Among females only, both early age at first intercourse (Parent-report: z = 5.08, p < .001; Self-report: z = 2.05, p < .05) and low self-control at wave 3 (Parent-report: z = 2.30, p < .05; Self-report: z = 2.31, p < .05) mediated the relationship between low self-control at wave 1 and risky sexual behaviors in young adulthood. Similarly in the male-only model, both early age at first intercourse (Parent-report: z = 2.92, p < .01; Self-report: z = 3.04, p < .01) and low self-control at wave 3 (Parent-report: z = 1.99, p < .05; Self-report: z = 3.15, p < .01) mediated the relationship between low self-control and risky sexual behaviors in young adulthood. There was evidence of moderation in the male-only model (- 0.26, p < .01), such that lower impulsivity strengthened the relationship between early sex and risky sex.

CONCLUSIONS

This study confirms the role of executive functions in sexual behaviors and suggests that interventions aimed at improving self-control may be beneficial in reducing risky sexual behavior.

Onset Trajectories of Sexting and Other Sexual Behaviors Across High School: A Longitudinal Growth Mixture Modeling Approach

Sexting is receiving substantial scholarly attention and is now considered commonplace in adolescence. Little is known, however, about the normative contexts and the development of adolescent sexting behavior, including the initiation of sexting in relation to other sexual behaviors. In this study, we used growth mixture modeling to identify classes of onset trajectories for sexual behaviors across high school. Participants included 429 high school students (54% female) who completed annual assessments of sexual behavior over a three-year period. We identified four distinct classes: postponement (9%) with no behaviors other than hand-holding and kissing initiated by Grade 11, gradual onset (44%) with sexting and other sexual behaviors emerging incrementally across high school, continuous onset (32%) with sexting and other sexual behaviors within the first three years of high school, early onset (15%) with initiation of sexting and all other sexual behaviors prior to or by the end of Grade 9. Boys were more likely than girls to be members of the postponement versus gradual onset class, while Black students were more likely than White students to be members of the early versus gradual onset class. Sexting behavior appears to be common in adolescence and co-emerges with genital contact behavior across varying trajectories of sexual development. These findings provide the foundation for contextualizing sexting within normative sexual development. Further, this information can inform efforts to promote sexual health.