Characteristics of sexual partners and STD infection among American adolescents

Association between early sexual initiation and sexually transmitted infections among Peruvian reproductive-age women

Background

Sexually transmitted infections (STIs) are a serious public health problem worldwide, especially among reproductive-age women. The early sexual onset of sexual intercourse (EOSI) has been suggested as a risk factor, although there is no data at the national level.

Objective

To evaluate the association between EOSI and STIs in Peruvian women of childbearing age.

Methods

Analytical cross-sectional study with secondary data analyzes of the Peruvian Demographic and Family Health Survey 2018. The outcome was the presence of STIs in the last 12 months and the exposure variable was EOSI (age < 15 years at the time of their first sexual experience). To evaluate the association of interest, crude and adjusted prevalence ratios (aPRs) were calculated using generalized linear models with Poisson family and logarithmic link function.

Results

We analyzed data from 31,028 women of childbearing age. The 11.3% reported having STIs in the last 12 months and 20.2% of the participants had an EOSI. After adjusting for potential confounders, we found that EOSI was associated with STIs (aPR: 1.27; 95% CI: 1.08-1.50; p = 0.005). When conducting stratified analysis by area of residence and number of sexual partners, this association was maintained in women living in urban areas (aPR: 1.36; 95% CI: 1.11-1.66; p = 0.003) those who did not report having a history of multiple sexual partners (aPR: 1.27; 95% CI: 1.08-1.51; p = 0.005), and those in the middle (aPR: 1.42; 95% CI: 1.03-1.97; p = 0.034) and highest (aPR: 2.12; 95% CI: 1.33-3.39; p = 0.002) wealth quintiles.

Conclusion

Among reproductive-age women from Peru, EOSI was associated with STIs, especially in women living in urban areas, with no history of multiple sexual partners, and belonging to the middle to higher wealth index. The implementation of measures to prevent EOSI and fostering appropriate sexual health counseling for women with EOSI is advised.

Chlamydia trachomatis, Neisseria gonorrhoea, and Trichomonas vaginalis infections among pregnant women and male partners in Dutch midwifery practices: prevalence, risk factors, and perinatal outcomes

Background

Antenatal screening for HIV, syphilis and HBV has been successfully implemented in The Netherlands, but data on other STI among pregnant women or male partners are limited. Our objectives: (i) to assess the prevalence of Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) among pregnant women and male partners, (ii) to identify risk factors for these STI during pregnancy, and (iii) to identify adverse perinatal outcomes (APO) associated with STI.

Methods

Cross-sectional study. Pregnant women aged ≤ 30 years (n = 548) and male partners (n = 425) were included at 30 midwifery practices during 2012–2016. Participants provided a self-collected vaginal swab (women) or urine sample (men) and completed a questionnaire. Perinatal data were derived from pregnancy cards. APO was defined as premature rupture of membranes, preterm delivery, low birthweight, stillbirth, neonatal conjunctival and respiratory infections. Data were analysed by logistic regression.

Results

STI were present in 2.4% of pregnant women (CT 1.8%, NG 0.4%, TV 0.4%), and in 2.2% of male partners (CT 2.2%, NG 0.2%, TV 0%). Of young women (≤ 20 years), 12.5% had a CT infection. Prevalent STI during pregnancy was associated with female young age (≤ 20 years vs ≥ 21 years) (adjusted OR 6.52, CI 95%: 1.11–38.33), male non-Western vs Western background (aOR 9.34, CI 2.34–37.21), and female with ≥ 2 sex partners < 12 months vs 0–1 (aOR 9.88, CI 2.08–46.91). APO was not associated with STI, but was associated with female low education (aOR 3.36, CI 1.12–10.09), complications with previous newborn (aOR 10.49, CI 3.21–34.25 vs no complications) and short duration (0–4 years) of relationship (aOR 2.75, CI 1.41–5.39 vs ≥ 5 years). Small-for-gestational-age was not associated with STI, but was associated with female low education (aOR 7.81, 2.01–30.27), female non-Western background (aOR 4.41, 1.74–11.17), and both parents smoking during pregnancy (aOR 2.94, 1.01–8.84 vs both non-smoking).

Conclusions

Prevalence of STI was low among pregnant women and male partners in midwifery practices, except for CT among young women. The study could not confirm previously observed associations between STI and APO, which is probably due to low prevalence of STI, small study sample, and presumed treatment for STI.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12978-021-01179-8.

Antenatal screening for HIV, syphilis and HBV has been successfully implemented in The Netherlands, but data on other STI among pregnant women or male partners are limited. Our objectives were: (i) to assess the prevalence of Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) among pregnant women and male partners, (ii) to identify risk factors for these STI during pregnancy, and (iii) to identify adverse perinatal outcomes (APO) associated with STI.

Pregnant women aged ≤ 30 years and male partners were included at 30 midwifery practices. Women provided a vaginal swab, partners a urine sample; both completed a questionnaire. Perinatal data were derived from midwives.

STI were present in 2.4% of pregnant women (CT 1.8%, NG 0.4%, TV 0.4%), and in 2.2% of male partners (CT 2.2%, NG 0.2%, TV 0%). Of women ≤ 20 years, 12.5% had a CT infection. Prevalent STI during pregnancy was associated with female young age, male non-Western background, and female with ≥ 2 sex partners < 12 months. APO was not associated with STI, but was associated with female low education, complications with previous newborn, and short duration of the relationship. Small-for-gestational-age was not associated with STI, but was associated with female low education, female non-Western background, and both parents smoking during pregnancy.

Prevalence of STI was low among pregnant women and male partners in midwifery practices, except for CT among young women. The study could not confirm previously observed associations between STI and APO. Probably due to low prevalence of STI, small study sample, and presumed treatment for STI.

Religion and the Risks of Sexually Transmissible Infections: Evidence from Britain

Although a growing body of literature has explored the association between religion and the prevalence of sexually transmissible infections (STIs), the focus has mainly been on HIV/AIDS and developing countries. Using data from the British National Surveys of Sexual Attitudes and Lifestyles (Natsal), we examine the direct association between religion and the prevalence of STIs including individual perception of exposure and risk of STIs. We focus on the importance of religion to respondents, religious affiliation as well as frequency of attendance to religious meetings. Our analyses suggest that being religious and frequently attending religious meetings are associated with lower odds of being diagnosed with STIs as well as lower self-assessed risk of getting HIV/AIDS. This seems particularly true for adherents of Christianity and more specifically, those of the Catholic denomination.

Adolescents' Contraceptive Use with School-Discordant Partners: Exploring Individual- and Relationship-Level Characteristics

CONTEXT

Heterosexual adolescents are less likely to use contraceptives when their partners are of different backgrounds or social circles. It is unclear why risky behaviors are more common within these relationships, and characteristics associated with school-discordant partners-that is, partners who do not attend the adolescent's school-are particularly understudied.

METHODS

Characteristics of romantic relationships and contraceptive use were examined among 1,043 female and 961 male respondents in Waves 1 (1994-1995) and 2 (1996) of the National Longitudinal Study of Adolescent to Adult Health. Generalized linear regression and structural equation models identified individual- and relationship-level characteristics that were associated with school-discordant relationships and contraceptive use.

RESULTS

For females, the likelihood of ever having used a condom with a partner was reduced when that partner had not attended her school at the start of the relationship (odds ratio, 0.5) or when he was two or more years older (0.6). Notably, however, having a school- or age-discordant partner was not associated with ever having used hormonal or dual methods for females, or with any contraceptive measures for males. For females, lower emotional intimacy with school-discordant partners was positively associated with ever having used condoms with such partners (1.2).

CONCLUSIONS

Characteristics of school-discordant relationships are correlated with condom use in varying and sometimes countervailing ways. Future research examining the mechanisms linking school discordance to decreased condom use, particularly for females, would deepen understanding of the emotional and psychosocial processes involved in adolescents' sexual and contraceptive behavior.

Out of school female adolescent employment status and sexually transmitted infections (STIs) risk in Uganda: is it a plausible relationship?

BACKGROUND

High prevalence of Sexually Transmitted Infections (STIs) among adolescents is a serious public health concern. Although many factors are attributed to adolescents' risk of STI infections, the association between out of school adolescents' employment status and STIs has not been thoroughly explored in Uganda, yet many adolescents are known to be employed. Consequently, the extent to which adolescents' employment status may be a risk factor for unprotected sex and STIs among female adolescents is unclear. This study examines the association between female out of school adolescents' employment status and STI status using the Uganda Demographic and Health Survey (UDHS) data for 2016.

METHODS

Both descriptive and multilevel binary logistic regressions were used to analyse the data. The descriptive statistics provided an overview of the association between the two main variables while the multilevel binary logistic estimated the relationship between employment status and STI status, while controlling for other fixed factors and community random factors.

RESULTS

Compared to female adolescents who were not employed or not working, the odds of reporting positive STIs were significantly higher for female adolescents who were working but received no pay (1.801(95% CI = 1.105-2.936), were self-employed in agriculture (1.502 (95% CI = 1.003-2.250) and who did manual jobs (2.258(95% CI = 1.429-3.568) whether skilled or not. Likewise, female adolescents who had two or more lifetime sexual partners (11.679 (95% CI = 1.254-2.248) had significantly higher odds of reporting STIs than those who had only one lifetime sexual partner.

CONCLUSION

Out of school female adolescents who are employed in various types of low wage employments are at greater risk of exposure to STIs than their counterparts who do not work in Uganda. Instead of being a protective factor against the risk of STIs, their employment may expose them to risky sexual behaviour and STIs, given the vulnerabilities female adolescents who have dropped out of school tend to report. Therefore, the provision of decent employment opportunities for these females may provide an avenue for instructional scaffolding to build the life skills and empower these females so that they are better able to reduce their exposure to STIs.

Sexual Networking and Partner Characteristics Among Single, African, Caribbean, and Black Youth in Windsor, Ontario

The disproportionate HIV burden shared by African, Caribbean, and Black (ACB) populations in Canada has not been explained by unique sexual behaviors in this population. This study investigates partner selection and sexual networking as potential contributors to HIV vulnerability. The study examines variations in the characteristics of sexual partners and sexual networking across groups based on differences in ethno-religious identity, gender, and length of Canadian residency among single, 16- to 27-year old, heterosexual-identified, ACB individuals living in Windsor, Ontario, Canada. Respondent-driven sampling maximized the representativeness of the sample of 250 (45 % male; 55 % female) youth with penile-vaginal intercourse experience who completed surveys. Logistic regression and analysis of variance compared groups with respect to number of lifetime partners, concurrency of sexual relationships, non-relational and age disparate partnering, and intra-ethnic sexual networking. For vulnerability associated with number of partners, concurrency and non-relational sex, women, newcomers to Canada, and African-Muslim participants were at lower vulnerability for HIV infection than their comparator groups. For vulnerability associated with sexual networking within a group with higher HIV prevalence, women and newcomers to Canada were at higher vulnerability to HIV infection than their comparator groups. There were insufficient data on age disparate partnering to support analysis. These results point to the importance of considering characteristics of partners and sexual networking both in further research and in developing policies and programs to curtail the spread of HIV and other sexually transmitted infections.

Violence Victimization, Social Support, and Papanicolaou Smear Outcomes: A Longitudinal Study from Adolescence to Young Adulthood

BACKGROUND

African American youth are among those at greatest risk for experiencing violence victimization. Notably, the mortality rate of cervical cancer for African American women is also twice that of white women. To date, we know of no literature using longitudinal data to examine how violence victimization relates to Papanicolaou (Pap) smear results or cervical cancer in this population. Our study examines how violence victimization during adolescence (age 15 to 18) influences psychological distress, perceived social support, heavy substance abuse, and sexual risk behaviors during emerging adulthood (age 20 to 23), and subsequent Pap smear outcomes during young adulthood (age 29 to 32).

METHOD

This study is based on 12 waves of data collected in a longitudinal study of 360 African American women from mid-adolescence (ninth grade, mean age = 14.8 years) to young adulthood (mean age = 32.0 years). We used structural equation modeling analysis to examine the hypothesized model.

RESULT

Violence victimization during adolescence had a direct effect on decreased social support, increased psychological distress, and increased heavy cigarette use during emerging adulthood. Better social support was also associated with fewer sexual partners during emerging adulthood and lower odds of abnormal Pap smear results during young adulthood. The effect of violence victimization on abnormal Pap smear was mediated by social support.

CONCLUSION

Our results show that violence victimization during adolescence has long-term negative effects through multiple pathways that persist into adulthood. Our findings also suggest that social support may help to compensate against other risk factors. Interventions designed to address the perceived support may help victims cope with their experience.

Early impact of Ontario's human papillomavirus (HPV) vaccination program on anogenital warts (AGWs): A population-based assessment

INTRODUCTION

This study aimed to evaluate the early population impact of Ontario's school-based human papillomavirus (HPV) vaccination program, implemented in September 2007 for grade 8 females, by comparing anogenital wart (AGW) health care utilization before and after vaccine program implementation, in program-eligible and program-ineligible cohorts, focusing on 15-26year olds.

METHODS

Using a retrospective longitudinal population-based study design, health administrative data were used to identify incident AGWs and total health service utilization (HSU) for AGWs for Ontario residents 15years and older between April 1 2004 and March 31 2014. The study period was divided into two eras: the pre-vaccine program era and the vaccine program era. Negative binomial models were generated to analyze trends across time by age group and sex. We adjusted female rates for routine Papanicolaou (Pap) testing to address spillover effects of Pap smear policy changes on AGW diagnosis.

RESULTS

Between fiscal years 2004 and 2013, AGW incidence decreased 2.6% on average per year in 15-17year old females, and total HSU for AGWs decreased an average of 4.8% and 2.2% per year in 15-17 and 18-20year old females. Comparing the vaccine era to the pre-vaccine era, AGW incidence decreased 6.5% in 18-20year old females, and AGW HSU decreased 13.8%, 11.1%, and 10.0% in 15-17, 18-20, and 21-23year old females respectively. In contrast, male AGW incidence rates increased an average of 4.1%, 2.8%, and 0.9% per year in 15-17, 21-23, and 24-26year old males respectively. AGW incidence rates increased 12.2% in 15-17year old males from the pre-vaccine to vaccine era.

CONCLUSION

The decline in AGW incidence and HSU in program-eligible females suggests the school-based HPV vaccination program has had an early population impact in Ontario. The increasing AGW incidence in males suggests no early evidence of herd effects in males.

Factors Associated with Self-Reported HIV Testing Among Persons 18 Years and Over in the United States - Findings from the 2012 Behavioral Risk Factor Surveillance System (BRFSS)

BACKGROUND

The Centers for Disease Control and Prevention (CDC) estimates that 14 percent of persons infected with HIV in the United States (US) are unaware of their infection and many of the estimated 50,000 new HIV infections each year are transmitted by people who do not know that they are HIV-positive. HIV testing is an important component of HIV prevention. This study examined predictors of self-reported HIV testing among persons 18 years and over in the US.

METHODS

Data from the 2012 BRFSS were utilized. We used univariate analysis to calculate relative frequencies for gender, race or ethnicity, age, education, income, marital status, region of residence, and having engaged in HIV/AIDS risky behaviors to characterize the overall sample. We conducted bivariate analysis for an initial assessment of factors independently associated with HIV testing. Multivariable logistic regression models were used to obtain the Adjusted Odds Ratios (AORs) and 95% Confidence Intervals (95% CIs) for factors associated with getting tested for HIV. Analyses were conducted using SAS version 9.2.

RESULTS

Of the 439,327 respondents, 30% had been tested for HIV. Of those who had been tested for HIV, 59% were female; 41% were two or more races and 47% were between 18-44 years of age. The majority (39%) of the respondents were college graduates. Over one-third (31%) of the participants who had been tested had annual household incomes which were less than $25,000. Half (50%) were married and 24% of the respondents were from the Western region of the US. Five percent of the respondents reported that they had engaged in HIV/AIDS risky behaviors. Factors associated with lower odds of getting tested included being Asian (AOR=0.56; 95% CI=0.41, 0.78); Native Hawaiian or Other Pacific Islander (AOR=0.42; 95% CI=0.18, 0.90); and having an income between $25,000 to $49,000 (AOR=0.82; 95% CI=0.78-0.87); $50,000 to $74,999 (AOR=0.86; 95% CI=0.79-0.93); or $75,000 or more (AOR=0.87; 95% CI=0.81-0.94). Also, respondents from the Midwest (AOR=0.78; 95% CI=0.73, 0.83) and the West (AOR=0.88; 95% CI=0.83, 0.93) were less likely to get tested for HIV. Our adjusted analyses also showed that being non-Hispanic Black or African American, Hispanic or Latino, identifying as having two or more races, and being American Indian or Alaska Native increased the likelihood of getting tested for HIV. Having engaged in HIV/AIDS risky behaviors had significantly higher odds of being tested for HIV (AOR=2.45; 95% CI=2.19, 2.74).

CONCLUSION

Our findings suggest that the HIV/AIDS prevention education and training programs in the US that have focused on traditionally classified high-risk populations have been effective. Findings from this study uncover an interesting paradox, which suggests that populations with higher incomes have been overlooked in efforts to combat HIV/AIDS. Our results suggest that these populations are at greatest risk of not knowing their HIV status and are therefore most likely to unknowingly contribute to the number of new HIV infections. Future research on multiple interacting factors that affect HIV testing behaviors should be considered top priorities. This is of upmost importance because knowing one's HIV status allows those who are infected to seek and receive treatment and prevention services, which are designed to improve health and reduce the likelihood of further transmission.

Degree and correlates of sexual mixing in female sex workers in Karnataka, India

Background The degree of sexual mixing plays an important role in understanding disparities in sexually transmissible infections and HIV across social groups. This study examines the degree of sexual age mixing, and explores its individual and partnership level correlates among female sex workers (FSWs) in Karnataka, India.

METHODS

Data were drawn from special behavioural surveys conducted in 2006-07 among 577 FSWs in two districts of Karnataka: Belgaum and Bangalore. Sexual mixing in age was assessed as the difference in age between FSWs and their sexual partners, and the degree of assortativeness in sexual mixing was assessed using Newman's assortativity coefficient.

RESULTS

A total of 577 FSWs were interviewed; 418 of whom reported two or more partnerships, resulting in 942 partnerships. In about half (52%) of these partnerships, the age difference between the FSW and her sexual partner was 5 years or more. The degree of assortativity in age mixing was 0.098, indicating minimally assortative mixing. The disassortativeness in age mixing was positively associated with young age and no formal education, and negatively with duration in sex work. Partnerships which were of a commercial nature were more likely to be disassortative than noncommercial partnerships.

CONCLUSION

The minimally assortative age mixing indicates sexually transmissible infections can transfer from members of one age group to another. Efforts are required to limit the transmission of infection from one group to other by promoting safer sexual behaviour.

Racially and ethnically diverse schools and adolescent romantic relationships

Focusing on romantic relationships, which are often seen as a barometer of social distance, this analysis investigates how adolescents from different racial-ethnic and gender groups respond when they attend diverse schools with many opportunities for inter-racial-ethnic dating. Which groups respond by forming inter-racial-ethnic relationships, and which groups appear to "work around" opportunities for inter-racial-ethnic dating by forming more same-race-ethnicity relationships outside of school boundaries? Most prior studies have analyzed only relationships within schools and, therefore, cannot capture a potentially important way that adolescents express preferences for same-race-ethnicity relationships or work around constraints from other groups' preferences. Using the National Longitudinal Study of Adolescent Health, I find that, when adolescents are in schools with many opportunities for inter-racial-ethnic dating, black females and white males are most likely to form same-race-ethnicity relationships outside of the school; whereas Hispanic males and females are most likely to date across racial-ethnic boundaries within the school.

The influence of sexual partner on condom use among urban adolescents

PURPOSE

The influence of partner context (e.g., drinking alcohol in the 2 hours prior to sex, ≥3 years age discordant, met in public) on adolescent boys' and girls' condom use is unclear. Among an urban cohort of primarily (86%) minority 17-18-year-olds who reported having sex (n = 1,469), we assessed the association between condom use and partner characteristics for the most recent sexual experience.

METHODS

We used logistic regression to examine the odds of condom use by measured partner familiarity (casual or unexpected) and context characteristics. Analyses were stratified by gender.

RESULTS

Adolescent boys and girls were twice as likely to use condoms with partners they considered casual or unexpected. Adjusting for partner familiarity risk, adolescent boys' tended to decrease condom use with risky context partners. Adjusting for partner familiarity risk, adolescent girls were half as likely to use condoms with partners drinking alcohol 2 hours prior to sex [Odds Ratio (OR) = .6, 95% Confidence Interval (CI) = .4-.9]; ≥3 years age discordant (OR = .5, 95% CI = .3-.8); or met in public places (OR = .6, 95% CI = .4-.8).

CONCLUSIONS

Regardless of partner familiarity risk, adolescent boys and girls faced barriers to condom use with risky context partners. Increased understanding of adolescents' perceptions of and control over partner risk and condom use with risky context partners is needed. Interventions aimed at decreasing adolescent sexually transmitted infections should include strategies for adolescents to choose less risky context partners and negotiate condoms with risky context partners.

"A man's gonna do what a man wants to do": African American and Hispanic women's perceptions about heterosexual relationships: a qualitative study

BACKGROUND

HIV prevention efforts have given limited attention to the relational schemas and scripts of adult heterosexual women. These broader schemas and scripts of romantic and other sexual liaisons, partner selection, relationship dynamics, and power negotiations may help to better understand facilitators and barriers to HIV risk-reduction practices.

METHODS

We conducted exploratory qualitative interviews with 60 HIV-uninfected heterosexual African-American women from rural counties in North Carolina and Alabama, and Hispanic women from an urban county in southern Florida. Data were collected for relationship expectations; relationship experiences, and relationship power and decision-making. Interview transcripts underwent computer-assisted thematic analysis.

RESULTS

Participants had a median age of 34 years (range 18-59), 34% were married or living as married, 39% earned an annual income of $12,000 or less, 12% held less than a high school education, and 54% were employed. Among the Hispanic women, 95% were foreign born. We identified two overarching relationship themes: contradictions between relationship expectations and desires and life circumstances that negated such ideals, and relationship challenges. Within the contradictions theme, we discovered six subthemes: a good man is hard to find; sex can be currency used to secure desired outcomes; compromises and allowances for cheating, irresponsible, and disrespectful behavior; redefining dating; sex just happens; needing relationship validation. The challenges theme centered on two subthemes: uncertainties and miscommunication, and relationship power negotiation. Gender differences in relationship intentions and desires as well as communication styles, the importance of emotional and financial support, and the potential for relationships to provide disappointment were present in all subthemes. In examining HIV risk perceptions, participants largely held that risk for HIV-infection and the need to take precautions were problems of women who differed from them (i.e., abuse drugs, are promiscuous, exchange sex).

CONCLUSION

Underlying women's relational schemas was a belief that relationship priorities differed for men and women. Consequently, expectations and allowances for partner infidelity and negligent behaviors were incorporated into their scripts. Moreover, scripts endorsed women's use of sex as currency in relationship formation and endurance, and did not emphasize HIV risk. Both couple- and gender-specific group-level interventions are needed to deconstruct (breakdown) and reconstruct (rewrite) relationship scripts.

Racial/ethnic differences in patterns of sexual risk behavior and rates of sexually transmitted infections among female young adults

OBJECTIVES

We examined patterns of sexual behavior and risk for sexually transmitted infections (STIs) in young adulthood for Black, Hispanic, and White females.

METHODS

We used a nationally representative sample of 7015 female young adults from wave III of the National Longitudinal Study of Adolescent Health. Sexual risk items assessed behaviors occurring in the previous 6 years and past year to determine classes of sexual risk and links to STIs in young adulthood.

RESULTS

Latent class analysis revealed 3 sexual risk classes for Black and Hispanic youths and 4 sexual risk classes for White youths. The moderate and high risk classes had the highest probabilities of risky sexual partners, inconsistent condom use, and early age of sexual initiation, which significantly increased odds for STIs compared with recent abstainers.

CONCLUSIONS

We found different classes of sexual behavior by race/ethnicity, with Black and Hispanic young women most at risk for STIs in young adulthood. Preventive efforts should target younger adolescents and focus on sexual partner behavior.

Concurrent sexual partnerships among urban African American high-risk women with main sex partners

To determine correlates of concurrent sexual partnerships among high-risk low-income urban African American women, survey responses of 337 women who had main sexual partners for over 6 months and reported high-risk behaviors were analyzed; 142 of these women also reported other sexual partnerships within the past 90 days. Unadjusted analyses showed that concurrency was significantly associated with relationship status, sexual debut, forced sex, incarceration of self and partners, depression, drug use, known or suspected partner nonmonogamy, and partner drug use. Age of sexual debut, relationship status, and indicators of problem drug use remained significantly associated with concurrency when controlling for individual factors, and only indicators of problem drug use and known or suspected partner nonmonogamy remained significantly associated with concurrency when also controlling for partner characteristics. Our results suggest the presence of extensive sexual networks within this population and document the need for interventions that address drug abuse and partnership instability. Moreover, the strong association between concurrency and perceptions of partners' nonmonogamy suggest the need for intervention to target men and women in this core group.

Contraceptive method choice among youth in the United States: the importance of relationship context

We examine the relationship characteristics associated with contraceptive method choice within young people's nonmarital sexual relationships, using data from retrospective relationship histories available in the third wave (2001-2002) of the National Longitudinal Study of Adolescent Health. Data-reduction techniques produce a detailed multidimensional characterization of relationship commitment for nonmarital sexual relationships. We then use multilevel analysis to estimate associations between two key relationship characteristics-relationship commitment and couple heterogamy-and the type of contraceptive method used at last sexual intercourse within each relationship. Results indicate that for a given individual, contraceptive method choice varies across relationships as a function of these characteristics, even after we account for important individual and family characteristics and prior relationship experiences.

Jamaican adolescent girls with older male sexual partners

PURPOSE

The purpose of this study was to describe the relationships between adolescent girls and older male sexual partners in urban Kingston, Jamaica, and identify the human immunodeficiency virus (HIV)-related sexual risks that occur within these relationships.

DESIGN

The study employed a descriptive qualitative design.

METHODS

Data were collected through focus groups and individual interviews conducted with 43 late adolescent girls (18-21 years old). An age-discordant relationship was defined as a sexual relationship between a Jamaican adolescent female and a man who was 2 or more years older. Data were analyzed using qualitative content analysis.

FINDINGS

Age-discordant relationships were common and often began when girls were early adolescents. Both adolescent girls and older men tended to have multiple partners, and transactions of gifts, money, or resources from an older partner were expected and common. Older partners were highly influential in HIV-related risk behaviors.

CONCLUSIONS

Age-discordant relationships need to be explicitly addressed in HIV prevention programs for adolescent girls in Jamaica. Further, the implications of gift-giving, informal sexual transactions, and intradyadic power must be incorporated into strategies for reducing HIV-related sexual risk with older partners. Future studies should examine the perspectives of Jamaican men.

CLINICAL RELEVANCE

This study found that many Jamaican adolescent girls engage in sexual relationships with older men and that the unique characteristics of these relationships may increase girls' risks for HIV and other sexually transmitted diseases. HIV risk reduction interventions for adolescent girls should address sexual risks associated with older male partners.

Individual and Neighborhood Correlates of HIV testing among african american youth transitioning from adolescence into young adulthood

Disparities in HIV testing rates exist among socially disadvantaged communities. Using a longitudinal sample of urban African American youth followed from adolescence into young adulthood (n = 396; 51% female), we examined whether HIV testing was associated with individual (e.g., gender, socioeconomic status [SES], education, and history of sexually transmitted infections [STIs]) and area (i.e., neighborhood disadvantage and HIV prevalence) characteristics. In our multilevel regressions, we found females were more likely to have tested for HIV, with the magnitude of this association increasing if they lived in areas of greater disadvantage yet decreasing in higher HIV prevalence areas. Those without a high school degree, with a lower SES, or with a history of STIs in adolescence were less likely to test if they lived in greater disadvantage and HIV prevalence areas. We discuss the implications of these findings from an ecological perspective and propose recommendations for increasing testing among African American youth.

Relationship trajectories and psychological well-being among sexual minority youth

Dating in adolescence plays an integral part in the development of sexual and social identities. This process is particularly salient for sexual minority youth who face additional obstacles to their identity formation due to their marginalized status. We investigated the influence of participating in a same-sex relationship (SSR) or an opposite-sex relationship (OSR) on sexual minority youths' psychological well-being (i.e., symptoms of depression, anxiety and internalized homophobia, and self-esteem) in an ethnically-diverse sample of 350 youth (55% male) between the ages of 15-19 years, recruited from three GLBT drop-in centers in the New York City area. Using longitudinal data, we examined youths' SSR and OSR over time. Multivariate regression analyses suggest that involvement in a SSR was positively associated with changes in self-esteem in males, and negatively correlated with changes in internalized homophobia in females. We discuss the implications for positive development in sexual minority adolescent populations.

What predicts sex partners' age differences among African American youth? A longitudinal study from adolescence to young adulthood

Partner age is associated with youth's sex risk behaviors and sexually transmitted infections. At present, however, it is not known whether the co-occurrence of other risk behaviors is associated with having older sex partners during adolescence and young adulthood. Using growth curve modeling, this study first describes the shape of the age difference between participants and their sex partners across adolescence and young adulthood in a sample of African American youth. Second, whether this model varied systematically by sex, mother's education, and high school dropout was tested. Third, whether age differences were associated with youth's self-acceptance, alcohol use, and employment trajectories over these two developmental periods was assessed. Finally, whether these associations had non-proportional effects over both periods was tested. This study modeled sex partners' age differences nonlinearly, with females being more likely to date older partners at baseline and over time. High school dropouts also reported older partners at baseline. Self-acceptance and the number of hours worked were associated with sex partners' age differences over time, with the effect decreasing over young adulthood years. Alcohol use frequency was also associated with having older partners over time. This study discusses the findings from a health perspective on youth's sexual development.

Intimate partner violence and other partner-related factors: correlates of sexually transmissible infections and risky sexual behaviours among young adult African American women

BACKGROUND

Intimate partner violence and other partner-related factors have been associated with acquiring sexually transmissible infections (STIs) and engaging in risky sexual behaviour. The present study examined partner-related risk factors for STIs and risky sexual behaviours among an urban sample of African American women.

METHODS

African American women, between 18 and 29 years (n = 848), participated in the study at baseline. Participants completed a 40-min Audio Computer Assisted Survey Interview assessing sociodemographics, partner-related factors and HIV/STI-associated sexual risk behaviours. Subsequently, participants provided two vaginal swab specimens for STIs.

RESULTS

The findings indicated that risky sexual behaviours and STIs were prevalent in this sample: 35.6% reported a risky sexual partner, 65.4% reported inconsistent condom use and 17% tested positive for a laboratory-confirmed STI. Women reporting a history of intimate partner violence were more likely to report risky sexual partners (adjusted odds ratio (AOR) = 2.00; 95% confidence interval (CI) = 1.5-2.8), inconsistent condom use (AOR = 1.60; 95% CI = 1.1-2.3) and test positive for an STI (AOR = 1.46; 95% CI = 0.99-2.1). Women reporting high partner-related barriers to condom use were more likely to report risky sexual partners (AOR = 1.69; 95% CI = 1.2-2.3), inconsistent condom use (AOR = 2.13; 95% CI = 1.5-3.0) and test positive for an STI (AOR = 1.98; 95% CI = 1.3-3.0). Finally, women with older partners were more likely to report risky sexual partners (AOR = 1.53; 95% CI = 1.1-2.1) and test positive for an STI (AOR = 1.46; 95% CI = 1.0-2.2).

CONCLUSIONS

This study examines partner-related risk factors for STIs and risky sexual behaviours among African American women. These findings underscore the need for combined intimate partner violence and HIV/STI prevention programs for this disproportionately affected high-risk group.

Older romantic partners and depressive symptoms during adolescence

Although developmental theory predicts that adolescent romantic relationships have important benefits, empirical evidence suggests that they may also carry substantial psychosocial risk. This study uses data from 4,948 respondents (50% female) in Wave I and Wave II of the National Longitudinal Study of Adolescent Health to examine the association between involvement with an older romantic partner and depressive symptoms during adolescence. Ordinary least squares regression models compared Wave II depressive symptoms among respondents with older partners (defined as an age difference of 2 or more years) to respondents with same-age or younger partners, controlling for baseline depressive symptoms and sociodemographic characteristics. Ten percent of females and two percent of males reported having an older romantic partner at Wave II. Among females only, involvement with an older romantic partner was associated with a modest but significant increase in depressive symptoms between waves. This association was largely mediated by increases in substance use. Findings suggest that involvement with an older male partner during adolescence may increase the risk of poor emotional outcomes among females.

Sexually transmitted infection prevalence and behavioral risk factors among Latino and non-Latino patients attending the Baltimore City STD clinics

BACKGROUND

Many studies have evaluated factors influencing sexually transmitted diseases (STD)/HIV disparities between black and white populations, but fewer have explicitly included Latinos for comparison.

METHODS

We analyzed demographic and behavioral data captured in electronic medical records of patients first seen by a clinician in 1 of 2 Baltimore City public STD clinics between 2004 and 2007. Records from white, black, and Latino patients were included in the analysis.

RESULTS

There were significant differences between Latinos and other racial/ethnic groups for several behavioral risk factors studied, with Latino patients reporting fewer behavioral risk factors than other patients. Latinos were more likely to have syphilis, but less likely to have gonorrhea than other racial/ethnic groups. English-proficient Latina (female) patients reported higher rates of infection and behavioral risk factors than Spanish-speaking Latina patients. After adjustment for gender and behavioral risk factors, Spanish-speaking Latinas also had significantly less risk of sexually transmitted infections than did English-speaking Latinas.

CONCLUSIONS

These results are consistent with other studies showing that acculturation (as measured by language proficiency) is associated with increases in reported sexual risk behaviors among Latinos. Future studies on sexual risk behavior among specific Latino populations, characterized by country of origin, level of acculturation, and years in the United States, may identify further risk factors and protective factors to guide development of culturally appropriate STD/HIV interventions.

Prevalence and risk factors for adult paternity among adolescent females ages 14 through 16 years

To investigate sociodemographic factors associated with adolescent females ages 14-16 years having children fathered by males age 20 years or older and identify differences in correlates across rural, urban, and border areas. The method section was a cross-sectional study using Texas birth record data. From 2000 through 2004, there were 29,186 births to adolescent females aged 14-16 years with valid paternal age. Prevalence of and adjusted odds of paternal age of 20 years or older were identified by paternal and maternal factors. The Results section Having both parents born outside of the U.S. was associated with a 5.29 (95% CI: 4.82, 5.80) times increase in the odds of paternal age of 20 years or older as compared to having both parents born in the U.S. Parental place of birth was associated with greater odds of paternal age of 20 years or older in urban areas compared to rural or border areas. Compared to those with average or high educational attainment relative to age, low educational attainment relative to age was associated with an increase in the odds of paternal age of 20 years or older. This association was present whether maternal or paternal educational attainment was low relative to age. Messages are needed to help adolescent females avoid pregnancy with adult males. In addressing this specific prevention challenge, it is important to consider maternal/paternal place of birth and its association with adolescent births with adult males.

Working, sex partner age differences, and sexual behavior among African American youth

Participation in the workplace has been proposed as a potential structural-level HIV/STI prevention strategy for youth. Only a few cross-sectional studies have explored the effect of work during adolescence and young adulthood on sexual behavior and their results have been mixed. This study builds on this literature by exploring whether work influences youths' sexual behavior in a cohort of African American youth (N = 562; 45% males; M = 14.5 years, SD = 0.6) followed from adolescence to young adulthood (ages 13-25 years). Using growth curve modeling, we tested whether working was associated with older sex partners. Then, we explored the association between sex partner age differences and sexual behaviors (i.e., number of sex partners, condom use, and frequency of sexual intercourse). Finally, we tested whether the relationship between sex partner age differences and sexual behaviors was confounded by working. Working greater number of hours was not significantly associated with having older sex partners. Sex partner age differences was associated with number of partners, condom use, and higher sex frequency. These associations were larger for females. Working was associated with higher sex frequency, after accounting for age differences. We discuss the implications of these findings for future research and program planning, particularly in the context of youth development programs.

Social and behavioral correlates of sexually transmitted infection- and HIV-discordant sexual partnerships in Bushwick, Brooklyn, New York

INTRODUCTION

The Centers for Disease Control and Prevention (CDC) advise repeat HIV testing for partners of HIV-infected persons; injection drug users and their sex partners; individuals with recent multiple partnerships and their sex partners; those involved in sex trade; and men who have sex with men. Additional social and behavioral variables may be useful for identifying priority populations.

METHODS

We analyzed data collected during a social network study conducted in a Brooklyn, NY, neighborhood to identify social and behavioral characteristics of respondents (N = 343) involved in HIV-discordant, herpes simplex virus-2- discordant, and chlamydia-discordant partnerships.

RESULTS

HIV partnership discordance was associated with injection drug use but was generally not associated with sexual behaviors including multiple partnerships and sex trade. herpes simplex virus-2 and chlamydia partnership discordance were associated with multiple partnerships, sex trade, and same sex partnership history. Additional correlates of sexually transmitted infection (STI)/HIV-discordant partnerships included older age (>or=25 years), noninjection drug use, and incarceration history. Analyses suggested that screening tools composed of CDC-recommended sexual risk and injection drug indicators plus indicators of older age, noninjection drug use, and incarceration were more effective in identifying STI/HIV priority populations than tools composed of CDC indicators alone.

CONCLUSIONS

Screening tools that include social and behavioral indicators may improve STI/HIV case-finding effectiveness.

Depressive symptoms and sexual risk behavior in young, chlamydia-infected, heterosexual dyads

PURPOSE

To examine associations between depressive symptoms and dyad-level sexual risk behavior in young heterosexual dyads with sexually transmitted infection (STI).

METHODS

Chlamydia-positive 14-24-year-old, heterosexually active outpatients and their opposite-sex partners completed an assessment that included demographics, past and recent STI risk behaviors, and the Beck Depression Inventory (BDI). Participants in the top 25% of BDI scores within gender were categorized as depressed. Variables were created to identify dyads in which the female or male partner was depressed, as well as a measure of concordance of depression between partners. Dyad-level STI risk variables were created from the STI risk characteristics reported by each dyad member, and associations between these and the depression variables were analyzed.

RESULTS

The 130 dyads were comprised of young men and women at high STI risk. One-third of dyads had at least one depressed partner. Dyads in which the female partner was depressed had greater partner age difference, greater total number of lifetime partners, and one or more partners reporting substance use within 2 hours before sex, compared with dyads in which the female partner was not depressed. Dyads in which the male partner was depressed were more likely than the nondepressed-male dyads to report substance use before sex. All dyads in which both partners were depressed reported substance use before sex.

CONCLUSIONS

In young, chlamydia-infected, heterosexual dyads, depressive symptoms, especially in women, is related to increased dyad-level STI risk, including greater partner age difference, more partners, and substance use before sex.

Condom use and consistency among male adolescents in the United States

PURPOSE

To incorporate a behavioral model of health services utilization to examine whether male adolescents' family, individual, sex education, and partner factors are associated with several measures of condom use and consistency in heterosexual relationships.

METHODS

We examine a sample of sexually experienced male adolescents 15-19 years of age in the 2002 National Survey of Family Growth (NSFG) to identify factors associated with condom use at first sex and last sex, condom consistency with their most recent sexual partner, and condom consistency in the past 4 weeks.

RESULTS

Male adolescents who were Hispanic and those who did not receive formal sex education had lower odds of condom use and/or consistency, whereas African-American male adolescents and those with more positive attitudes about condoms had greater odds. Males who were older at most recent sex, who had an older sexual partner or a casual first sexual partner, who had a partner who used a method of contraception, who were in longer relationships, or who engaged in more frequent sex had reduced odds of contraceptive use.

CONCLUSIONS

Findings highlight multiple domains of influence on condom use behaviors among male adolescents. Programs that provide targeted services, address condom use attitudes, and help teens to negotiate condom use decision making with sexual partners may help to reduce high rates of sexually transmitted infections among male adolescents in the United States.

Partner age difference and prevalence of chlamydial infection among young adult women

OBJECTIVES

Sexual partner mixing by age is common among adolescents and adults. Although adolescent girls with older male partners are at increased risk of sexually transmitted infection, the importance of this association in young adults is unclear.

GOAL

To assess the association between partner age difference and prevalence of chlamydial infection among young women.

STUDY DESIGN

Using Wave III of the National Longitudinal Study of Adolescent Health (April 2, 2001-May 9, 2002), the authors examined the relation between the prevalence of chlamydial infection and the partner age among women aged 18 to 26 years.

RESULTS

Among women with most recent partners 2 to 8 years younger, the odds of chlamydial infection were approximately 2 times greater [adjusted odds ratio (OR), 1.8; 95% confidence interval (CI), 0.9, 3.5] than among women with partners within 1-year age difference, adjusting for number of partners in the past year. Prevalence of chlamydial infection was only slightly greater for women with partners 2 to 5 years older (adjusted OR, 1.4; 95% CI, 0.9, 2.3) and partners 6 or more years older (adjusted OR, 1.6; 95% CI, 0.9, 2.8), when compared with women with partners within 1-year age difference. The relation between most discordant partner age difference and chlamydial infection seems to vary by women's race/ethnicity, although these stratified estimates are imprecise.

CONCLUSIONS

These findings suggest that among young adult women, in contrast to adolescents, older male partners are only moderately associated with the prevalence of chlamydial infection. Young adult women have the lowest odds of infection with partners within 1 year of age difference.

Behavior in early adolescence and risk of human papillomavirus infection as a young adult: results from a population-based study

OBJECTIVE

The goal of this study was to determine the utility of a risk factor-based approach to human papillomavirus catch-up vaccination.

METHODS

Data from waves I and III of the National Longitudinal Study of Adolescent Health were examined to determine the association between adolescent characteristics and future human papillomavirus infection. Analysis was restricted to 3181 female subjects who were >12 years of age when risk factors were assessed in wave I (1994-1995) and who underwent human papillomavirus testing as young adults in wave III (2001-2002). The main outcome of interest was a positive test result for >or=1 of 4 human papillomavirus types (human papillomavirus-6, -11, -16, or -18) targeted by the human papillomavirus vaccine currently available in the United States. Separate analyses were performed for sexually active and virginal adolescents. Poststratification sampling weights were used to generate nationally representative estimates.

RESULTS

Although nearly one half (43%) of the female adolescents were sexually active in wave I, adolescent sexual activity status was not associated with future detection of vaccine-specific human papillomavirus infection. Furthermore, for both virginal and sexually active adolescents, none of the assessed risk factors was associated with increased odds of future vaccine-specific human papillomavirus infection in multivariate models. Similar results were obtained when all high-risk human papillomavirus types were assessed as the outcome measure.

CONCLUSIONS

Behavioral risk factors assessed during adolescence are inadequate predictors of future infection with vaccine-type human papillomavirus. A risk factor-based approach to human papillomavirus catch-up vaccination is unlikely to be an effective implementation strategy.

Older sexual partners during adolescence: links to reproductive health outcomes in young adulthood

CONTEXT

Sex at a young age with an older partner has been linked to poor reproductive health outcomes during adolescence, but minimal research has examined the influence of teenagers' having an older sexual partner on reproductive health outcomes during the transition to young adulthood.

METHODS

Logistic regression and contrast analyses of three waves of data from the National Longitudinal Study of Adolescent Health were used to examine whether individuals who had had sex before age 16 with a partner at least three years their senior were at increased risk of becoming teenage or unmarried parents or of contracting an STD by young adulthood.

RESULTS

Ten percent of females and 2% of males had had early sex with an older partner. These females were more likely to acquire an STD as young adults than were those whose riskiest relationship was before age 16 with a similar-aged partner (odds ratio, 2.1) or at age 16 or later with a similar-aged or older partner (2.4 and 2.6, respectively). For males, having sex before 16, regardless of partner age, was associated with an elevated STD risk (odds ratio, 1.9), although controlling for relationship history characteristics attenuated the association.

CONCLUSIONS

Adolescents, particularly young adolescents, should be made aware of the potential risks associated with having older sexual partners. In particular, program providers should be alerted that females who engage in early sexual activity with older partners are at especially high risk of experiencing adverse reproductive health consequences.

Sexual behaviors and their correlates among young people in Mauritius: a cross-sectional study

Background

Little is known about the HIV/AIDS epidemic in the Indian Ocean region, including Mauritius. National records suggest a prevalence of HIV in Mauritius of < 1% in the general population, which is one of the lowest prevalence rates in southern Africa. However, HIV-positive cases have been increasing recently in Mauritius. We conducted a cross-sectional survey in January 2003 to assess the prevalence of HIVrelated sexual behaviors and their correlates among young people aged 15–24 years in Mauritius.

Methods

We identified 1200 participants using two-stage cluster sampling. Demographic, social, sexual, and knowledge of HIV/AIDS data were obtained in face-to-face interviews using a structured questionnaire administered by trained interviewers. The prevalence of sexual behaviors was described in relation to gender, and the correlates of ever having had sex and nonuse of condom at last sex were analyzed using logistic regression.

Results

In the target population, 30.9% of males and 9.7% of females reported a history of sexual intercourse. Of the currently sexually active participants, 50.6% of men and 71.2% of women did not use condoms at their last sexual encounter. Logistic regression revealed that work experience and marijuana use were significantly associated with men's sexual experience, whereas being out of school and drinking experience were significantly associated with women's sexual experience. For both men and women, being Christian and visiting nightclubs were associated with having ever had sexual intercourse (P < 0.05). In addition, not using a condom at the first sexual encounter and lack of exposure to a nongovernmental organization (NGO) dealing with HIV/AIDS were associated with the nonuse of condoms at the last sexual encounter (P < 0.05).

Conclusion

Young people in Mauritius are at risk of a future HIV epidemic because behaviors predisposing to HIV infection are prevalent among sexually experienced youth. A focused prevention program targeting young people should be reinforced as part of the National AIDS Control Program, taking into account the predictors of sexual behaviors identified here.

Peer selection and socialization effects on adolescent intercourse without a condom and attitudes about the costs of sex

This study investigated peer selection and socialization effects on sexual behavior and attitudes using 1,350 15- to 18-year-old students participating in two waves of the National Longitudinal Study of Adolescent Health. Regarding socialization effects, friends' intercourse without condoms predicted later individual intercourse without condoms positively. Friends' attitudes about the costs of sex predicted later individual attitudes positively and intercourse without condoms negatively. The latter relation was stronger for females than for males. Regarding selection effects, individual attitudes predicted later friends' attitudes positively, but the strength of this effect varied by ethnicity. The results suggest that adolescents socialize friends to have similar sexual attitudes and behavior but tend to select friends based on similar attitudes rather than similar behaviors.

Adolescents' discussions about contraception or STDs with partners before first sex

CONTEXT

Limited research has examined the individual, family and relationship factors that determine whether teenagers discuss contraception or STDs with their sexual partners before having sex for the first time.

METHODS

Logistic regression analyses of data from 1,426 teenagers who participated in Waves 1 (1995) and 2 (1996) of the National Longitudinal Study of Adolescent Health and who had first sex between waves examined factors influencing whether respondents discussed contraception or STDs with their partner before first sex, and whether these factors differ by gender.

RESULTS

Fifty-three percent of females and 45% of males discussed contraception or STDs before having first sex. The greater respondents' perceived condom knowledge and the greater their communication with their parents about everyday life, the higher their odds of discussing contraception or STDs before first sex (odds ratio, 1.2 for each). Being black was positively associated with sexual communication before first sex (1.9); as the number of dating activities and score on a test of verbal ability increased, so did the odds of such communication (1.6 and 1.02, respectively). The predictors of discussions about contraception or STDs did not differ by gender.

CONCLUSIONS

By increasing teenagers' knowledge about condoms and other methods of contraception, pregnancy and STD prevention programs can help to encourage communication among teenage partners before the initiation of sexual intercourse. Programs should also encourage conversations between parents and teenagers, even when not about sex.

Contraceptive use patterns across teens' sexual relationships: the role of relationships, partners, and sexual histories

By using data from the National Longitudinal Study of Adolescent Health, we examine how adolescent relationship characteristics, partner attributes, and sexual relationship histories are associated with contraceptive use and consistency, incorporating random effects to control for respondent-level unobserved heterogeneity. Analyses show that teens' contraceptive use patterns vary across relationships. Teens with more-homogamous partners, with more-intimate relationships, and who communicate about contraception before sex have greater odds of contraceptive use and/or consistency. Teens in romantic relationships, and who are older when engaging in sex for the first time, have greater odds of ever using contraceptives but reduced odds of always using contraceptives. Teens continue habits from previous relationships: teens with experience practicing contraceptive consistency and females who previously have used hormonal contraceptive methods are better able to maintain consistency in subsequent relationships. Also, relationship and partner characteristics are less important for females who previously used hormonal methods.

Older male sexual partner as a marker for sexual risk-taking in adolescent females in Nova Scotia

PURPOSE

To examine age differences between Nova Scotia women aged 15-19 and their male sexual partners, and to determine if those adolescents with older partners were more likely to have engaged in sexual risk-taking behaviours.

METHODS

A cross-sectional survey (response rate=91%) administered in May 2003 assessed the following sexual risk behaviours: (a) not using condom/hormonal contraception at last vaginal intercourse; (b) having unplanned vaginal intercourse while using alcohol or drugs; (c) having more than one partner in the previous year; (d) vaginal intercourse before age 15; and (e) ever having anal intercourse. Univariate analysis was carried out to determine associations of sexual risk behaviours with partner age difference. Logistic regression was then used to examine behaviours associated with partner age (p < 0.15) in univariate analysis.

RESULTS

Of the young women surveyed, 520 (47.7%) had had vaginal intercourse in the previous year; 515 of these provided information on their last partner's age. Over 10% had partners four or more years older. In multivariate analysis, having a partner > or =4 years older was associated with not using a condom at last intercourse (OR 2.15; 95% Cl 1.10-4.20), having more than one partner in the previous year (OR 21.9; 95% Cl 1.13-4.28) and having unplanned vaginal intercourse while using alcohol or drugs (OR 2.66; 95% Cl 1.34-5.28).

CONCLUSIONS

A significant number of female adolescents have older male sexual partners, and such relationships are markers for high-risk sexual behaviours. Partner age is an important consideration for health professionals providing sexual health advice to young women.

Comparison of self-reported and test-identified chlamydial infections among young adults in the United States of America

BACKGROUND

Many studies rely on respondent reports of prior diagnosed sexually transmissible infections (STIs), but these self reports are likely to under-estimate infection prevalence. The extent of bias from using self-reported STI data, and whether bias varies by sex and race, is largely unknown. This gap is addressed using a large, nationally representative sample.

METHODS

Cross-sectional analyses of Wave III of the National Longitudinal Study of Adolescent Health. Participants were 18-26 years old (n = 12,359). Estimates of the prevalence of chlamydial infection based on self-reported diagnoses in the past year were compared with actual prevalence based on nucleic acid amplification testing (NAAT) at the time of data collection. Ratios of test-identified prevalence to self-reported diagnosis prevalence were calculated by sex and race/ethnicity groups. Larger ratios indicate greater extent of self reports under-estimating infection prevalence.

RESULTS

About 4.2% of the sample had a current NAAT-identified chlamydial infection, but only 3.0% reported having been diagnosed with chlamydia in the past year, yielding a ratio of 1.43. The ratio of test-identified infection prevalence to prevalence identified from self-reported diagnoses was larger among men than women (2.07 versus 1.14, P < 0.05). Among men, the ratio was larger among non-Hispanic blacks (2.40) compared with non-Hispanic whites (1.07, P < 0.05).

CONCLUSIONS

Use of self-reported diagnoses under-estimates chlamydial infection prevalence, particularly among men, and among non-Hispanic black men. Reliance on self-reported STIs may consequently lead to biased conclusions, particularly for these groups. Use of biological testing for STIs in research studies is recommended.

Age-bridging among young, urban, heterosexual males with asymptomatic Chlamydia trachomatis

OBJECTIVES

To determine the prevalence of age-bridgers among urban males aged 14-24 years, asymptomatically infected with chlamydia and to determine factors that distinguish age-bridgers from non age-bridgers. An index was defined as an age-bridger if within 2 months, he had had at least two sexual partners who differed from him in age by > or =2 years.

METHODS

Infected males provided data about themselves and up to four sexual partners in the past 2 months. Bivariate and multivariable logistic regression was used in the analysis.

RESULTS

The prevalence of age bridging was 21% in Baltimore and 26% in Denver. In both cities, in bivariate analysis, age-bridgers and their partners engaged in significantly more risky sexual behaviours. In adjusted multivariable analysis after controlling for number of sexual partners, age bridging was associated with having a sexual partner in the past 2 months, who, at time of last sexual intercourse, was drinking.

CONCLUSION

Age-bridgers represented major proportions of the study populations and, along with their sexual partners, were more likely to engage in risky sexual behaviours. Male age-bridgers may be key players in the transmission of sexually transmitted infections among youth linking age-disparate sexual networks.

Sexual bridging socially and over time: a simulation model exploring the relative effects of mixing and concurrency on viral sexually transmitted infection transmission

BACKGROUND

Sexual partnerships between people at higher and lower risk for sexually transmitted infections (STIs) (i.e., bridging) occur through dissortative mixing and concurrent partnerships, yet the relative effects of these network patterns on population STI spread are poorly understood.

GOAL

Using a stochastic model, the authors investigated the impact of mixing and concurrency on the spread of a persistent viral STI.

STUDY DESIGN

A total of 1,050 populations were simulated of 1,000 subjects over 400 weeks with varied concurrency levels and mixing patterns. STI prevalence and the average number of secondary transmissions per subject were analyzed with regression.

RESULTS

Mixing had a greater impact on prevalence for all groups, whereas concurrency was significant for only the lowest activity group. Mixing patterns moderated the magnitude of concurrency's impact on secondary transmissions.

CONCLUSIONS

Through connecting subgroups of differential risk, sexual mixing facilitates dissemination of STIs throughout a population. Concurrency expedites transmission by shortening the time between sexual contacts among infected and susceptible persons, particularly during the highly infectious period.

HIV and African Americans in the southern United States: sexual networks and social context

BACKGROUND

Heterosexual HIV transmission among African Americans in the rural southern United States has climbed in recent years. Concurrent partnerships and bridge populations have emerged as key elements in the spread of sexually transmitted infections (STIs).

GOAL

The goal of this study was to examine published empiric data and other literature concerning the extent of these network patterns and their relationship to the socioeconomic context among African Americans in the rural South.

STUDY DESIGN

The authors conducted a review of public health, medical, and social sciences literature.

RESULTS

In areas of the rural South with high STI rates, there is extensive concurrency with evidence of dense sexual networks and bridging among the general population, core group members, and other high-risk subpopulations. Qualitative research reveals socioeconomic factors that support these network patterns: low ratio of men to women, economic oppression, racial discrimination, and high incarceration rates of black men.

CONCLUSION

Concurrency and bridging likely contribute to increased heterosexual HIV transmission among blacks in the South; contextual factors promote these network patterns in this population.

Discord, Discordance, and Concurrency: Comparing Individual and Partnership-Level Analyses of New Partnerships of Young Adults at Risk of Sexually Transmitted Infections

BACKGROUND AND OBJECTIVES

Partnerships that are discordant by demographic and behavioral characteristics or are concurrent may facilitate transmission of sexually transmitted infections (STIs) by bridging sexual networks.

GOAL

: The goal of this study was to examine if STI risk within partnerships is associated with discordance and concurrency using the partnership as the unit of analysis.

STUDY

One hundred ninety-two individuals, in 96 new partnerships, recruited from sexually transmitted disease and family planning clinics, underwent a computer-assisted interview; were tested for chlamydia, gonorrhea, and trichomonas; and their medical records were reviewed. Partnership variables for discordance by ethnicity, education level, number of lifetime partners, and relationship commitment, as well as concurrency and consistent condom use were tested for associations with partnership STI by chi-squared analysis and logistic regression. Associations between individual level STI, individual characteristics, relationship commitment, and concurrency were tested in bivariate and multivariate models.

RESULTS

STI was detected in 22% of partnerships; discordance for demographics or relationship commitment was reported in 40% to 50%; and partner concurrency in 26%. Few partnerships (18%) reported consistent condom use in the prior month. In multivariate analyses, partnership-level STI was associated with discordance by ethnicity (odds ratio [OR], 3.4; P = 0.04), commitment (OR, 4.2; P = 0.02), number of lifetime partners (OR, 4.9; P = 0.01), and concurrency (OR, 3.8; P = 0.03). Individual-level STI was associated with the individual's concurrency and Hispanic ethnicity.

CONCLUSIONS

Discordance and concurrency are associated with STI at the partnership level and may reflect bridging between high- and low-risk STI networks. Partnership factors allowed additional assessment of STI risk over individual factors, suggesting that data on partnerships may identify individuals linked to risky networks.