Sexual partner characteristics and sexually transmitted diseases among adolescents and young adults

Prevalence of sexually transmissible infections in adolescents treated in a family planning outpatient clinic for adolescents in the western Amazon

Sexually transmitted infections (STIs) are among the most common public health problems worldwide, especially among adolescents and young adults, who account for almost 50% of all STI patients. Studies on the subject in the western Amazon are limited. This study aimed to evaluate the prevalence of STIs (chlamydia, gonorrhea, trichomoniasis, herpes simplex virus, syphilis, human immunodeficiency virus [HIV], hepatitis B, and hepatitis C) in adolescents treated at a family planning outpatient clinic in the western Amazon: Porto Velho, Rondônia, Brazil. A total of 196 adolescents were enrolled. During the gynecological examination, endocervical samples were collected to test for four STIs (chlamydia, gonorrhea, trichomoniasis, and herpes simplex virus), and blood samples were collected for the detection of HIV, syphilis, and hepatitis B and C. The mean age was 17.3 ± 1.5 years, the age at sexarche was 14.4 ± 1.6 years, and 54.6% of participants had their first sexual intercourse at 14 years or younger. Only 1.0% of the adolescents used condoms in all sexual relations, and 19.9% had casual partner(s) in the last year. In the evaluation of prevalence, we found that 32% of the adolescents had at least one STI, with the most prevalent being chlamydia (23%), followed by trichomoniasis (5.6%), herpes simplex (4.6%), and gonorrhea (3.1%). No positive cases of hepatitis B, hepatitis C, or HIV were detected, but 1% of the adolescents tested positive for syphilis. These indicators will support more effective health care strategies aimed at improving the quality of life of populations in this region of the western Amazon. In conclusion, our findings demonstrated high rates of STIs in the studied patients, reinforcing the need to expand epidemiological studies to implement more appropriate public policies and intervention strategies to prevent STIs in adolescents and other vulnerable populations in the western Amazon.

The Role of Alcohol-Related Behavioral Risk in the Design of HIV Prevention Interventions in the Era of Antiretrovirals: Alcohol Challenge Studies and Research Agenda

HIV/AIDS remains a significant health threat and alcohol is a robust contributing factor. After 25 years of alcohol challenge studies investigating alcohol-related behavioral risk (ARBR), much has been learned delineating how drinking influences sexual transmission. We examine this research and consider its relevance for interventions in the era of antiretrovirals. We consider prototypic alcohol challenge methods, illustrative findings, and prevention/intervention implications, noting three perspectives: (a) scale up/extend existing interventions, including identifying under-targeted risk groups and intersecting with PrEP/PEP interventions; (b) modify existing interventions by cultivating psychoeducational content related to alcohol expectancies, alcohol myopia, sexual arousal, risk perception, sexual abdication, and condom use resistance; and (c) innovate new interventions through Science of Behavior Change approaches and repurposing ARBR paradigms. Finally, we suggest research directions concluding that until HIV incidence diminishes significantly, psychosocial interventions addressing the nexus of alcohol use, sexual transmission, and adherence to biomedical protocols will be an important priority.

Association between Chlamydia and routine place for healthcare in the United States: NHANES 1999-2016

BACKGROUND

The United States is experiencing a surge in Chlamydia trachomatis (CT) infections representing a critical need to improve sexually transmitted infection (STI) screening and treatment programs. To understand where patients with STIs seek healthcare, we evaluated the relationship between CT infections and the place where individuals report usually receiving healthcare.

METHODS

Our study used a nationally representative sample from the National Health and Nutrition Examination Survey (NHANES) from 1999 to 2016. The study population is adult patients, aged 18 to 39 years in whom a urine CT screen was obtained. Logistic regression models were used to determine if location of usual healthcare was predictive of a positive urine CT screen result. Models were adjusted for known confounders including age, gender, race/ethnicity, education, and insurance status.

RESULTS

In this nationally representative sample (n = 19,275; weighted n = 85.8 million), 1.9% of individuals had a positive urine CT result. Participants reported usually going to the doctor's office (70.3%), "no place" (24.8%), Emergency Department (ED) (3.3%), or "other" place (1.7%) for healthcare. In adjusted models, the predicted probability of having a positive urine CT result is higher (4.9% vs 3.2%, p = 0.022; OR = 1.58) among those that reported the ED as their usual place for healthcare compared to those that reported going to a doctor's office or clinic.

CONCLUSIONS

Individuals having a positive urine CT screen are associated with using the ED as a usual source for healthcare. Understanding this association has the potential to improve STI clinical and policy interventions as the ED may be a critical site in combatting the record high rates of STIs.

Marijuana Use, Sexual Behaviors, and Prevalent Sexually Transmitted Infections Among Sexually Experienced Males and Females in the United States: Findings From the National Health and Nutrition Examination Surveys

BACKGROUND

Several national guidelines consider illicit drug use as an indication for testing and/or counseling for some sexually transmitted infections (STIs). The legal and social landscape of marijuana use is changing, and its relevance with STI risk is unclear.

METHODS

Sex-specific prevalence of T. vaginalis and/or C. trachomatis infection was examined by past-year marijuana use (no vs yes) among 2958 sexually experienced, 20- to 39-year-old participants of the 2013-2016 National Health and Nutrition Examination Surveys. Prevalence ratios (PRs) with 95% confidence intervals [CIs] were estimated by Poisson regression. Adjusted PRs (aPR) were estimated following propensity score covariate-adjustment accounting for sociodemographics, alcohol use, injection drug use, depression, and age at sexual debut.

RESULTS

Past-year marijuana use was reported by 27.3% and 36.3% of females and males, respectively. Male and female past-year marijuana users were more likely to have new and multiple sexual partners in the past year (P < 0.05). Past-year marijuana use was associated with prevalent C. trachomatis and/or T. vaginalis infection among females (7.4% vs. 2.9%; PR, 2.57 [95% CI, 1.62-4.07]) and males (4.0% vs. 1.1%; PR, 3.59 [95% CI, 1.96-6.58]), but this association was attenuated after propensity score covariate adjustment among females (aPR, 1.15 [95% CI, 0.72-1.83]) and males (aPR, 2.10 [95% CI, 0.88-5.02]). Additional adjustment for new or multiple sexual partners further attenuated the associations (aPRs, 1.02 [95% CI, 0.65-1.51] and 1.91 [95% CI, 0.82-4.47] for females and males, respectively).

CONCLUSIONS

Sexually transmitted infection prevalence was higher among persons with a past-year history of marijuana use; however, this association was not significant after accounting for measured confounders. Additional work is needed to characterize STI prevalence by the mode, duration, and frequency of marijuana use.

Longitudinal predictors of male sexual partner risk among Black and Latina women in their late thirties: ethnic/racial identity commitment as a protective factor

This study aimed to investigate predictors of male sexual partner risk among Latinas and Black women in their late thirties. We used multiple regression analysis to examine factors associated with male sexual partner risk among 296 women who participated in two waves of the Harlem Longitudinal Development Study (New York, 2011-2013 and 2014-2016). Women who experienced childhood sexual abuse had higher risk partners than those who did not [b = 0.16, 95% confidence interval (CI) = 0.06, 0.28]. Earlier marijuana use was a risk factor for partner risk in the late thirties (b = 0.12, 95% CI = 0.04, 0.27). Higher levels of ethnic/racial identity commitment mitigated this risk (b = - 0.15, 95% CI = - 0.26, - 0.04). Ethnic/racial identity commitment can be protective against male sexual partner risk among Latina and Black women who use marijuana. Further research should explore the protective role of different dimensions of ethnic/racial identity against sexually transmitted infections, including HIV.

The “dating game”: age differences at first sex of college students in Italy

Researchers have devoted much attention both to the analysis of the first sexual experience and to how the couple was established, but little is still known about age differences of partners at their first sexual relationship. The availability of two highly comparable waves of a survey on the sexual behavior of college students in Italy (SELFY—Sexual and Emotional LiFe of Youth) carried out in 2000 and 2017 allowed us to study the predictors of age differences between partners at first sex, filling the existing gap on recent research. Results of multivariate analyses show important gender differences on mate selection: women tend to choose an older partner for having their first sexual experience and are less likely as men to be involved in age discordant first sex relationships with a younger partner. Age gaps between partners also influence age at sexual debut, which tends to occur earlier in a relationship with an older partner and later if having first sex with a younger partner. Another important predictor of the age gap is the type of relationship that linked the respondent to its partner at first sex. Our estimations indicate a lower likelihood of having had an older first sex partner for students who had their first sexual experience with the own boy/girl-friend or with a friend compared to those who have had it with a stranger. Finally, we have found a higher likelihood of first sex relationships among same-age partners relative to older partners through SELFY waves and small changes on variables influencing such relationships.

Predicting the impact of sexual behavior change on adolescent STI in the US and New York State: a case study of the teen-SPARC tool

PURPOSE

Adolescents aged 13-18 years bear a large burden of sexually transmitted infections (STIs) and changing adolescent sexual risk behavior is a key component of reducing this burden. We demonstrate a novel publicly available modeling tool (teen-SPARC) to help state and local health departments predict the impact of behavioral change on gonorrhea, chlamydia, and HIV burden among adolescents.

METHODS

Teen-SPARC is built in Excel for familiarity and ease and parameterized using data from CDC's Youth Risk Behavior Surveillance System. We present teen-SPARC's methods, including derivation of national parameters and instructions to obtain local parameters. We model multiple scenarios of increasing condom use and estimate the impact on gonorrhea, chlamydia, and HIV incidence, comparing national and New York State (NYS) results.

RESULTS

A 1% annual increase in condom use (consistent with Healthy People 2020 goals) could prevent nearly 10,000 cases of STIs nationwide. Increases in condom use of 17.1%, 2.2%, and 25.5% in NYS would be necessary to avert 1000 cases of gonorrhea, 1000 cases of chlamydia, and 10 cases of HIV infection, respectively. Additional results disaggregate outcomes by age, sex, partner sex, jurisdiction, and pathogen.

CONCLUSION

Teen-SPARC may be able to assist health departments aiming to tailor behavioral interventions for STI prevention among adolescents.

Elevated Risky Sexual Behaviors Among Sexual Minority Girls: Indirect Risk Pathways Through Peer Victimization and Heavy Drinking

Sexual minority girls (SMGs), compared with heterosexual females, are more likely to report negative sexual outcomes including earlier age of sexual intercourse debut, more lifetime and recent sexual partners, pregnancy involvement, and sex while intoxicated. Data describing the mechanisms related to these health disparities are limited. The purpose of this study was therefore to longitudinally assess the roles of sexual minority-related peer victimization and heavy episodic drinking (HED) as mediators of the relation between sexual minority status and sexual outcomes. The girls examined in this study were recruited into a longitudinal study of adolescent health from two large, urban adolescent medicine clinics affiliated with academic medical centers. The final sample for this analysis included 79 SMGs and a comparison group of 127 heterosexual girls aged between 14 and 19 years. Mediation models were run in the structural equation modeling framework. Our results provided evidence to support a serial multiple mediation pathway. SMGs were more likely to report sexual minority-related victimization, and sexual minority-related victimization predicted increased HED, which was subsequently found to prospectively predict increased sexual risk behaviors. Taken together, these novel findings indicate that both sexual minority-related victimization and HED may play important roles in explaining disparities in risky sexual behavior among SMGs.

Risk factors predictive of sexually transmitted infection diagnosis in young compared to older patients attending sexually transmitted diseases clinics

Young people aged less than 25 years bear the highest burden of sexually transmitted infections (STIs) in the United States. Here we sought to characterize patients aged 15–24 compared with patients ≥age 25 utilizing a database of first visits to two STI clinics in Baltimore, USA from 2011 to 2016. Acute STI (aSTI) was defined as gonorrhea (GC), trichomonas, or early syphilis (ES) in women and non-gonococcal urethritis, GC, Chlamydia (CT), and ES in men. Proportions were compared using the Chi square test and logistic regression was used to assess aSTI predictors in younger versus older groups, stratified by gender. Fifteen thousand four hundred and sixty-three first visits for patients <25 and 25,203 for patients ≥25 were analyzed. Participants <25 were more likely to be Black and less likely to self-identify as straight than those ≥25. While younger patients had more partners, they were less likely to report risk behaviors such as ‘Never’ using condoms, cocaine use, and sex with alcohol than older patients. Predictors of aSTI risk differed both by age and gender. STI prevention messages should be tailored, and access to screening should be optimized for young men and women, in order to address rising STI rates in this population.

Nonmedical use of prescription drugs during sexual activity as a predictor of condom use among a sample of college students

Objective: To examine the impact of nonmedical use of prescription drugs (NMUPD) during sexual activity on the frequency of condom use among a sample of college students. Participants: Students attending a large Midwestern University (N = 4284) during April 2015. Methods: Retrospective cross-sectional analysis of survey data using logistic regression. Results: Respondents and/or their sexual partners who engaged in NMUPD during sexual activity were significantly less likely to use condoms during 75% or more of past 12-month sexual encounters compared to respondents who had not engaged in lifetime and past 12-month NMUPD. Although not statistically significant, trends suggest that respondents who engaged in NMUPD during sexual activity may be less likely to use condoms than those who engaged in lifetime or past 12-month NMUPD but not during sexual activity. Conclusions: Findings suggest a need for specific strategies for reducing risk behaviors related to prescription drugs and sexual activity.

Prevalence and factors associated with gonorrhea infection with respect to anatomic distributions among men who have sex with men

INTRODUCTION

Gonorrhea (GC) infection caused by Neisseria gonorrhoeae has been steadily increasing in Thailand over the last decade. Men who have sex with men (MSM) are at high risk for gonorrhea infection.

MATERIALS AND METHODS

In this study, we determined the prevalence of and risk factors associated with gonococcal infections by three anatomical sites among MSM. We have conducted a cross-sectional analysis of a sexually transmitted disease (STD), gonorrhea among MSM attending two STD clinics in Khon Kaen, Thailand. We included 358 MSM over 18 years of age. Data were collected using self-administered questionnaire. In each participant, an oropharyngeal, anorectal, and endourethral swab were tested with culture and nucleic acid amplification test (NAAT). However, 267 urine samples were tested by both methods. Factors associated with gonorrhea infections were assessed using univariate and multivariate logistic regression.

RESULTS

One hundred and ninety-five out of 358 (54.47%) MSM tested were found to be positive for gonorrhea using a porA gene targeted NAAT by Real-time PCR with TaqMan probes, but there was no positive result by culture. The gonorrheal prevalence for male genital site, anal, and oropharyngeal, were 34.73% (95%CI 33.07, 45.08), 29.01% (95%CI 24.61, 34.33), and 27.93% (95%CI 23.35, 32.89), respectively, while 5.9% (21/355) were positive for gonococcal infection in all anatomic sites (oropharynx + anus + urethra) of one participant. Previous history of diagnosed STDs was a significant factor associated urethral gonorrhea (odds ratio = 3.52, 95%CI 1.87-6.66, P Value< 0.001). In addition, having more than one partner was increased urethral gonorrhea (adjusted odds ratio = 2.26, 95%CI 1.10-4.68, P Value = 0.026). 100% of condom use was found decreasing urethral infection (adjusted odds ratio = 0.39, 95%CI 0.15-0.99, P Value = 0.046).

CONCLUSIONS

The most common anatomic site of gonorrhea infection was male genital site, and the independent risk factors were having history of diagnosed STDs and having more than one partner in the past 3 months, but 100% condom use was a protective factor of this infection.

Increasing adolescent girls' ability to identify STI-risk characteristics of sexual partners: a pilot study within an alternative disciplinary school

OBJECTIVES

We evaluated the feasibility of conducting a 9-week long sexually transmitted infection (STI) prevention intervention, Angels in Action, within an alternative disciplinary school for adolescent girls.

METHODS

All girls who were 16-18 years old, enrolled in the school and did not have plans to transfer from the school were eligible to participate. We measured process feasibility with recruitment, retention and participant enjoyment. Using a pretest-post-test design with a double post-test, we used χ² tests to estimate the intervention effect on participants' sexual partner risk knowledge, intentions to reduce partner risk and sexual activities in the past 60 days with three behavioural surveys: prior to, immediately following and 3 months after the intervention.

RESULTS

Among the 20 girls who were eligible, 95% (19/20) of parents consented and all girls (19/19) agreed to participate. Survey participation was 100% (19/19) prior to, 76% (13/17) immediately following and 53% (9/17) 3 months after the intervention. The intervention was administered twice and a total 17 girls participated. Session attendance was high (89%) and most participants (80%) reported enjoying the intervention. The intervention increased the percentage of girls who could identify partner characteristics associated with increased STI risk: 38% before, 92% immediately following and 100% 3 months after the intervention (p=0.01). Girls also increased their intentions to find out four of the most highly associated partner characteristics (partner's age, recent sexual activity and STI or jail history): 32% before to 75% immediately following (p=0.02) and 67% 3 months after the intervention (p=0.09).

CONCLUSIONS

This pilot study suggests girls at alternative disciplinary schools participated in and enjoyed a 9-week STI preventive intervention. Within alternative disciplinary schools, it is potentially feasible to increase girls' consideration of partner risk characteristics as a means to enhance their STI prevention skills.

Increased Partner Risk Characteristic Among Adolescents Using Alcohol In the Moment

BACKGROUND

Alcohol is a recognized risk factor for sexually transmitted diseases acquisition, but the mechanism is unclear. Potentially, adolescents using alcohol in the 2 hours before sex (in-the-moment use) have riskier sexual partners.

METHODS

We used multivariable logistic regression to examine the association between in-the-moment alcohol use and partner risk characteristics reported for the most recent sex among primarily 17- to 18-year-old adolescents originally recruited from a representative sample of Chicago public elementary schools. We created 3 composite partner risk profiles: partner familiarity risk (casual and unexpected), partner context risk (age discordance and met in public), and overall risk using all measures except partner alcohol use.

RESULTS

Teens who reported any in-the-moment alcohol use were more likely than nondrinking teens to report casual (adjusted odds ratio [AOR], 3.2; 95% confidence interval [95% CI], 2.1-4.9), unexpected (AOR, 1.6; 95% CI, 1.0-2.5), age discordant (AOR, 3.0; 95% CI, 2.0-4.6), or met in public partners (AOR, 1.4; 95% CI, 1.0 to 2.1). For each composite measure, the number of partner risk characteristics reported increased linearly with the percent of teens drinking in the moment (Cochran-Armitage trend, P < 0.0001). Compared with zero characteristics, in-the-moment alcohol use was associated with increased odds of reporting 1 (AOR, 2.8; 95% CI, 1.7-4.5), 2 (AOR, 4.6; 95% CI, 2.7, 7.6), or 3 to 4 characteristics (AOR, 7.1; 95% CI, 3.3-15.3).

CONCLUSIONS

Our findings expand the link between in-the-moment alcohol use and partner risk reported in prior studies to encompass adolescents' general sexual experiences and additional partner characteristics including the highly associated composite characteristics.

Associations of Partner Age Gap at Sexual Debut with Teenage Parenthood and Lifetime Number of Partners

CONTEXT

Age at sexual debut and age gap between partners at debut are modifiable characteristics that may be related to risky sexual behaviors. Understanding any such relationships is a necessary first step toward strengthening risk interventions.

METHODS

Age at sexual debut and partner age gap were examined for 3,154 female and 2,713 male respondents to the 2011-2013 National Survey of Family Growth who first had intercourse before age 18. Multivariable logistic regression was used to assess associations between these measures and teenage parenthood and reporting a high lifetime number of partners (i.e., a number above the sample median).

RESULTS

Females' odds of teenage parenthood were elevated if sexual debut occurred at ages 15-17 and involved a partner age gap of 3-4 years (odds ratio, 1.8) or more (2.0); they were reduced if debut occurred before age 15 and the gap was 3-4 years (0.8). Females' likelihood of reporting a high lifetime number of partners was negatively associated with age gap (0.4-0.7, depending on age at debut and length of age gap). Males' likelihood of reporting a large number of partners was positively associated with age gap if sexual debut was before age 15 and the gap was five or more years (1.7) or if debut was at ages 15-17 and involved a 3-4-year gap (2.0).

CONCLUSION

Identifying the mechanisms underlying these associations could inform program design and implementation.

African American women and sexually transmitted infections: The contextual influence of unbalanced sex ratios and individual risk behaviors

This study uses data from 564 African American women to examine the correlates of lifetime prevalence of a sexually transmitted infection (STI). Specifically, we test the effects of perceptions about the availability of African American males, five partner characteristics, and drug history. At the bivariate-level, women with an STI diagnosis were significantly more likely to have dated a man who was married, older, had sex with another man, involved in concurrent partnerships, and had been incarcerated. About half of the participants stated it was difficult to find an eligible African American male and attributed the limited pool of same-race partners to drug trafficking, a lack of monogamy, and high rates of incarceration. Multivariate analyses revealed having dated a man who had concurrent sexual partnerships or had been incarcerated, as well as drug use during sex were positively associated with ever having an STI. Individual and contextual implications are addressed.

Efficacy of the READY-Girls Program on General Risk-Taking Behaviors, Condom Use, and Sexually Transmitted Infections Among Young Adolescent Females With Type 1 Diabetes

PURPOSE

The purpose of this study is to examine the short-term efficacy (3 months) of early diabetes-specific READY-Girls preconception counseling (RGPC) on more general risk-taking behaviors, condom use, and sexually transmitted infections (STIs) among adolescent females with type 1 diabetes.

METHODS

Secondary analysis was performed with data pooled from 2 independent randomized controlled trials to evaluate the short-term impact of RGPC. The pooled sample had 136 participants (mean age, 16.9 years; range, 13-19 years) and compared those who received the RGPC (n = 76) with a control group who received standard care (n = 60). Both groups self-reported on demographic characteristics, risk-taking behaviors (eg, substance use and unsafe sex), birth control, and STIs.

RESULTS

No effect of RGPC emerged on risk-taking behaviors, condom use, and STIs. Only 25% (n = 36) of the adolescents were sexually active at baseline, and 29% (n = 39) were sexually active at 3 months. Their overall mean age of sexual debut was 15.4 years, with more than half reporting an episode of unprotected sex. Condoms were the most frequent type of birth control used by both groups at both time points. By 3 months, only 4 participants had been diagnosed with an STI. Over time, subjects in both groups became more sexually active and used more condoms.

CONCLUSION

RGPC did not appear to directly affect general risk-taking behaviors or STIs, since it focuses on diabetes and reproductive health issues. Condom use did increase over time in both groups. More information on risk-taking behaviors and STIs should be included in diabetes-specific preconception counseling programs, including RGPC.

Lifetime marijuana use and sexually transmitted infection history in a sample of Black college students

BACKGROUND

Sexually transmitted infections (STIs) and marijuana use are more prevalent in African Americans/Blacks (Blacks) than any other ethnicity in the United States. Given the significant health care costs and deleterious health correlates of using marijuana or contracting a STI, it is imperative to examine their association, especially in the vulnerable and underrepresented group of young adult Blacks.

PURPOSE

The current study examines the association between lifetime marijuana use on history of STI diagnosis in a sample of Black college students.

RESULTS

Approximately 81% of the 213 participants were female, with approximately 81% also being 21years of age or younger. Alcohol (88%) led the prevalence of substances ever used, followed by marijuana (75%), and cigarettes (57%). When including demographic and substance use covariates, lifetime marijuana use (AOR=2.51; 95% CIs, 1.01, 6.21) and age (AOR=2.72; 95% CIs, 1.32, 5.64) were associated with history of STI.

CONCLUSION

These findings will inform intervention and prevention methods used to reduce STI prevalence and marijuana use among Black young adults. Both epidemiological and biological foundations will be discussed.

Maryland Alcohol Sales Tax and Sexually Transmitted Infections: A Natural Experiment

INTRODUCTION

Sexually transmitted infections are common causes of morbidity and mortality, including infertility and certain types of cancer. Alcohol tax increases may decrease sexually transmitted infection rates overall and differentially across population subgroups by decreasing alcohol consumption in general and prior to sex, thus decreasing sexual risk taking and sexually transmitted infection acquisition. This study investigated the effects of a Maryland increase in alcohol beverage sales tax on statewide gonorrhea and chlamydia rates overall and within age, gender, and race/ethnicity subpopulations.

METHODS

This study used an interrupted time series design, including multiple cross-state comparisons, to examine the effects of the 2011 alcohol tax increase in Maryland on chlamydia and gonorrhea cases reported to the U.S. National Notifiable Disease Surveillance System for January 2003 to December 2012 (N=120 repeated monthly observations, analyzed in 2015). Effects were assessed with Box-Jenkins autoregressive moving average models with structural parameters.

RESULTS

After the alcohol-specific sales tax increase, gonorrhea rates decreased 24% (95% CI=11%, 37%), resulting in 1,600 fewer statewide gonorrhea cases annually. Cohen's d indicated a substantial effect of the tax increase on gonorrhea rates (range across control group models, -1.25 to -1.42). The study did not find evidence of an effect on chlamydia or differential effects across age, race/ethnicity, or gender subgroups.

CONCLUSIONS

Results strengthen the evidence from prior studies of alcohol taxes influencing gonorrhea rates and extend health prevention effects from alcohol excise to sales taxes. Alcohol tax increases may be an efficient strategy for reducing sexually transmitted infections.

Disparities by Sexual Orientation in Frequent Engagement in Cancer-Related Risk Behaviors: A 12-Year Follow-Up

OBJECTIVES

We examined sexual-orientation disparities in frequent engagement in cancer-related risk indicators of tobacco, alcohol, diet and physical activity, ultraviolet radiation, and sexually transmitted infections (STIs).

METHODS

We used longitudinal data from the national Growing Up Today Study (1999-2010). Of the analytic sample (n = 9958), 1.8% were lesbian or gay (LG), 1.6% bisexual (BI), 12.1% mostly heterosexual (MH), and 84.5% completely heterosexual (CH).

RESULTS

More sexual minorities (LGs, BIs, and MHs) than CHs frequently engaged in multiple cancer-related risk behaviors (33%, 29%, 28%, and 19%, respectively). Sexual-minority young women, especially BI and MH, more frequently engaged over time in substance use and diet and physical activity risk than CH women. More young gay than CH men frequently engaged over time in vomiting for weight control (odds ratio [OR] = 3.2; 95% confidence interval [CI] = 1.1, 9.4), being physically inactive (OR = 1.7; 95% CI = 1.2, 2.4), and using tanning booths (OR = 4.7; 95% CI = 3.0, 7.4), and had a higher prevalence of ever having an STI (OR = 3.5; 95% CI = 2.0, 6.4). Individual analyses were generally comparable to the group-level analyses.

CONCLUSIONS

Young sexual minorities are at risk for cancer through frequent exposure to cancer-related risk behaviors over time. Long-term, longitudinal studies and surveillance data are essential and warranted to track frequent engagement in the risk behaviors and cancer-related morbidity and mortality.

It is complicated: sexual partner characteristic profiles and sexually transmitted infection rates within a predominantly African American population in Mississippi

BACKGROUND

Mississippi has among the highest prevalence of sexually transmitted infections (STIs) in the United States. Understanding sexual networks can provide insight into risk factors for transmission and guide prevention interventions.

METHODS

Participants included 1437 primarily African American (95%) adults presenting for care at an STI clinic in Jackson, Mississippi. Latent class analysis identified underlying population subgroups with unique patterns of response on a comprehensive set of 14 sexual partner variables, such as living with or having a child with a partner, partner dependence and trust, 1-time sexual encounters, multiple main partners, substance use, sexual concurrency, and incarceration. Classes were compared on participant age, sex, sexual orientation, public assistance, lifetime partners, relationship status, and self-reported past-year STI.

RESULTS

Three classes emerged. Class 1 (n = 746) participants were less dependent on partners and less likely to live with or have a child with a partner. Class 2 participants (n = 427) endorsed multiple STI risk factors, including partner incarceration, 6 or more lifetime partners, sexual concurrency, 1-time sexual encounters, and substance use at last sex. Class 3 participants (n = 226) were more likely to be in dependent, committed relationships with children. Class 2 had a higher proportion of self-report past-year STIs (36.7%) compared with classes 1 (26.6%) and 3 (26.1%).

CONCLUSIONS

Certain partner factors such as incarceration, substance use, and concurrency may contribute to increased STI risk. Partner factors may be useful proxies for STI risks and could be useful questions to include in screening questionnaires in clinical settings.

"Condoms are the standard, right?": Exploratory study of the reasons for using condoms by Black American emerging adult women

Condoms are considered a highly effective form of sexually transmitted infection prevention for heterosexual sex. Black American women (BAW) have been and are at elevated risk for heterosexual exposure to human immunodeficiency virus (HIV) because they have been and continue to be less likely to negotiate condom use with a partner that supports them financially. However, BAW who have made tremendous educational gains may still encounter challenges regarding the distribution of power that can affect condom use and negotiation. The purpose of this exploratory study was to examine the reasons that highly educated, emerging, adult BAW reported for using condoms. One hundred twenty-seven emerging adult BAW (ages 18-29 years) completed a mixed-methods online survey during the spring of 2013 (January-May). Approximately 80% of the women were in college or college graduates. They had a high rate of previous HIV testing (68.5%). Through the use of an interpretive paradigm and grounded theory, three themes emerged regarding the reasons that the participants in this sample used condoms as their primary form of protection: (1) the reliable "standard," (2) pregnancy prevention, and (3) cost effective and "easily accessible." Findings are discussed in terms of their public health significance for this seemingly lower-risk population.

Methods for Collection of Participant-aided Sociograms for the Study of Social, Sexual and Substance-using Networks Among Young Men Who Have Sex with Men

In this study, we adapted and tested a participant-aided sociogram approach for the study of the social, sexual, and substance use networks of young men who have sex with men (YMSM); a population of increasing and disproportionate risk of HIV infection. We used a combination of two interviewer-administered procedures: completion of a pre-numbered list form to enumerate alters and to capture alter attributes; and a participant-aided sociogram to capture respondent report of interactions between alters on an erasable whiteboard. We followed the collection of alter interactions via the sociogram with a traditional matrix-based tie elicitation approach for a sub-sample of respondents for comparison purposes. Digital photographs of each network drawn on the whiteboard serve as the raw data for entry into a database in which group interactions are stored. Visual feedback of the network was created at the point of data entry, using NetDraw network visualization software for comparison to the network structure elicited via the sociogram. In a sample of 175 YMSM, we found this approach to be feasible and reliable, with high rates of participation among those eligible for the study and substantial agreement between the participant-aided sociogram in comparison to a traditional matrix-based approach. We believe that key strengths of this approach are the engagement and maintenance of participant attention and reduction of participant burden for alter tie elicitation. A key weakness is the challenge of entry of interview-based list form and sociogram data into the database. Our experience suggests that this approach to data collection is feasible and particularly appropriate for an adolescent and young adult population. This builds on and advances visualization-based approaches to social network data collection.

Behavioral Decision Research Intervention Reduces Risky Sexual Behavior

Although adolescents are at disproportionate risk for sexually transmitted infections, most sex education programs have shown little effect on sexual behavior. An interactive video intervention developed by our team has been identified as one of a few programs that have been documented to reduce sexually transmitted infections in this population. Building on behavioral decision research, we used a mental models approach to interview young women about their sexual decisions, finding, among other things, the strong role of perceived social norms. We based our intervention on these results, aiming to help young women identify and implement personally and socially acceptable decision strategies. A randomized controlled trial found that the video reduced risky sexual behavior and the acquisition of chlamydia infection. We recently revised the video to suit more diverse audiences, and upgraded it to modern standards of cinematography and interactivity. It is now in field trial.

Mediation by peer violence victimization of sexual orientation disparities in cancer-related tobacco, alcohol, and sexual risk behaviors: pooled youth risk behavior surveys

OBJECTIVES

We examined the role of adolescent peer violence victimization (PVV) in sexual orientation disparities in cancer-related tobacco, alcohol, and sexual risk behaviors.

METHODS

We pooled data from the 2005 and 2007 Youth Risk Behavior Surveys. We classified youths with any same-sex sexual attraction, partners, or identity as sexual minority and the remainder as heterosexual. We had 4 indicators of tobacco and alcohol use and 4 of sexual risk and 2 PVV factors: victimization at school and carrying weapons. We stratified associations by gender and race/ethnicity.

RESULTS

PVV was related to disparities in cancer-related risk behaviors of substance use and sexual risk, with odds ratios (ORs) of 1.3 (95% confidence interval [CI] = 1.03, 1.6) to 11.3 (95% CI = 6.2, 20.8), and to being a sexual minority, with ORs of 1.4 (95% CI = 1.1, 1.9) to 5.6 (95% CI = 3.5, 8.9). PVV mediated sexual orientation disparities in substance use and sexual risk behaviors. Findings were pronounced for adolescent girls and Asian/Pacific Islanders.

CONCLUSIONS

Interventions are needed to reduce PVV in schools as a way to reduce sexual orientation disparities in cancer risk across the life span.

Sexual orientation disparities in cancer-related risk behaviors of tobacco, alcohol, sexual behaviors, and diet and physical activity: pooled Youth Risk Behavior Surveys

OBJECTIVES

We examined sexual orientation disparities in cancer-related risk behaviors among adolescents.

METHODS

We pooled data from the 2005 and 2007 Youth Risk Behavior Surveys. We classified youths with any same-sex orientation as sexual minority and the remainder as heterosexual. We compared the groups on risk behaviors and stratified by gender, age (< 15 years and > 14 years), and race/ethnicity.

RESULTS

Sexual minorities (7.6% of the sample) reported more risk behaviors than heterosexuals for all 12 behaviors (mean = 5.3 vs 3.8; P < .001) and for each risk behavior: odds ratios (ORs) ranged from 1.3 (95% confidence interval [CI] = 1.2, 1.4) to 4.0 (95% CI = 3.6, 4.7), except for a diet low in fruit and vegetables (OR = 0.7; 95% CI = 0.5, 0.8). We found sexual orientation disparities in analyses by gender, followed by age, and then race/ethnicity; they persisted in analyses by gender, age, and race/ethnicity, although findings were nuanced.

CONCLUSIONS

Data on cancer risk, morbidity, and mortality by sexual orientation are needed to track the potential but unknown burden of cancer among sexual minorities.

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.

It takes 2: partner attributes associated with sexually transmitted infections among adolescents

OBJECTIVES

The aims of this study were to identify partner attributes associated with sexually transmitted infections (STIs) among adolescents and to summarize implications for research and prevention.

DESIGN

The design of this study was systematic review.

METHODS

We identified peer-reviewed studies published in 1990 through 2010 that assessed 1 or more partner attributes in relation to a biologically confirmed STI among adolescents (15-24 years) by searching MEDLINE and included articles. Studies that included adolescents but more than 50% of the sample or with mean or median age of 25 years or greater were excluded.

RESULTS

Sixty-four studies met the eligibility criteria; 61% were conducted in high-income countries; 80% were cross sectional; and 91% enrolled females and 42% enrolled males. There was no standard "partner" definition. Partner attributes assessed most frequently included the following: age, race/ethnicity, multiple sex partners, and STI symptoms. Older partners were associated with prevalent STIs but largely unrelated to incidence. Black race was associated with STIs but not uniformly. Partners with multiple partners and STI symptoms seem to be associated with STIs predominantly among females. Although significant associations were reported, weaker evidence exists for the following: other partner sociodemographics, sexual and other behaviors (sexual concurrency, intimate partner violence, substance use, travel), and STI history. There were no apparent differences by STI.

CONCLUSIONS

Partner attributes are independently associated with STIs among male and female adolescents worldwide. These findings reinforce the importance of assessing partner attributes when determining STI risk. Prevention efforts should continue to promote and address barriers to condom use. Increased efforts are needed to screen and treat STIs and reduce risky behavior among men. A standard partner definition would facilitate the interpretation of findings in future studies.

Demographic, psychosocial, and contextual factors associated with sexual risk behaviors among young sexual minority women

Young sexual minority women are at risk for negative sexual health outcomes, including sexually transmitted infections and unintended pregnancies, yet little is known about these risks. We examined factors that may influence sexual risk from a psychosocial and contextual perspective. Analyses were conducted to examine within group relationships between sexual behaviors, negative outcomes, and related factors in a sample of young sexual minority women. Participants (N = 131) were young (mean = 19.8) and diverse in terms of race/ethnicity (57% non-White). Sex under the influence, having multiple partners, and having unprotected sex were common behaviors, and pregnancy (20%) and sexually transmitted infection (12%) were common outcomes. Risk behaviors were associated with age, alcohol abuse, and older partners. Results support the need for further research to understand how these factors contribute to risk in order to target risk reduction programs for this population.

Association between sex partner meeting venues and sexual risk taking among urban adolescents

PURPOSE

To increase understanding of the association between sexual partner meeting venue types (school, through friends or family, organized groups, public places, or on the street) and sexual risk taking among urban youths.

METHODS

Data were from 17- to 18-year-old youths who reported having had sex (n = 1,656) by the time they participated in the 2008-2009 follow-up of a multicomponent alcohol preventive intervention, Project Northland Chicago. We used logistic regression to assess the association between partner meeting venue and sexual risk taking.

RESULTS

Approximately 20% of Chicago adolescents met their most recent sex partner on the street or in public places. Adolescents who met their partner in a public place, rather than in school, were more likely to report having ≥ 3 years age-discordant partner (women: odds ratio [OR] = 7.7, 95% confidence interval [CI] = 3.3-17.7; men: OR = 2.7, 95% CI = 1.1-6.6], alcohol use before sex (women: OR = 3.4, 95% CI = 1.8-6.5; men: OR = 2.4, 95% CI = 1.3-4.4), casual partner (women: OR = not significant; men: OR = 2.4, 95% CI = 1.3-4.5), anal sex (women: OR = not significant; men: OR = 2.4, 95% CI = 1.2-4.9), and unprotected sex (women: OR = 1.7, 95% CI = 1.0-2.7; men: OR = 1.9, 95% CI = 1.1-3.4). Meeting partners on the street was associated with increased probability of alcohol use before sex (women: OR = 2.2, 95% CI = 1.1-4.3; men: OR = 2.1, 95% CI = 1.0-4.6), age-discordant partnerships among women (OR = 14.2, 95% CI = 6.4-31.4), and casual sex partners among men (OR = 2.5, 95% CI = 1.4-4.8).

CONCLUSIONS

Targeting sexual risk taking with partners selected from public places or the street may improve adolescent HIV preventive interventions.

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.

Riskier sexual partners contribute to the increased rate of sexually transmitted diseases among youth with substance use disorders

BACKGROUND

Youth with alcohol or marijuana dependence or disorders (substance use disorders [SUDs]) are at increased risk of acquiring sexually transmitted diseases (STDs). Sexual partner characteristics may explain the relationship between SUD and STD.

METHODS

Clinical criteria for SUD, clinical STD diagnosis, and sexual partner characteristics were assessed among 15- to 24-year-old STD clinic attendees between 1999 and 2002 (n = 412). We used exact logistic regression and path analysis to examine the mediation effect of sexual partner characteristics (age discordance, incarceration, STD diagnosis, other partners, perceived alcohol problem, perceived marijuana problem, and a calculated composite measure) on the relationship between SUD and STD, adjusting for important demographics and condom use.

RESULTS

We found evidence of mediation by partner characteristics on the relationship between SUD and STD. For the logistic regression analysis, adding the partner characteristic composite reduced the strength of the association between SUD and STD from a statistically significant odds ratio of 1.7 (95% confidence interval = 1.0-2.7) to a statistically nonsignificant odds ratio of 1.5 (95% confidence interval = 0.9-2.5). In the path analysis, adding the partner characteristic composite reduced the significant direct effect of SUD on STD (β = 0.5, P = 0.04) to statistically nonsignificant effect (β = 0.1, P = 0.2). We estimated that 31% of the total effect of SUD on STD was attributable to the indirect path through the composite partner characteristic measure.

CONCLUSIONS

Even when controlling for demographics and condom use, partner characteristics partially explained the association between SUD and STD.

A behavioral decision model testing the association of marijuana use and sexual risk in young adult women

We created a model conceptualizing sexual risk as a series of discrete event-specific behavioral decisions and tested the hypothesis that marijuana use was associated with increased sexual risk-taking. Three hundred eight marijuana-using women aged 18-24 completed a 90-day time-line-follow-back to assess sexual behaviors and marijuana use. A sequential logit model estimated the effect of marijuana use on the likelihood of being sexually active, partner type when sexually active, and condom nonuse conditional on partner type. Participants had a mean age of 20.4 years, with 67% Caucasian. Marijuana use was associated with an increased likelihood of being sexually active (OR 1.6; 95% CI 1.33, 1.93) and with condom nonuse when sexually active with casual partners (OR 2.58; 95% CI 1.1, 6.09). This behavioral decision model identified where marijuana use affected sexual risk, and suggests where interventions designed to reduce risk may have an impact.

Immigration and sexual partner risk among Latino adolescents in San Francisco

Sexual partner characteristics increase risk for adverse reproductive health outcomes. Evidence is limited regarding whether choice of sexual partners among Latino adolescents changes with U.S. acculturation/adaptation. We used generalized estimating equations to assess the associations between immigrant generation (recent immigrant, 1.5 [immigrated prior to adolescence], 2nd and 3rd) and sexual partner risk in a prospective cohort study of 411 Latino adolescents aged 14-19. We examined three measures of partner risk and mediating effects of family influence (familism and parental monitoring). The odds of reporting a partner with frequent substance use increased with increasing immigrant generation (odds ratios (OR) [reference = recent immigrants]: 2.3, 3.4, and 5.6) as did having a partner who was in a gang/incarcerated (OR [reference = recent immigrants]: 2.4, 3.6, and 5.7). Though the odds of having high-risk partners decreased with higher parental monitoring, neither family influence measure mediated these relationships. Findings underscore the need for a prevention focus on partner choice with attention to increased risk with increasing U.S. generation.

Risk factors associated with chlamydia and gonorrhoea infection among female sex workers in two Mexico-USA border cities

Female sex workers (FSWs) aged ≥18 years without known HIV infection living in Tijuana and Ciudad Juarez, Mexico who had recent unprotected sex with clients underwent interviews and testing for chlamydia and gonorrhoea using nucleic acid amplification. Correlates of each infection were identified with logistic regression. Among 798 FSWs, prevalence of chlamydia and gonorrhoea was 13.0% and 6.4%, respectively. Factors independently associated with chlamydia were younger age, working in Tijuana versus Ciudad Juarez and recent methamphetamine injection. Factors independently associated with gonorrhoea were working in Tijuana versus Ciudad Juarez, using illegal drugs before or during sex, and having a recent male partner who injects drugs. Chlamydia and gonorrhoea infection were more closely associated with FSWs' drug use behaviours and that of their sexual partners than with sexual behaviours. Prevention should focus on subgroups of FSWs and their partners who use methamphetamine and who inject drugs.

Alcohol and STI risk: evidence from a New Zealand longitudinal birth cohort

BACKGROUND

The present study examined the associations between involvement with alcohol and risks of sexually transmitted infection (STI) during adolescence and early adulthood.

METHODS

A 30-year prospective longitudinal study of the health, development, and adjustment of a birth cohort of 1265 New Zealand-born individuals. Measures included repeated assessments of frequency of alcohol use and number of symptoms of alcohol disorder from ages 15 to 30 and rates of STI from ages 14 to 30. Conditional fixed effects regression models augmented by observed time-dynamic covariate factors were used to control for non-observed confounding in the associations between alcohol and STI risk.

RESULTS

There were clear and consistent trends for increasing involvement with alcohol to be linked with increased risk of STI diagnoses. Adjustment of the associations for sources of non-observed confounding and time-dynamic covariate factors reduced the magnitude of these associations, but they remained statistically significant (p < .05).

CONCLUSIONS

The results of the current study support the notion of the existence of a causal pathway in which increasing levels of alcohol use and symptoms of alcohol abuse/dependence led to increased risks of STI exposure. There was little evidence to suggest that the links between alcohol involvement and STI risk could be fully explained by an underlying predisposing factor that increased the risks of both alcohol involvement and STI.

Heterosexual HIV and sexual partnerships between injection drug users and noninjection drug users

Sex partnerships with injection drug users (IDU) are an understudied network-level risk factor for heterosexual HIV infection. Heterosexuals with no history of injection were recruited from high-risk areas in New York City through respondent-driven sampling. We examined the prevalence of IDU sex partnerships among these non-IDU, the factors associated with having a past year IDU partner, and the independent association of HIV infection and IDU sex partnerships in multiple logistic regression. Of the 601 non-IDU in this analysis, 13.8% had a sex partner in the past year with a history of injection. IDU partnerships were significantly more common among women and those with higher levels of unprotected sex and drug and alcohol use. Overall, 7.0% tested positive for HIV. HIV prevalence was higher (p = 0.07) for participants with IDU partners (9.6%) compared to those with no IDU partners (4.6%). In multiple logistic regression, participants with IDU partners were over twice as likely to be HIV-infected (p = 0.08). Sex partnerships with IDU were common and may play an important role in heterosexual HIV transmission in areas with large IDU populations. Prevention interventions to encourage the disclosure of injection history and risk reduction specifically for those with IDU partners are indicated.