Early adolescent sexual initiation and physical/psychological symptoms: a comparative analysis of five nations

Prevalence of sexual initiation and associated factors in school adolescents in Piauí, Brazil, 2015

OBJECTIVE

to analyze prevalence of sexual initiation and associated factors in adolescents in Piauí.

METHODS

this was a cross-sectional study, with secondary data from the 2015 National Adolescent School-based Health Survey. Hierarchical analysis was performed using robust Poisson regression.

RESULTS

a total of 3.872 adolescents were interviewed. Prevalence of sexual initiation was 24.2%; risk factors for sexual initiation were being male [prevalence ratio (PR) = 2.18; 95% confidence interval (95%CI) 1.90;2.47], being 15 years old or over (PR = 2.49; 95%CI 2.18;2.76), living with mother (PR = 0.68; 95%CI 0.54;0.82), working (PR = 1.82; 95%CI 1.55;2.10), attending a public school (PR = 1.39; 95%CI 1.09;1.75), practicing bullying (PR = 1.50; 95%CI 1.31;1.72), using alcohol (PR = 2.35; 95%CI 2.09;2.64), using cigarettes (PR = 1.46; 95%CI 1.22;1.70) and using illicit drugs (PR = 1.40; 95%CI 1.15;1.66).

CONCLUSION

prevalence of sexual initiation was high and associated with sociodemographic characteristics and vulnerable health behaviors, indicating the need for health promotion strategies.

Sexual Behavior and Health From Adolescence to Adulthood: Illustrative Examples of 25 Years of Research From Add Health

Due to its long-term longitudinal design, the National Longitudinal Study of Adolescent to Adult Health (Add Health) has provided numerous valuable insights into adolescent and young adult sexual behavior. Framed by a conceptual model of sexual behavior and health, I review research using Add Health data to study sexual behavior and health. In this paper, I review research examining both predictors (e.g., neighborhood, family, genetic, individual) and health outcomes (e.g., sexually transmitted infections, mental health) of sexual behavior in adolescents and young adults. Where possible, I focus on long-term longitudinal studies that make use of the unique strengths of the Add Health data. Existing Add Health research has provided considerable information about both the predictors and health consequences of adolescent and young adult sexual behavior. Factors ranging from neighborhoods to genetics predict whether adolescent and young adults engage in sexual behaviors. Findings on long-term outcomes of adolescent sexual behavior suggest that early sexual behavior predicts higher rates of sexually transmitted infections and pregnancy in young adulthood, but not long-term changes to mental health. Unique contributions of Add Health include the ability to examine multidimensional bio-ecological predictors of sexual behavior and to examine long-term effects of sexual behavior and how sexual behaviors and their correlates change across adolescence into adulthood. Future work can leverage these strengths, and in particular the long-term longitudinal nature of the data, to uncover new insights about the developmental course of sexual behavior and health.

Temporal Trends and Differences in Sexuality among Depressed and Non-Depressed Adults in the United States

This study aimed to examine temporal trends and differences in sexuality between depressed and non-depressed adults aged 18-59 in the United States from 2005 to 2016. A total of 21,437 people (5432 with depression) were enrolled in this cross-sectional study. From 2005-2008 to 2013-2016, the average age at first sexual intercourse decreased, while the proportion of normal frequency of sexual activity and heterosexual sexual orientation increased among all the participants. Some differences in sexuality were found between the depressed and non-depressed groups. The average age at first sexual intercourse (p < 0.001), the proportion of normal frequency of sexual activity (p < 0.001), and heterosexual sexual orientation (p < 0.001) were lower in depressed participants, and the differences did not change over time (p_{for trend} = 0.926 of average age at first sexual intercourse, p_{for trend} = 0.823 of normal frequency of sexual activity, p_{for trend} = 0.926 of heterosexual sexual orientation). Moreover, these differences were associated with marital status (p_{for interaction} < 0.001 by average age at first sexual intercourse), employment status (p_{for interaction} < 0.001 by average age at first sexual intercourse), education status (p_{for interaction} = 0.023 by heterosexual sexual orientation) and family income status (p_{for interaction} = 0.013 by average age at first sexual intercourse and p_{for interaction} = 0.017 by normal frequency of sexual activity). In conclusion, the study found that the age at first sexual intercourse decreased and the frequency of sexual intercourse increased in all the participants, and differences in sexuality between depressed and non-depressed participants were present; however, these differences had no further increase or decrease during the 12-year period. These differences were associated with marital status, employment status, education status, and family income status. These findings show differences in sexuality between depressed and non-depressed patients but are somewhat different from previous studies; the results may provide directions for future research and social work.

Longitudinal associations of parent-child communication, dating behaviors, decision-making processes, and sex initiation among United States Latina/o adolescents

Objective

This study examined differences and identified developmental predictors of oral, vaginal, and anal intercourse initiation across generational status among Latina/o adolescents of both genders. More specifically, we compare generational status and gender differences in the longitudinal predictions from parent-child sex communication and dating behaviors to sex initiation 5 years later, and how these associations may be mediated by perceived peer norms, intentions, and attitudes regarding sex among Latina/o adolescents.

Methods

Using prospective longitudinal data from the Healthy Passages™ project collected in Houston and Los Angeles, Latina/o girls (n = 879) and boys (n = 885) who were identified as 1st- (18%), 2nd- (58%), or 3rd (24%)-immigrant generational status reported on their dating behaviors and parent-child communication about sex at 5th grade (M age = 11.12 years), their perceived peer norms and attitudes regarding sex at 7th grade (M age = 13.11 years), and if they had initiated oral, vaginal, or anal sexual intercourse by 10th grade (M age = 16.06 years).

Results

Third-generation Latina girls were more likely than 1st- and 2nd-generation Latinas to have initiated sexual intercourse by 10th grade. More advanced dating behaviors in 5th grade had a positive association with sex initiation for all generational status groups among Latino boys, but only among 1st-generation Latina girls. Moreover, mediating decision-making processes of peer norms and attitudes differed for each group.

Conclusion

Pre-adolescent dating behaviors are associated with long-term differences in adolescents' sexual behaviors, which may point to targets for prevention efforts. Acculturation differences may contribute to different ways in which adolescents decide to engage in sexual intercourse based on the previous dating experiences.

Predictors of Sexual Intimate Partner Violence Perpetration Among Men: A Prospective Analysis

Research demonstrates that both peer socialization and underage drinking play a significant role in teen dating violence. However, less is known about the lasting effects of these risk factors on boys' ability to form healthy romantic relationships as they get older. The present study examined whether boys who perceived their peers would respect them more for having sex and those who engaged in past year heavy alcohol use would be more likely to perpetrate sexual intimate partner violence (IPV) in young adulthood compared to boys who did not endorse perceived peer approval for sex or report past year heavy drinking. Analyses were conducted using a sample of boys (n = 1,189) from Waves I and III of the National Longitudinal Study of Adolescent to Adult Health (Add Health). A logistic regression was conducted to assess the relationship between perceived peer approval to have sex and heavy alcohol use at Wave I and sexual IPV at Wave III, after adjusting for demographic factors and other correlates of sexual IPV at Wave I, including age, race/ethnicity, sexual initiation in adolescence, parental attachment, annual family income, and neighborhood poverty. Boys who believed they would gain peer respect by having sex and boys who reported getting drunk in the last 12 months, regardless of how often, were significantly more likely to report sexual IPV in young adulthood compared to boys who did not endorse either of these factors. Targeting boys' perceived peer norms regarding sexual activity and heavy alcohol use may therefore be especially important for preventing sexual IPV later in life.

The Development and Initial Validation of the Youth Sexual Intention Scale: Indonesian Version

Interventions for the early sexual problem in adolescents require proper measurement of sexual intentions. The adolescent sexual intention scales have been widely used by researchers in the West. However, those scales are not very suitable for adolescents in eastern cultures such as Indonesia. As a religious society, Indonesian people have different sexual expectations from liberal western society. Religious teachings and societal norms shape sexual beliefs that reflect semi-restrictive sexual socialization. Thus, sexual intention measurement that represents the sexual beliefs of the subject under study becomes important. Therefore, this two-steps study aims to develop and validate the Youth Sexual Intention Scale (YSIS). In the first step, qualitative elaboration resulted in 27 themes of adolescent sexual beliefs, which turned into 31 items according to the Theory of Planned Behavior (TPB). In the second step, we selected 396 students using the cluster random sampling technique. We investigated 2 methods of validity, content validity using CVI and construct validity using confirmatory factor analysis (CFA). The content validity examination proved that all scale items had high validity (CVI = .93). Meanwhile, the CFA showed that the data was fit for the model (Chi-square 819,420, P <.001, RMSEA = .056, CFI = .978, TLI = .972). The CFA groups items into 4 dimensions, namely, sexual attitudes, subjective norms, perceived behavioral control, and sexual intentions. The reliability test shows an Alpha coefficient of .854. We conclude that 26-items YSIS is a valid and reliable instrument to measure belief-based youth sexual intentions (15–18 years) in religious culture.

Sexual debut among college students in China: effects of family context

This study examines family context and sexual debut among young people in China. Using data from the 2018 Panel Study of Chinese University Students (PSCUS), it explores how the family is correlated with sexual debut among young people in China aged 18-24 years. The Kaplan-Meier method was adopted to detect a survival function for different family factors and related demographic variables. Cox proportional hazard regression analysis was adopted to calculate hazard ratios for the timing of sexual debut. The average age of sexual debut among the college students was 18.39 years. The Kaplan-Meier analysis showed that sexual intercourse initiation was earlier for female students who had no siblings, and those who had a mother with senior high school (including technical school) education or higher family income, but this correlation was insignificant among male students. The multivariate hazard regression analysis revealed that living in a family with a higher level of fathers' education, having a lower level of family income and having siblings had positive correlations with later sexual debut among the college students. Moreover, family factors showed gender differences in their associations with the timing of sexual debut, typically parent's education level, family income and left-behind experience. This study provides a comprehensive perspective on the role of family influences in timing of sexual debut among youth in China.

A bio-ecological framing of evidence on the determinants of adolescent mental health - A scoping review of the international Health Behaviour in School-Aged Children (HBSC) study 1983-2020

This paper extracts, organises and summarises findings on adolescent mental health from a major international population study of young people using a scoping review methodology and applying a bio-ecological framework. Population data has been collected from more than 1.5 million adolescents over 37 years by the Health Behaviour in School-Aged Children: WHO Cross-National (HBSC) Study. The paper reviews the contribution that this long standing study has made to our understanding of the individual, developmental, social, economic, cultural determinants of adolescent mental health by organising the findings of 104 empirical papers that met inclusion criteria, into individual, microsystem, mesosystem and macrosystem levels of the framework. Of these selected papers, 68 were based on national data and the other 36 were based on international data, from varying numbers of countries. Each paper was allocated to a system level in the bio-ecological framework according to the level of its primary focus. The majority (51 papers) investigate individual level determinants. A further 28 concentrate primarily on the microsystem level, 6 on the mesosystem level, and 29 on the macrosystem level. The paper identifies where there is evidence on the determinants of mental health, summarises what we have learned, and highlights research gaps. Implications for the future development of this population health study are discussed in terms of how it may continue to illuminate our understanding of adolescent mental health in a changing world and where new directions are required.

Influence of Women's Empowerment on Place of Delivery in North Eastern and Western Kenya: A Cross-sectional Analysis of the Kenya Demographic Health Survey

Background: Labor and delivery under the supervision of a skilled birth attendant have been shown to promote positive maternal and neonatal outcomes; yet, more than a third of births in Kenya occur outside a health facility. We investigated the association between measures of women’s empowerment and health facility-based delivery in Northeastern and Western Kenya.

Methods: Analysis of 2014 Kenya Demographic and Health Survey data was conducted. Logistic regression adjusting for demographic factors, contraceptive use, and comprehensive HIV knowledge was used to assess the influence of the validated African Women’s Empowerment Index-East (AWEI-E) on the likelihood of women’s most recent birth having occurred in a health facility versus at home. Additionally, we explored the mediating effect of contraceptive use on women’s empowerment and health facility-based delivery.

Results: Compared to respondents with low or moderate empowerment scores, those with high empowerment scores were more likely to have given birth at a health facility [odds ratio (OR) = 1.81; 95% confidence interval (CI) = 1.30, 2.51], although this effect was null in the adjusted model (OR = 0.92, 95% CI = 0.58, 1.45). Respondents with a recent facility birth (n = 372/836) were more likely to have high household-level wealth (40.9% vs 8.6%, p < 0.001) and use a contraceptive method (44.9% vs 27.4%, p < 0.001) than those without facility-based delivery. Current contraceptive use mediated 26.8% of the effect of empowerment on the odds of facility-based delivery.

Conclusion: Women’s empowerment, and its comprising three domains as measured by the AWEI-E, may be insufficient to overcome barriers to facility-based delivery for women in North Eastern or Western Kenya. High women’s empowerment is strongly associated with current contraceptive use, which may inform pregnancy planning and location of delivery. Alternatively, higher empowered women who delivered at a facility may have been offered contraceptives at the time of delivery. Future research targeting these regions should explore culturally acceptable approaches to broadening access to skilled supervision of labor.

Feelings about the timing of first sexual intercourse and health-related quality of life among adolescents

BACKGROUND

Early sexual intercourse (SI) may have long-lasting negative impacts on health-related quality of life (HRQoL). So far, these impacts have been studied using age for defining early SI instead of feelings about its timing. The present study examined the association between feelings about the timing of first SI and current HRQoL.

METHODS

Data came from the 2014 cross-sectional Health Behaviour in School-aged Children (HBSC) study in French-speaking Belgium. Among participants aged 16-20 years who already had SI, 1778 were included in analyses. Univariate and multivariate logistic regressions were performed, including potential confounders.

RESULTS

One quarter of adolescents (26.4%) had poor HRQoL, 19.8% expressed a negative feeling about the timing of first SI and 19.6% did not think about it. Compared with adolescents who thought first SI happened at the right time or wished it had happened sooner, adolescents who had a negative feeling about the timing and those who did not think about it were more likely to have a poor HRQoL (cOR = 1.67 (1.28-2.17) and cOR = 1.37 (1.05-1.80), respectively). After adjustment, associations were no more significant (aOR = 1.22 (0.91-1.63) and aOR = 1.22 (0.91-1.64)). Sex disparity in expressing a negative feeling mostly explained the difference between crude and adjusted analyses.

CONCLUSION

Further research is needed to better understand such a complex relationship. The high proportion of adolescents having poor HRQoL and negative feeling about the timing of first SI shows how important it is to find out effective prevention for both domains.

Child Sexual Abuse and Intimate Partner Violence Victimization in Adulthood: Sex-Differences in the Mediating Influence of Age of Sexual Initiation

Child sexual abuse is a major public health concern in the United States with devastating sequelae. Although the relationship between child sexual abuse and intimate partner violence victimization in adulthood is known, little is known about the mediating influence of the age of sexual initiation on the association, or whether sex differences exist. Using data from waves I, III, and IV of the National Longitudinal Study of Adolescent to Adult Health (N = 1,163), we aimed to examine the mediating influence of age of sexual initiation on the association between child sexual abuse and intimate partner violence victimization in adulthood and identify sex differences. Findings reveal that in female survivors, age of sexual initiation partially mediated the association between child sexual abuse and physical intimate partner violence victimization in adulthood. In male survivors, no mediational effect was observed. Public health practitioners should be aware of sex differences in the effect of early sexual initiation on intimate partner violence victimization in adulthood among child sexual abuse survivors.

Abstinence-Only-Until-Marriage: An Updated Review of U.S. Policies and Programs and Their Impact

Adolescence is marked by the emergence of human sexuality, sexual identity, and the initiation of intimate relations; within this context, abstinence from sexual intercourse can be a healthy choice. However, programs that promote abstinence-only-until-marriage (AOUM) or sexual risk avoidance are scientifically and ethically problematic and-as such-have been widely rejected by medical and public health professionals. Although abstinence is theoretically effective, in actual practice, intentions to abstain from sexual activity often fail. Given a rising age at first marriage around the world, a rapidly declining percentage of young people remain abstinent until marriage. Promotion of AOUM policies by the U.S. government has undermined sexuality education in the United States and in U.S. foreign aid programs; funding for AOUM continues in the United States. The weight of scientific evidence finds that AOUM programs are not effective in delaying initiation of sexual intercourse or changing other sexual risk behaviors. AOUM programs, as defined by U.S. federal funding requirements, inherently withhold information about human sexuality and may provide medically inaccurate and stigmatizing information. Thus, AOUM programs threaten fundamental human rights to health, information, and life. Young people need access to accurate and comprehensive sexual health information to protect their health and lives.

Timing of Sexual Initiation and Relationship Satisfaction in Young Adult Marital and Cohabiting Unions

Using the National Longitudinal Study of Adolescent to Adult Health, this research examines the association between timing of oral sex initiation and marital and cohabiting relationship satisfaction among young adults. Findings indicate that women who transition to oral sex "late" or who have no oral sex experience report higher levels of relationship satisfaction in their current coresidential unions than do women who transition at a "normative" age. Higher levels of relationship satisfaction among women who transition "late," however, appear to be explained by their lower likelihood of experiencing forced sexual relations and sexually transmitted infections. We find no evidence of any association between timing of oral sex initiation and relationship satisfaction among men. To best promote healthy relationships, researchers, practitioners, and educators need to better understand the various types of sexual activities in which young people engage.

Latent classes of sexual behaviors: Prevalence, predictors, and consequences

Scholars of adolescent and emerging adult sexuality have recently begun to study how diverse patterns of sexual behaviors contribute to development and well-being. A person-oriented approach to studying sexual behaviors provides a nuanced understanding of sexual repertoires. The goals of this paper were to document patterns of sexual behaviors ranging from kissing to penetrative sex, and to examine how latent classes of behaviors, gender, and partner type (romantic vs. nonromantic) predict intra- and interpersonal consequences of sexual behaviors. Latent class analysis of a stratified random sample of U.S. college students revealed four classes of sexual behaviors: Kissing Only, Kissing and Touching, All Behaviors, and Oral and Penetrative Only. Compared to individuals in the All Behaviors class, individuals in the Kissing Only class were less likely to experience a positive or a negative intrapersonal consequence of sexual behaviors. Men were less likely to report a negative intrapersonal consequence than women were. Partner type predicted negative interpersonal consequences for the All Behaviors class. Implications are discussed in terms of normative sexual development, prevention, and sexual and relationship education.

Age-varying associations between nonmarital sexual behavior and depressive symptoms across adolescence and young adulthood

Research has demonstrated associations between adolescent sexual behavior and depressive symptoms, but no single study has examined individuals at different ages throughout adolescence and young adulthood in order to determine at what ages sexual behavior may be associated with higher or lower levels of depressive symptoms. Using nationally representative longitudinal data and an innovative method, the time-varying effect model (TVEM), which examines how the strength of an association changes over time, this study examines how nonmarital sexual intercourse is associated with depressive symptoms at different ages, which behaviors and contexts may contribute to these associations, and whether associations differ for male and female participants. Findings indicate that sexual behavior in adolescence is associated with a higher level of depressive symptoms, particularly for female adolescents, and this association is relatively consistent across different partner types and adolescent contexts. Associations between sexual behavior and depressive symptoms in young adulthood are more dependent on partner factors and adolescent contexts; sexual behavior in young adulthood is associated with fewer depressive symptoms for women who have sex with a single partner and for men whose parents did not strongly disapprove of adolescent sexual behavior. Findings suggest that delaying sexual behavior into young adulthood may have some benefits for mental health, although contextual and relationship factors also play a role. (PsycINFO Database Record

Timing of First Sexual Intercourse and Young Adult Health Outcomes

PURPOSE

To examine how age of onset of sexual intercourse is associated with past-year and lifetime sexually transmitted infections (STIs) and depression in young adulthood.

METHODS

We examined how occurrence of a lifetime and past-year STI, lifetime diagnosis of depression, and past-week depressive symptoms differed as a function of age of onset of sexual intercourse using data from the National Longitudinal Study of Adolescent to Adult Health (Add Health; N = 8,938 individuals). Time-varying effect models were used to examine how age of onset, measured as continuous age, was associated with these outcomes in young adulthood, with all analyses stratified to examine gender differences.

RESULTS

Individuals who engaged in first intercourse before age 16 reported higher than average rates of all outcomes studied; for example, an estimated 35% of women and 12% of men who initiated at age 14 years reported a lifetime STI, compared with about 5% of those who initiated at age 24 years. Timing of first intercourse past the mid-twenties was associated with lower than average rates of STIs and lifetime depression diagnoses but was associated with a somewhat higher level of past-year depressive symptoms. Patterns were similar by gender, although there was little difference in men's depression diagnoses by age of onset.

CONCLUSIONS

Results suggest that sexual intercourse before age 16 years may be associated with higher rates of STIs and depression. Findings provide support for comprehensive programs that both promote delay of first intercourse and provide safe sex and psychological support for those who initiate early.

Timing of First Sexual Intercourse and Young Adult Health Outcomes

PURPOSE

To examine how age of onset of sexual intercourse is associated with past-year and lifetime sexually transmitted infections (STIs) and depression in young adulthood.

METHODS

We examined how occurrence of a lifetime and past-year STI, lifetime diagnosis of depression, and past-week depressive symptoms differed as a function of age of onset of sexual intercourse using data from the National Longitudinal Study of Adolescent to Adult Health (Add Health; N = 8,938 individuals). Time-varying effect models were used to examine how age of onset, measured as continuous age, was associated with these outcomes in young adulthood, with all analyses stratified to examine gender differences.

RESULTS

Individuals who engaged in first intercourse before age 16 reported higher than average rates of all outcomes studied; for example, an estimated 35% of women and 12% of men who initiated at age 14 years reported a lifetime STI, compared with about 5% of those who initiated at age 24 years. Timing of first intercourse past the mid-twenties was associated with lower than average rates of STIs and lifetime depression diagnoses but was associated with a somewhat higher level of past-year depressive symptoms. Patterns were similar by gender, although there was little difference in men's depression diagnoses by age of onset.

CONCLUSIONS

Results suggest that sexual intercourse before age 16 years may be associated with higher rates of STIs and depression. Findings provide support for comprehensive programs that both promote delay of first intercourse and provide safe sex and psychological support for those who initiate early.

Modeling problem behaviors in a nationally representative sample of adolescents

Research on multiple problem behaviors has focused on the concept of Problem Behavior Syndrome (PBS). Problem Behavior Theory (PBT) is a complex and comprehensive social-psychological framework designed to explain the development of a range of problem behaviors. This study examines the structure of PBS and the applicability of PBT in adolescents. Participants were 6062 adolescents; aged 12-19 (51.3% female) who took part in the My World Survey-Second Level (MWS-SL). Regarding PBS, Confirmatory Factor Analysis established that problem behaviors, such as alcohol and drug use loaded significantly onto a single, latent construct for males and females. Using Structural Equation Modeling, the PBT framework was found to be a good fit for males and females. Socio-demographic, perceived environment system and personality accounted for over 40% of the variance in problem behaviors for males and females. Our findings have important implications for understanding how differences in engaging in problem behaviors vary by gender.

ERICA: sexual initiation and contraception in Brazilian adolescents

OBJECTIVE To estimate the prevalence of sexual initiation and contraceptive use at the last sexual intercourse of Brazilian adolescents, according to sociodemographic features. METHODS The data were obtained from the Study of Cardiovascular Risks in Adolescents (ERICA), a national school-based cross-sectional study. We included 74,589 adolescents from 32 geographic strata (27 capitals and five sets of municipalities with more than 100,000 inhabitants of each of the five macro-regions of the Country). Information on sexual initiation and contraceptive use at the last sexual intercourse (male condom and oral contraceptive pill) has been used. We have estimated prevalence and confidence intervals (95%CI) considering sample weights according to sex, age, type of school, residence status, macro-region and capitals. RESULTS We observed that 28.1% (95%CI 27.0-29.2) of the adolescents had already initiated sexual life, with higher prevalence among those aged 17 years (56.4%, 95%CI 53.9-58.9), males (33.5%, 95%CI 31.8-35.2), studying at public schools (29.9%, 95%CI 28.5-31.4), and from the Northern region (33.9%, 95%CI 32.3-35.4), mainly from Macapa, Manaus, and Rio Branco. Among those who had started their sexual life, 82.3% (95%CI 81.1-83.4) reported the use of contraceptive methods at the last intercourse, and the prevalence of use was higher among adolescents aged 17 years (85.3%, 95%CI 82.7-87.6), females (85.2%, 95%CI 83.8-86.5) and those living in the Southern region (85.9%, 95%CI 82.9-88.5). Male condom was used by 68.8% (95%CI 66.9-70.7), with no difference by type of school or macro-regions; the contraceptive pill was used by 13.4% (CI95% 12.2-14.6), and more frequently used among women (24.7%, 95%CI 22.5-27,0) and 17-year-old adolescents (20.8%, 95%CI 18.2-23.6) from urban settings(13.7%, 95%CI 12.5-14.9) and from the Southern region (22.6%, 95%CI 19.0-26.8), and less often in the Northern region. CONCLUSIONS ERICA's data analysis on sexuality and contraception shows heterogeneities in the prevalence of sexual initiation and use of contraceptive methods among Brazilian adolescents, depending on their age, where they live, and the type of school they study at. Younger adolescents and those living in the Northern region seem to be more vulnerable to the consequences of unprotected sexual intercourses.

Sexual initiation and emotional/behavioral problems in Taiwanese adolescents: a multivariate response profile analysis

This study aimed to investigate the relations of adolescent sexual experiences (particularly early initiation) to a spectrum of emotional/behavioral problems and to probe possible gender difference in such relationships. The 10th (N = 8,842) and 12th (N = 10,083) grade students, aged 16-19 years, participating in national surveys in 2005 and 2006 in Taiwan were included for this study. A self-administered web-based questionnaire was designed to collect information on sociodemographic characteristics, sexual experience, substance use, and the Youth Self-Report Form. For the sexually experienced adolescents, their sexual initiation was classified as early initiation (<16 years) or non-early initiation (16-19 years). Gender-specific multivariate response profile regression was used to examine the relationship between sexual experience and the behavioral syndromes. Externalizing problems, including Rule-breaking Behavior and Aggressive Behavior, were strongly associated with sexual initiation in adolescence; the magnitude of the association increased for earlier sexual initiation, especially for females. As to internalizing problems, the connection was rather heterogeneous. The scores on some syndromes, such as Somatic Complaints and Anxious/Depressed, were higher only for females with early or non-early sexual initiation whereas the score on Withdrawn, along with Social Problems that is neither internalizing nor externalizing, was lower for the sexually experienced adolescents than for the sexually inexperienced ones. We concluded that earlier sexual initiation was associated with a wider range of behavioral problems in adolescents for both genders, yet the increased risk with emotional problems was predominately found in females.

Social factors associated with readiness for sexual activity in adolescents: a population-based cohort study

Various factors are associated with sexual activity in adolescence and it is important to identify those that promote healthy and adaptive romantic and sexual development. The objectives of this study were to describe rates of early sexual intercourse (before 16 years) and sexual readiness in adolescence and to assess the extent to which these were social patterned. We prospectively studied nearly 5,000 15-year-olds from the Avon Longitudinal Study of Parents and Children, a UK birth cohort. Between 2006 and 2008, female and male participants answered a computer assisted interview about romantic and sexual behaviors in the last year. Predictors of sexual intercourse and readiness for sexual intercourse were examined across a range of sociodemographic measures. Overall, 17.7% (95% CI 16.7%, 18.9%) of participants reported having had sexual intercourse in the last year, with more girls than boys reporting sexual experience (risk ratio 1.30, 95% CI 1.15, 1.47). Of these, one-third of both male and female were classed as unready because they were unwilling, lacking in autonomy, felt regret or had not used contraception. There was strong evidence of social patterning for sexual activity with higher rates for young people from poorer homes, with lower social class, and with younger, less educated mothers. In contrast, among 860 young people who had had sexual intercourse, there was no clear evidence of associations between social factors and sexual readiness. The lack of social patterning in sexual readiness supports the provision of comprehensive education to develop life skills for adolescents across all social groups.

Characteristics of youth who report early sexual experiences in Sweden

Early timing of first sex is a common risk factor for adverse sexual and reproductive health (SRH) outcomes. This study explored characteristics and circumstances associated with early sexual experience (at or below age 14) among Swedish youth. Data were drawn from UngKAB09, a national study of youth SRH in Sweden. 24,000 youth 16-28 years were randomly selected for a web-based survey with a response rate of 24%. Post-stratification weights were used to correct for over- and underrepresentation in response. Adjusted logistic regression was used to model associations with early sexual experience, by gender. In the final sample (N = 5,321, 49% girls), 9 in 10 were sexually experienced, of whom 21% reported early first sex. In multivariate analysis, early sex was significantly associated with 7 of the 9 predictor variables selected for the model among boys and 14 of 15 selected factors among girls. Early sex was positively associated with low educational attainment, early pubertal onset, bisexual identity and (girls only) rural residence. For girls, first generation immigrant status, greater religiosity, conservative sexual attitudes and low Chlamydia knowledge decreased the odds of early sex. Early experience was more common if youth had older partners and, among girls, felt that sex was expected. Being in love, feelings of intimacy, alcohol use at first sex, and (girls only) causal sexual partner and wantedness of first sex were inversely associated with early first sex. The findings and implications are discussed in relation to the European and global literature on early sexual experiences.

Macro-level age norms for the timing of sexual initiation and adolescents' early sexual initiation in 17 European countries

PURPOSE

To examine the relationship between country-level age norms for sexual initiation timing and early sexual initiation (ESI) among adolescent boys and girls.

METHODS

Nationally representative data from 17 countries that participated in the 2006/2007 European Social Survey (ESS-3, n = 33,092) and the 2005/2006 Health Behaviour in School-Aged Children Study (HBSC, n = 27,702) were analyzed. Age norms were measured as the average country-level response to an item asking the age at which ESS respondents believed someone is too young to have sexual intercourse. HBSC respondents (aged 14-16 years) self-reported age at sexual initiation, which we defined as early (<15 years) or not early (≥15 years or no initiation). Control variables included age, family affluence, perceived socioeconomic status, family living arrangement, substance use, school attachment, and country-level legal age of consent. Multivariable three-level logistic models with random intercepts were run separately by sex.

RESULTS

In multivariable analyses, higher overall age norms were associated with reduced likelihood of ESI among girls (AOR .60, 95% CI .45-.79); associations with ESI were stronger for parent cohort (ages 31-65 years) norms (AOR .37, 95% CI .23-.58) than for peer cohort (ages 15-20 years) norms (AOR .60, 95% CI .49-.74). For boys, overall norms were also significantly negatively associated with ESI (AOR .68, 95% CI .46-.99), as were parent cohort norms (AOR .66, 95% CI .45-.96). Peer cohort norms were not significantly related to boys' ESI.

CONCLUSION

Macrolevel cultural norms may impact adolescents' sexual initiation timing. Research exploring the sexual health outcomes of early initiators in countries with contrasting age norms is warranted.

Early sexual debut and condom nonuse among adolescents in South Korea

BACKGROUND

The purpose of this study was to investigate the factors related to sexual debut among adolescents, and to examine the association between subject characteristics and condom nonuse among those who experienced sexual intercourse in South Korea.

METHODS

Data were obtained from the 2009 Korean Youth Risk Behaviour Survey, a nationally representative sample. Logistic regression analysis was conducted to investigate the factors related to sexual debut, associations of condom nonuse and subject characteristics.

RESULTS

Among male adolescents, age, early age at first emission, low academic achievement, living with a step-parent, perceived low level of household income, frequent drinking and smoking, and depressive feelings were associated with early sexual debut. Attending a coeducational school, living with a single biological parent and step-parent, risky health behaviour such as drinking and smoking, and depressive feelings were related risks factors for early sexual debut among female students. Factors associated with condom nonuse included early sexual debut (less than 16 years of age) (odds ratio (OR)=1.79, 95% confidence interval (CI)=1.32-2.43) and frequent smoking behaviour (OR=1.49, 95% CI=1.08-2.05) for males and early sexual debut (OR=4.37, 95% CI=1.02-18.68) and frequent drinking (OR=2.05, 95% CI=1.12-3.75) for females.

CONCLUSIONS

Appropriate interventions should be implemented for adolescents in Korea to delay sexual debut and educate them on the proper use of condoms.

Parents' support and knowledge of their daughters' lives, and females' early sexual initiation in nine European countries

CONTEXT

Associations between early sexual initiation and parental support and knowledge have not been uniformly tested in multiple European population-based samples. Understanding such associations is important in efforts to discourage females' early sex.

METHODS

Data were compiled for 7,466 females aged 14-16 who participated in the 2005-2006 Health Behaviors in School-Aged Children survey in nine countries (Austria, Finland, Greece, Hungary, Iceland, Lithuania, Romania, Spain and Ukraine). Univariate, bivariate and multivariable analyses were run with standard error corrections and weights to assess how sexual initiation before age 16 was related to maternal and paternal support and knowledge of daily activities.

RESULTS

Prevalence of early sexual initiation ranged from 7% (in Romania) to 35% (in Iceland). In bivariate analyses, maternal and paternal support were significantly negatively related to adolescent females' early sexual initiation in most countries. In models with demographic controls, parental support was negatively associated with early sexual initiation (odds ratio, 0.8 for maternal and 0.7 for paternal). After parental knowledge was added, early sexual initiation was no longer associated with parental support, but was negatively associated with maternal and paternal knowledge (0.7 for each). These patterns held across countries.

CONCLUSIONS

Parental knowledge largely explained negative associations between parental support and early initiation, suggesting either that knowledge is more important than support or that knowledge mediates the association between support and early sex.

Adolescent multiple risk behaviour: an asset approach to the role of family, school and community

BACKGROUND

Engagement in risk behaviours may pose a significant threat to health if involvement spans multiple behaviours. The asset model suggests that contextual aspects of young people's lives, such as factors related to family, school and community, serve as a protective function against health risk behaviours.

METHODS

A risk-taking index was created from the English health behaviour in school-aged children study on 15 years olds, substance use and sexual activity. Using a multinomial regression, potential asset variables relating to school, family, peers, community and family affluence were tested for their association with levels of risk behaviours.

RESULTS

Sense of neighbourhood belonging, strong school belonging and parental involvement in decision-making about leisure time were related to lower engagement in health risk behaviours. A weaker sense of family belonging was associated with increased risk behaviours if connectedness with teachers was also low. Factors related to school and community played a greater role in adolescent participation in health-related risk behaviours than family-related factors, including family affluence.

CONCLUSIONS

Feelings of safety and belonging in the out-of-home settings of adolescents were positively associated with reduced risk behaviours, and indicate the importance of the wider community alongside parents and school as protective assets for health.