Social and Structural Influences on Multiracial Identification and Health: a Public Health Mandate to Precisely Measure, Theorize, and Better Understand Multiracial Populations.

There is a growing group of adolescents and young adults in the USA who identify as multiracial. However, very little research, especially health research, focuses on understanding multiracial identification and health and behavioral outcomes for multiracial populations in comparison to their single-race counterparts. Understanding the intersectional influences on this identification process is critical to updating the literature on racial and ethnic identity and health with more accurate identifications and categories. It is especially critical that there is an explicit focus on understanding the impact of structural racism and discrimination when studying the process of racial identification and the impact on health. This review takes an interdisciplinary approach relying on a review of multiple research literatures: the historical literature on race, racism and categorization, psychological and adolescent medicine literatures on adolescent development, the sociological literature on racial and ethnic identification, and the limited public health research beginning to disentangle multiracial health outcomes. An empirically testable conceptual framework is offered to frame the organization of this review-demonstrating the multiple spheres of influence on racial and ethnic identification and the implication for health outcomes.

Effects of melatonin on insulin signaling and inflammatory pathways of rats with apical periodontitis.

AIM: To verify the effects of melatonin supplementation on insulin sensitivity, plasma concentrations of inflammatory cytokines, insulin signalling and inflammatory pathways in the soleus (SM) and extensor digitorum longus (EDL) muscles of rats with apical periodontitis (AP). METHODOLOGY: Seventy-two Wistar rats were distributed into 4 groups: (a) control (C), (b) control supplemented with melatonin (M), (c) AP (AP), and (d) AP supplemented with melatonin (AP + M). AP was induced by pulp exposure of the maxillary and mandibular right first and second molars to the oral environment. After AP induction, oral supplementation with 5 mg kg-1 melatonin (diluted in drinking water) for 60 days was initiated. At the end of the treatment, the following were analysed: (1) plasma concentrations of insulin and inflammatory cytokines (TNF-α, IL-6, IL-1ß and IL-10) using ELISA kits; (2) glycaemia using enzymatic assay; (3) insulin resistance using homoeostasis model assessment of insulin resistance (HOMA-IR) index; and (4) phosphorylation status of pp185 tyrosine, Akt serine, IKKα/ß, and JNK in SM and EDL using Western blot. Analysis of variance of two or three factors was performed, followed by the Bonferroni test. P values < 0.05 were considered statistically significant. RESULTS: AP promoted insulin resistance, significantly increased (P < 0.05) plasma concentrations of pro-inflammatory cytokines (TNF-α, IL-6, and IL-1ß), significantly decreased (P < 0.05) the concentration of anti-inflammatory cytokine IL-10, impaired insulin signalling in SM, and increased IKKα/ß phosphorylation status in SM and EDL. Melatonin supplementation in rats with AP improved insulin sensitivity, significantly decreased (P < 0.05) TNF-α and IL-1ß, significantly increased (P < 0.05) IL-10 plasma concentrations, and changed the insulin signalling in soleus muscle and IKKα/ß phosphorylation status in SM and EDL muscles. CONCLUSIONS: Melatonin is a potent adjuvant treatment for improving apical periodontitis-associated changes in insulin sensitivity, insulin signalling and inflammatory pathways. In addition, the negative impact of AP on general health was also demonstrated.

Adolescent contraception: review and guidance for pediatric clinicians.

The majority of adolescents initiate sexual activity during their teenage years, making contraception an important aspect of routine adolescent health care. Despite common misperceptions, all available methods of reversible contraception are appropriate for adolescent use. Contraceptive side effects profiles and barriers to use of certain methods should be considered when providing contraceptives to adolescents. In particular, ease of use, confidentiality, and menstrual effects are main concerns of adolescents. Contraceptive counseling with adolescents should describe method efficacy, discuss user preferences, explore barriers to use, counsel regarding sexually transmitted infection prevention, and consider what to do if contraception fails. Emergency contraception should be widely discussed with adolescents, as it is appropriate for use during gaps in other contraceptive use, method failure, and adolescents who are not using another form of contraception. Dual method use (condom plus a highly effective method of contraception) is the gold standard for prevention of both pregnancy and sexually transmitted infections.

Timing of alcohol and other drug use and sexual risk behaviors among unmarried adolescents and young adults.

CONTEXT: Although alcohol and drug use by young people has been associated with sexual risk behavior in some research, detailed data are lacking on the timing of substance use in relationship to sexual risk-taking. METHODOLOGY: Cross-sectional data on 7,441 unmarried young people aged 14-22 from the 1992 Youth Risk Behavior Survey (household supplement) were used in the analysis. Alcohol and other drug use at last sexual intercourse, substance use in the past 30 days (recent use), the number of different substances ever used (lifetime use) and age at initiation of alcohol use are examined here. The outcome variables assessed through multivariate regression analyses were condom use at last intercourse and more than one sexual partner in the past three months. RESULTS: Failure to use a condom was strongly associated with the lifetime substance-use scale or, alternatively, with age at initiation of alcohol. Once the number of substances ever used was controlled for, neither substance use at last sexual intercourse nor recent use was associated with the likelihood of using a condom at last coitus. Among young men and women, recent substance use and use of either alcohol or drugs at last intercourse were both strongly associated with having had more than one sexual partner in the past three months. For females only, lifetime use also increased the probability of recent multiple partners. CONCLUSIONS: The relationships between alcohol and other drug use and two sexual behaviors--condom use and multiple partners-suggest distinct mechanisms of influence and the need for different prevention strategies.

Abused boys, battered mothers, and male involvement in teen pregnancy.

BACKGROUND: The relationship between boyhood exposure to physical abuse, sexual abuse, or to a battered mother and subsequent risk of impregnating a teenage girl has not previously been examined. METHODS: In a retrospective cohort study set in a primary care clinic for adult members of a large health maintenance organization, questionnaire responses from 4127 men were analyzed. Respondents provided the age of the youngest female whom they had impregnated, their own ages at the time, and information regarding childhood exposure to physical or sexual abuse and battered mothers. We calculated the prevalence and adjusted odds ratio (OR) for having impregnated a teenage girl according to these 3 adverse childhood experiences, regardless of the male's age at the time of impregnation. Using logistic regression, ORs were adjusted for the male's age at time of survey, race, and education. RESULTS: Nineteen percent of the men reported that they had ever impregnated a teenage girl. During childhood, 32% of respondents had been physically abused, 15% sexually abused, and 11% had battered mothers. Compared with respondents reporting no abuse, frequent physical abuse or battering of mothers increased the risk of involvement in teen pregnancy by 70% (OR: 1.7; 95% confidence interval [CI]: 1.2-2.5) and 140% (OR: 2.4; 95% CI: 1.1-5.0), respectively. Sexual abuse as a boy at age 10 years or younger increased the risk of impregnating a teenage girl by 80% (OR: 1.8; 95% CI: 1.3-2.4); sexual abuse with violence increased the risk by 110% (OR: 2.1; 95% CI: 1.2-3.4). We found a dose-response relationship between the number of types of exposures and the risk of impregnating a teenage girl; men who reported all 3 types of exposures were more than twice as likely to have been involved than those with no exposures (OR: 2.2; 95% CI: 1.4-3.5). CONCLUSIONS: Boyhood exposure to physical or sexual abuse or to a battered mother is associated with an increased risk of involvement in a teen pregnancy-during both adolescence and adulthood. Because these exposures are common and interrelated, boys and adult men who have had these experiences should be identified via routine screening by pediatricians and other health care providers and counseled about sexual practices and contraception. Such efforts may prevent teen pregnancy and the intergenerational transmission of child abuse and domestic violence.

The association of sexual behaviors with socioeconomic status, family structure, and race/ethnicity among US adolescents.

OBJECTIVES: This study assessed the relation of socioeconomic status (SES), family structure, and race/ethnicity to adolescent sexual behaviors that are key determinants of pregnancy and sexually transmitted diseases (STDs). METHODS: The 1992 Youth Risk Behavior Survey/Supplement to the National Health Interview Survey provided family data from household adults and behavioral data from adolescents. RESULTS: Among male and female adolescents, greater parental education, living in a 2-parent family, and White race were independently associated with never having had sexual intercourse. Parental education did not show a linear association with other behaviors. Household income was not linearly related to any sexual behavior. Adjustment for SES and family structure had a limited effect on the association between race/ethnicity and sexual behaviors. CONCLUSIONS: Differences in adolescent sexual behavior by race and SES were not large enough to fully explain differences in rates of pregnancy and STD infection. This suggests that other factors, including access to health services and community prevalence of STDs, may be important mediating variables between SES and STD transmission and pregnancy among adolescents.

Strategies to maximize retention of a sample of young adolescents in a longitudinal evaluation of Healthy & Alive!

The authors implemented strategies to maximize cohort retention to avert loss of statistical power and minimize bias in a longitudinal evaluation of a middle school HIV/STD prevention intervention. A retention rate of 80% of the baseline sample (n = 2,975) at six months and 73% at 18 months was achieved despite high reported rates of student mobility and a major system reorganization in one urban district. The strategies increased retention but did not eliminate differences in demographic characteristics and behaviors between the groups of retained and lost students. Results confirm the need to implement retention strategies early and to maintain them throughout data collection. Information from a tracking data base can be used to prioritize students for follow-up to reduce bias from sample loss.

Adolescent sexual behavior: estimates and trends from four nationally representative surveys.

CONTEXT: Accurate information about trends over time in adolescent sexual behavior is essential to understand changes in adolescent pregnancy and sexually transmitted diseases and to monitor the progress of health promotion activities in the United States METHODS: Estimates from the National Survey of Family Growth (NSFG), the National Survey of Adolescent Males (NSAM), the Youth Risk Behavior Survey (YRBS) and the National Longitudinal Study of Adolescent Health (Add Health) were compared. While methodologies and populations varied by survey, adolescents aged 15-17 who attend high school were a common subpopulation among all four. For each survey, the prevalence of sexual intercourse, contraceptive use and multiple sexual partners was measured in this population. RESULTS: Trend comparisons fell into four categories. First, some similar significant trends were found across surveys. The proportion of all males and of white males who reported ever having had sexual intercourse decreased significantly, while condom use rose significantly among males in both the NSAM and the YRBS. For such behaviors as ever having had sexual intercourse (among Hispanic males and black females), using the pill and using the condom (among all females) and having four or more lifetime sexual partners (among white males), a significant trend was found in one survey while a similar but nonsignificant trend was found in another. Several trend comparisons were not significant in any survey. Finally, having had intercourse in the past three months (among all males and all females), having had two or more partners in the past three months (for males) and having had four or more lifetime sexual partners (among white females and all males) showed a significant trend in one survey but lacked a parallel nonsignificant trend in another. Prevalence estimates in 1995 differed significantly in at least one comparison of surveys for all behaviors except having four or more lifetime sexual partners (both genders) and having two or more recent sexual partners (females). Gender differences within the YRBS and between the NSFG and the NSAM generally were consistent. CONCLUSIONS: Trends over time and gender differences were similar across surveys, underscoring their value for tracking adolescent sexual behaviors. Differences in prevalence estimates across surveys probably result from differences in question wording, diverse interview settings and modes of data collection, and varying statistical power. These findings suggest a need to increase our understanding of how methodologies influence survey response in research on adolescents.

Use of birth control pills, condoms, and withdrawal among U.S. high school students.

PURPOSE: To examine the use of contraception at last sexual intercourse among currently sexually active adolescents. METHODS: We analyzed data from national school-based Youth Risk Behavior Surveys (YRBS) conducted in 1991, 1993, 1995, and 1997. The YRBS is a self-administered, anonymous survey which uses a national probability sample of U.S. students in public and private schools from grades 9 through 12. RESULTS: From 1991 to 1997, condom use significantly increased (from 46% to 57%), birth control pill use decreased (from 21% to 17%), and use of withdrawal significantly decreased (from 18% to 13%). In 1997, although more students were using condoms, 13% reported using withdrawal and 15% reported using no method to prevent pregnancy at last sexual intercourse. In 1997, condom use among females was significantly lower in the 9th grade than in the 12th grade (p <.001), whereas birth control pill use was higher (p <.001) and use of withdrawal remained stable. Among males, condom use and withdrawal use remained stable from 9th to 12th grade, whereas birth control pill use by their partner increased (p <.001). CONCLUSIONS: Inadequate contraceptive use among sexually active adolescents continues to be a major public health problem in the United States. For young people who will not remain sexually abstinent, families, health care providers, schools, and other influential societal institutions should promote the correct and continued use of condoms as essential protection against sexually transmitted diseases and human immunodeficiency virus infection.

Unintended pregnancy among adult women exposed to abuse or household dysfunction during their childhood.

CONTEXT: Studies have identified childhood sexual and physical abuse as a risk factor for adolescent pregnancy but the relationship between exposure to childhood abuse and unintended pregnancy in adulthood has, to our knowledge, not been studied. OBJECTIVE: To assess whether unintended pregnancy during adulthood is associated with exposure to psychological, physical, or sexual abuse or household dysfunction during childhood. DESIGN AND SETTING: Analysis of data from the Adverse Childhood Experiences Study, a survey mailed to members of a large health maintenance organization who visited a clinic in San Diego, Calif, between August and November 1995 and January and March 1996. The survey had a 63.4% response rate among the target population for this study. PARTICIPANTS: A total of 1193 women aged 20 to 50 years whose first pregnancy occurred at or after age 20 years. MAIN OUTCOME MEASURE: Risk of unintended first pregnancy by type of abuse (psychological, physical, or sexual abuse; peer sexual assault) and type of household dysfunction (physical abuse of mother by her partner, substance abuse by a household member, mental illness of a household member). RESULTS: More than 45% of the women reported that their first pregnancy was unintended, and 65.8% reported exposure to 2 or more types of childhood abuse or household dysfunction. After adjustment for confounders (marital status at first pregnancy and age at first pregnancy), the strongest associations between childhood experiences and unintended first pregnancy included frequent psychological abuse (risk ratio [RR], 1.4; 95% confidence interval [CI], 1.2-1.6), frequent physical abuse of the mother by her partner (RR, 1.4; 95% CI, 1.1-1.7), and frequent physical abuse (RR, 1.5; 95% CI, 1.2-1.8). Women who experienced 4 or more types of abuse during their childhood were 1.5 times (95% CI, 1.2-1.8) more likely to have an unintended first pregnancy during adulthood than women who did not experience any abuse. CONCLUSIONS: This study indicates that there may be a dose-response association between exposure to childhood abuse or household dysfunction and unintended first pregnancy in adulthood. Additional research is needed to fully understand the causal pathway of this association.

Developing quality measures for adolescent care: validity of adolescents' self-reported receipt of preventive services.

OBJECTIVE: To demonstrate the feasibility of directly surveying adolescents about the content of preventive health services they have received and to assess the validity of adolescent self-reported recall. DATA SOURCES/SETTING: Audiotaped encounters, telephone interviews, and chart reviews with 14-21 year olds being seen for preventive care visits at 15 pediatric and family medicine private practices, teaching hospital clinics, and health centers. DESIGN: 537 adolescents presenting for well visits were approached, 400 (75 percent) consented, 374 (94 percent) were audiotaped, and 354 (89 percent) completed telephone interviews either two to four weeks or five to seven months after their visits. Audiotapes were coded for screening and counseling across 34 preventive service content areas. Intraobserver reliability (Cohen's kappa) ranged from 0.45 for talking about peers to 0.94 for discussing tobacco. The sensitivity and specificity of the adolescent self-reports were assessed using the audiotape coding as the gold standard. RESULTS: Almost all adolescents surveyed (94 percent) remembered having had a preventive care visit, 93 percent identified the site of care, and most (84 percent) identified the clinician they had seen. There was wide variation in the prevalence of screening, based on the tape coding. Adolescent self-report was moderately or highly sensitive and specific at two weeks and six months for 24 of 34 screening and counseling items, including having discussed: weight, diet, body image, exercise, seatbelts, bike helmet use, cigarettes/smoking, smokeless tobacco, alcohol, drugs, steroids, sex, sexual orientation, birth control, condoms, HIV, STDs, school, family, future plans, emotions, suicidality, and abuse. Self-report was least accurate for blood pressure/cholesterol screening, immunizations, or for having discussed fighting, violence, weapon carrying, sleep, dental care, friends, or over-the-counter drug use. CONCLUSION: Adolescents' self-report of the care they have received is a valid method of determining the content of preventive health service delivery. Although recall of screening and counseling is more accurate within two to four weeks after preventive care visits, adolescents can report accurately on the care they had received five to seven months after the preventive health care visits occurred.

Sexually transmitted diseases, unintended pregnancy, and adolescent health promotion.

Adolescence is a critical period in the development of sexual behaviors that may lead to acquiring sexually transmitted diseases (STDs), including human immunodeficiency virus (HIV), and to unintended pregnancy. Understanding adolescent sexual behavior is essential for understanding adolescents' risk of pregnancy and STD/HIV infection and for planning and evaluating health promotion activities. This chapter reviews the sexual behaviors and psychosocial factors associated with STDs and unintended pregnancy among adolescents as well as school-, community-, and clinic-based interventions designed to reduce risk behaviors and promote adolescent sexual health.

Correlates of condom use stage of change: implications for intervention.

A telephone survey was used to collect data on attitudes, beliefs, and practices concerning condom use among 812 African Americans with regular sex partners and of reproductive age in Baltimore. Condom use was "staged" according to Prochaska's model of stage of behavioral change. Characteristics of the respondents' sexual relationships, peer characteristics, and demographic and psychosocial characteristics were examined for their association with the stage of condom use. Multiple logistic regression analysis revealed that a partner's reaction to condom use, condom use self-efficacy with the partner, condom use outcome expectancy with the partner, perceived partner risk, length of relationship, sterility, cohabitation, perceived vulnerability to HIV infection and perceived peer norms about condom use were each independently related to staged condom use. Gender differences in the relationship of these independent variables with stages of change were found. Implications for intervention include differential treatment by gender and stage of change. Couples should also be considered for intervention.

PIP: According to 1996 US Centers for Disease Control data, HIV/AIDS has become the second and third leading cause of death for Black and Hispanic women, respectively, in the US aged 25-44 years. The main risks for infection among minority women are IV drug use and sexual contact with IV drug users. Findings are presented from a telephone survey conducted to collect data on the attitudes, beliefs, and practices concerning condom use among 812 reproductive-age African Americans with regular sex partners in Baltimore. Condom use was "staged" according to Prochaska's model of stage of behavioral change, while characteristics of the respondents' sexual relationships, peer characteristics, and demographic and psychosocial characteristics were examined for their association with the stage of condom use. Multiple logistic regression analysis found that a partner's reaction to condom use, condom use self-efficacy with the partner, condom use outcome expectancy with the partner, perceived partner risk, length of relationship, sterility, cohabitation, perceived vulnerability to HIV infection, and perceived peer norms about condom use were each independently related to staged condom use. Gender differences in the relationship of those independent variables with stages of change were found. Implications for intervention include differential treatment by gender and stage of change. Couples should also be considered for intervention.

Multiple sexual partners among U.S. adolescents and young adults.

CONTEXT: Because many teenagers and young adults fail to use condoms correctly and consistently, the number of sexual partners they have is an important risk factor for sexually transmitted diseases, including HIV. Identifying factors that are associated with having multiple partners can help in the design of disease interventions. METHODS: Data on 8,450 males and females aged 14-22 who participated in the 1992 Youth Risk Behavior Survey were used to examine the prevalence of and factors associated with young people's having multiple partners. RESULTS: In all, 63% of female respondents and 64% of males were sexually experienced. Among those who had had sex during the three months before the survey, 15% and 35%, respectively, had had two or more partners during that period. At each age, the majority of sexually experienced respondents had had more than one lifetime partner; between ages 14 and 21, the proportion who had had six or more rose from 8% to 31% among females and from 14% to 45% among males. In logistic regression analyses, alcohol use, illicit drug use and young age at first coitus were associated with increased odds that females had had two or more partners in the previous three months, and being married lowered the odds; black or Hispanic race or ethnicity, alcohol use and young age at first coitus increased the odds for males, and being married reduced the odds. As the number of reported alcohol-related behaviors increased, the adjusted proportion of respondents who had recently had multiple partners rose from 8% to 48% among females and from 23% to 61% among men. CONCLUSIONS: The strong association between alcohol use and having multiple sexual partners underscores the need to educate young people about the effects of alcohol on partner choice and the risk of infection with sexually transmitted diseases.

PIP: This study estimated the prevalence of having multiple sex partners (MSPs) and examined potential risk factors associated with having MSPs among adolescents and youth in the US. Data were obtained from the 1992 National Health Interview Survey and Youth Risk Behavior Survey among a multistage probability cluster sample that was weighted to represent the youth aged 12-21 years. This analysis was based on a limited sample of 4075 youth who were sexually experienced (SE). Initial factor analysis yielded 2 clusters related to first intercourse: substance use and weapon carrying or fighting. Weapons was excluded due to poor internal consistency. Orthogonal rotation revealed 2 cluster factors: alcohol use and illicit drug use. Cross-tabulations were used to identify potential independent predictors. Logistic regression was used to estimate the independent influence of predictors. Findings indicate that most had 2 or more lifetime partners (LPs). The proportion of those with 6 or more LPs rose from 8% at age 14 to 31% at age 21 among females and from 14% to 45% among males. Only 20% of SE females and 13% of SE males reported 1 lifetime partner. Alcohol use, illicit drug use, and young age at first intercourse were associated with increased odds of females having 2 or more partners in the preceding 3 months. Marriage lowered the odds for both sexes. The same 3 factors, in addition to being Black or Hispanic, increased the odds for males. Increases in alcohol-related behaviors contributed to increases in adjusted proportions of recent MSPs from 8% to 48% among females and from 23% to 61% among males.

The decline in US teen pregnancy rates, 1990-1995.

OBJECTIVES: Estimate pregnancy, abortion, and birth rates for 1990 to 1995 for all teens, sexually experienced teens, and sexually active teens. DESISN: Retrospective analysis of national data on pregnancies, abortions, and births. Participants. US women aged 15 to 19 years. OUTCOME MEASURES: Annual pregnancy, abortion, and birth rates for 1990 to 1995 for women aged 15 to 19 years, with and without adjustments for sexual experience (ever had intercourse), and sexual activity (had intercourse within last 3 months). RESULTS: Approximately 40% of women aged 15 to 19 years were sexually active in 1995. Teen pregnancy rates were constant from 1990 to 1991. From 1991 to 1995, the annual pregnancy rate for women aged 15 to 19 years decreased by 13% to 83.6 per 1000. The percentage of teen pregnancies that ended in induced abortions decreased yearly; thus, the abortion rate decreased more than the birth rate (21% vs 9%). From 1988 to 1995, the proportion of sexually experienced teens decreased nonsignificantly. CONCLUSIONS: After a 9% rise from 1985 to 1990, teen pregnancy rates reached a turning point in 1991 and are now declining. Physicians should counsel their adolescent patients about responsible sexual behavior, including abstinence and proper use of regular and emergency contraception.

Sexual behavior among U.S. high school students, 1990-1995.

CONTEXT: High rates of unintended pregnancy and sexually transmitted diseases (STDs), including HIV infection, among adolescents are major public health concerns that have created interest in trends in teenage sexual activity. METHODS: Nationally representative data from Youth Risk Behavior Surveys conducted in 1990, 1991, 1993 and 1995 are used to examine levels of sexual experience, age at first intercourse, current sexual activity and condom use at last intercourse among students in grades 9-12. RESULTS: The proportion of students who reported being sexually experienced remained at 53-54% from 1990 through 1995, while the percentage of sexually active students who used condoms at last intercourse rose from 46% to 54% between 1991 and 1995. Black students were more likely than white students to report being sexually experienced, being currently sexually active and having had four or more lifetime sexual partners; black students also reported a significantly younger age at first intercourse. Gender differences in sexual behavior were found more frequently among black students than among white or Hispanic students. CONCLUSIONS: Although levels of sexual experience for high school students in the United States have not risen during the 1990s, a very high percentage of students continue to be at risk for unintended pregnancy and STDs, including HIV infection.

PIP: Nationally representative self-reported data from Youth Risk Behavior Surveys conducted in the US in 1990, 1991, 1993, and 1995 were used to examine levels of sexual experience, age at first intercourse, current sexual activity, and condom use at last intercourse among students in grades 9-12. The surveys sampled students at public and private schools in the 50 states and the District of Columbia; 11,631 in 1990, 12,272 in 1991, 16,296 in 1993, and 10,904 in 1995. Schools with high percentages of Black and Hispanic students were sampled at a higher rate. The proportion of students who reported being sexually experienced remained at 53-54% during 1990-95, while the percentage of sexually active students who used condoms at last intercourse increased from 46% in 1991 to 54% in 1995. Black students were more likely than White students to report being sexually experienced, being currently sexually active, and having had 4 or more lifetime sex partners. The median age reported for first intercourse was 16.5 years in all years. In 1995, the median age at first intercourse was 15.0 years among Blacks, 16.2 years among Hispanics, and 16.7 years among Whites. Gender differences in sexual behavior were found more often among Black students than among White and Hispanic students.