All estimates were standardized to US Census data on the demographic characteristics of the adolescent population, as recommended by the Add Health research team Age at first sexual intercourse was not associated with being dropped from the sample due to incomplete data. Over the past several years, substantial funding has been directed toward programs designed to delay first sexual intercourse among adolescents i. These specimens were analyzed for the presence of C.
Black or other , and parental education highest level of education attained by either parent, categorized as less than high school referent , completion of high school, some additional training, and college graduation. We included interaction terms in the full logistic regression model to determine whether the association between age at first intercourse and STI prevalence varied by the sex, race, ethnicity, parental education, or current age of the respondent. Younger ages at first intercourse were associated with higher odds of STI in comparison with older ages, but the effect diminished with increasing current age. Analyses using chlamydial infection alone as the outcome not shown produced results similar to those for all three STIs combined. We used simple logistic regression to obtain adjusted estimates of the prevalence odds ratios for having an STI at wave 3. During the in-home interviews, a questionnaire containing sensitive questions on sexual activity was administered using computer-assisted self-interviewing technology. Nonnormative sexual scripts and early first sexual intercourse an off-time event may represent a life-course transition that increases the likelihood of a longitudinal pattern of risky sexual activity. Age at first sexual intercourse was used as a continuous variable. With regard to sexual behavior, adolescents develop elaborate sets of ideas concerning sexuality and their sexual roles well before they actually engage in sexual activity The majority of respondents were White and non-Latino table 1. The authors used multiple logistic regression to assess the relation between age at first sexual intercourse and these STIs and to examine variation by current age, sex, race, and ethnicity. Little is known about the relation between age at first sexual intercourse and longitudinal risk of STI by sex, race, or ethnicity. These demographic factors have been associated with variation in mean age of first sexual intercourse and with extremely wide variation in STI prevalence 21 , 24 — Little is known about the long-term consequences of early sexual intercourse. Of the 14, respondents with assigned sampling weights in wave 3, 12, reported ever having had intercourse. We examined the following research questions: This is an important question, because contracting STIs during young adulthood can have significant adverse consequences for reproductive health. Age at first sexual intercourse ranged from 10 years through 25 years, with a mean of In the initial full model, all variables and terms for interaction with age at first sexual intercourse were entered simultaneously. We chose this composite measure because of the low prevalence of N. Respondent's sex, race, ethnicity, and parental education, which are associated with contracting an STI, were controlled for in multiple logistic regression analyses. Current age was defined as the respondent's age at the time of wave 3 questionnaire administration and was also used as a continuous variable. In Europe, women aged 16—44 years visiting family planning centers who reported first having intercourse at age 16 or younger did not have a greater prevalence of Chlamydia trachomatis Age at first sexual intercourse was not associated with being dropped from the sample due to incomplete data. In this study, our goal was to clarify the long-term sexual health consequences of the timing of first sexual intercourse and to elucidate how such consequences might vary by characteristics of the individual. Data analysis We used Stata software version 7. STIs can cause complications such as pelvic inflammatory disease, infertility, ectopic pregnancy, preterm birth, and fetal abnormalities 18 ,
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