View large Download slide. Age at first sexual intercourse was not associated with being dropped from the sample due to incomplete data. Early initiation of sexual intercourse has been linked to increased risk of sexually transmitted infections STIs and pregnancy during adolescence 23. Negative consequences may accumulate to affect sexual functioning and relationship skills 16 For older adolescents, age at first intercourse made a significant difference in the prevalence odds ratio. Adolescent sexual behavior, drug use, and violence: Inconsistencies in reporting the occurrence and timing of first intercourse among adolescents.
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Stata statistical software, release 7. We used simple logistic regression to obtain adjusted estimates of the prevalence odds ratios for having an STI at wave 3. Results have been mixed. Respondent's sex, race, ethnicity, and parental education, which are associated with contracting an STI, were controlled for in multiple logistic regression analyses. Furthermore, future research on the consequences of the timing of first intercourse should not focus exclusively on females. Participants lost to follow-up were significantly older, a difference that was due primarily to the design decision not to follow wave 1 seniors at wave 2