As shown in Table 5, parental separation in EA families predicted earlier first sex across predicted probability of separation, with the exception of the lowest quintile (0–20%ile), where statistical power was especially limited. In the highest quintile, for example, 21% of offspring from separated families reported voluntary sex by age 15, compared to 6% of offspring from intact families at similarly high risk of parental separation. Because of imperfect matching on paternal alcoholism in the highest quintile, follow-up logistic regression analyses were conducted controlling for paternal alcoholism, and comparable effects of parental separation were observed (p<0.05).
