Sisters' and Girlfriends' Sexual and Childbearing Behavior: Effects on Early Adolescent Girls' Sexual Outcomes.

This study examined three key issues related to the effects of sisters' and girlfriends' sexual and childbearing behavior on early adolescent girls' sexual outcomes. Subjects were 455 girls from predominantly minority racial backgrounds. Results indicated that number of sexually active girlfriends, number of sexually active sisters, and presence of an adolescent childbearing sister were positively associated with permissive sexual attitudes, positive intentions for future sexual activity, and a greater likelihood of being a nonvirgin. The strength of these relationships did not vary by race, but there was a greater presence of permissive social influences for African American girls than for nonblack girls. Results from multiple hierarchical regression analyses indicated that having both many sexually active girlfriends and an adolescent childbearing sister had particularly strong effects on permissive sexual attitudes and a nonvirgin status.