Eighty-nine percent of the sample was female, and 11 percent male. Data were collected at an intake interview administered at the time the subjects entered outpatient treatment at the Child Sexual Abuse Treatment Program in San Jose, Calif. Subjects were interviewed from January 1984 to March 1985. Data were analyzed by means of t-tests, chi-square analyses, and Fisher's Exact Test of Probability. Results indicate that boys and girls were equally likely to be molested by natural fathers, girls were more likely to be molested by stepfathers, and boys were more likely to be molested by friends of the family. Molestation started at the same age for boys and girls, but lasted longer and ended at a later age for girls. Males and females were equally likely to experience fondling from the waist down and oral intercourse; however, there were significant differences for incidence of anal intercourse and fondling from the waist up. Findings are discussed in the context of previous research in the field. 14 references