Characteristics of the abuse experience by 135 women entering an outpatient treatment program for survivors of childhood sexual abuse were assessed utilizing a structured clinical interview. Areas assessed included: nature, frequency and duration of the abuse; participant's age at onset of abuse; perpetrator characteristics; childhood physical abuse experiences; and circumstances leading to abuse cessation. Participants who had been molested by more than one perpetrator were administered questions about the abuse committed by each perpetrator separately. Abuse by the first individual to molest a participant was found to be more likely to be incestuous, of higher frequency, and more extensive and invasive than that by later perpetrators. Survivors seeking therapy indicated experiencing considerably more severe abuse, at a younger age, for longer duration, and at the hands of more perpetrators than previously reported in the literature on nonclinical samples of survivors.