“…Much of this prior research on gender differences in addiction and treatment careers was established with primary opiate users (Anglin, Hser, & Booth, 1987;Gerstein, Judd, & Rovner, 1979;Kosten, Rounsaville, & Kleber, 1985;Marsh & Simpson, 1986) and with follow-up periods of limited duration (Chatham, Hiller, Rowan-Szal, Joe, & Simpson, 1999). The study findings are consistent with other research showing gender differences among cocaine users at admission to and shortly following treatment (Boyd & Mieczkowski, 1990;Griffin, Weiss, Mirin, & Lange, 1989;Lundy, Gottheil, Serota, Weinstein, & Sterling, 1995;Weiss, Martinez-Raga, Griffin, Greenfield, & Hufford, 1997).…”