alcohol were not the primary focus (e.g., methadone maintenance programs were not included); and 3) first line of treatment entry (i.e., programs limited to aftercare were excluded). The overall recruitment rate for the treatment sample was 80% (88% in the public programs, 77% in the private programs). The recruitment period differed between programs because of their intake flow, and these sampling logistics necessitated construction of weights (by gender and ethnicity) so that the sample properly represented its proportionate size and case mix among new treatment intakes. Weights ranged from .41 (for white females in one of the private programs) to 2.92 (for white males in one of the public detoxification programs) (Kaskutas et al., 1997a; Tam, 1997).
