PARTICIPANTS: The records of 643 veterans treated in DAP (residential rehabilitation treatment program) at a Veteran's Administration hospital between November, 2009 and March, 2011 were analyzed retrospectively in a quasi-experimental design. The researchers were not blind to participation and participation in the program was an elective component, not randomized. All patients enrolled in DAP were eligible to participate in a novel program called Natural Recovery. Fifteen percent participated in Natural Recovery-Horticulture (n=101), five percent participated in Natural Recovery-Art/Music (n=30) and seventy-nine percent elected to participate in the DAP Core Program only (DAP-CP) (n=512). One percent (n=8) participated in both tracks of Natural Recovery.