Crack Cocaine use in a Cohort of Methadone Maintenance Patients

The authors examined crack use in a cohort of methadone patients originally enroled in 1984-86. Of the 494 methadone patients originally enroled, 228 subjects remained in methadone and were re-interviewed in 1987-88, and 234 remained in methadone were reinterviewed in 1988-89. Approximately 1/4 of the subjects were using crack at each of the data collection points, and only 3% of the subjects were using crack at daily or greater frequencies. (17 refs.)