
Period and Birth-Cohort Effects on Age of First Phencyclidine (PCP) Use Among Drug Users in New York City, 1960 to 2000
Keywords: HR، نسبت خطر; Phencyclidine; PCP; Birth Cohorts; Period Effects; Initiation; AgePCP, phencyclidine; HR, hazard ratio; CI, confidence interval; LSD, lysergic acid diethylamide; DEA, Drug Enforcement Agency; IDU, injection drug user; NIDU, non–injection drug user