Predictors and prevention of nonfatal overdose among street-recruited injection heroin users in the San Francisco Bay Area, 1998-1999

Objectives. This study sought to determine prevalence of and risk factors for nonfatal recent overdose among street-recruited injection heroin users. Methods. From August 1998 through July 1999, 1427 heroin injectors were recruited from 6 innercity neighborhoods in the San Francisco BayArea, Calif, and interviewed. Factors hypothesized to be associated with recent overdose were analyzed with logistic regression. Results. Of the 1427 participants, 684 (48%) had had an overdose, 466 (33%) had experienced 2 or more overdose events, and 182 (13%) had had a recent overdose. In multiple logistic regression, being younger (adjusted odds ratio [OR] for each year of increasing age = 0.95; 95% confidence interval [CI] = 0.94, 0.97), having been arrested 3 or more times in the past year (adjusted OR = 2.50; 95% CI = 1.61, 3.87), drinking 4 or more alcoholic drinks per day (adjusted OR = 2.05; 95% CI = 1.37, 3.05), and having participated in methadone detoxification during the past year (adjusted OR = 1.47; 95% CI = 1.03, 2.09) were independently associated with recent overdose. Being homeless; identifying as gay, lesbian, bisexual, or transgender; having spent 5 or more years in prison or jail; and having engaged in sex work also were associated with recent overdose. Conclusions. Targeted interventions that decrease risk for overdose are urgently needed.