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Sastry's 10-year study of New Orleans Katrina evacuees shows demographic differences between returning and nonreturning

Stafford says less educated, smaller investors more likely to sell off stock and lock in losses during market downturn

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Deirdre Bloome wins ASA award for work on racial inequality and intergenerational transmission

Bob Willis awarded 2015 Jacob Mincer Award for Lifetime Contributions to the Field of Labor Economics

David Lam is new director of Institute for Social Research

Elizabeth Bruch wins Robert Merton Prize for paper in analytic sociology

Next Brown Bag

Monday, Oct 12
Joe Grengs, Policy & Planning for Social Equity in Transportation

Period and Birth-Cohort Effects on Age of First Phencyclidine (PCP) Use among Drug Users in New York City, 1960 to 2000

Archived Abstract of Former PSC Researcher

Bryant, W.K., D.C. Ompad, J. Ahern, Y.F. Wu, D. Vlahov, and Sandro Galea. 2006. "Period and Birth-Cohort Effects on Age of First Phencyclidine (PCP) Use among Drug Users in New York City, 1960 to 2000." Annals of Epidemiology, 16(4): 266-272.

PURPOSE: The aim of the study is to determine period and birth-cohort effects in the early initiation of phencyclidine (PCP) use in drug users in New York City (NYC). METHODS: We analyzed data collected from two surveys of street-recruited drug users in NYC. We used Survival analysis and proportional hazards modeling to assess period and birth-cohort effects on risk for early initiation of PCP use.

RESULTS: Of 787 participants, 292 (37.1%) had used PCP by the age of 23 years. Before 1987, there was a greater risk for initiation of PCP use through the age of 23 years (hazard ratio [HR] = 34-77; 95% confidence interval [CI], 21.45-56.36). Proportional hazards modeling showed that those born in the 1971 to 1975 birth cohort compared with those born in 1976 to 1980 had a lower risk for initiation Of PCP use through age 23 years (HR = 0.58; 95% CI, 0.37-0.91). Other significant predictors of PCP use by age 23 included white race and having been in a juvenile detention center.

CONCLUSIONS: There are period and birth-cohort differences in the likelihood of early initiation of PCP use. Changes in drug Culture and social norms may influence the likelihood of initiation of PCP use. This may have implications for interventions aimed at slowing the nationwide increase in use of PCP.

DOI:10.1016/j.annepidem.2005.07.059 (Full Text)

Country of focus: United States of America.

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