Crack cocaine trajectories among users in a midwestern American city
Crack cocaine trajectories among users in a midwestern American city
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DOI：
10.1111/j.1360-0443.2007.01915.x
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发表时间：
2007-09-01
期刊：
影响因子：
6
通讯作者：
Carlson, Robert G.
中科院分区：
文献类型：
--
作者：
Falck, Russel S.;Wang, Jichuan;Carlson, Robert G.
Aims Although crack cocaine first appeared in cities in the United States in the mid-1980s, little is known about its use over long periods of time. This study identified crack cocaine user groups on the basis of long-term trajectories. Design Following a natural history approach, data were collected periodically from 1996 to 2005. Group-based modeling assessed the probability of a crack smoker becoming abstinent during the observation period. Settings A targeted sampling plan guided the recruitment of a community sample of crack cocaine users in Dayton, Ohio. Participants Crack smokers (n = 430) 18 years or older whose urine tested positive for cocaine metabolites at the baseline interview. Measurements Interviewer-administered and audio computer self-administered, structured questionnaires were used to collect data on a range of variables, including frequency of crack use. Abstinence was defined as not having used crack for at least 6 consecutive months during the study. Findings Three trajectory-based groups were identified: (1) No Change, characterized by a very low probability of abstinence; (2) Some Change, characterized by a low to moderate probability of abstinence; and (3) Dramatic Change, characterized by a high probability of abstinence. African Americans and men were significantly less likely to become abstinent. For the majority of the people (63.6%), crack use was uninterrupted by extended periods of abstinence during the study. Conclusion Crack cocaine use that persists for a decade or longer may well be the norm for a large proportion of people who have experience with the drug.
