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. Author manuscript; available in PMC: 2016 Mar 16.

Published in final edited form as: Subst Use Misuse. 2016 Jan 20;51(2):261–267. doi: 10.3109/10826084.2015.1082594

Table 2.

Odds ratios and 95% confidence intervals for predictors of prison drug use during previous six months of incarceration.

Prison time
	Less than 12 months	1.00	Reference (CI)
	More than 12 months	0.55	0.28	1.09
Gender
	Women	1.00	Reference (CI)
	Men	2.14	1.03	4.46
Age
	18–30	1.00	Reference (CI)
	31–45	0.40	0.19	0.86
	46–89	0.30	0.11	0.83
Yard
	No	1.00	Reference (CI)
	Yes	1.67	0.80	3.50
Heroin use history^a
	No	1.00	Reference (CI)
	Yes	2.75	1.19	6.38
Crack use history^a
	No	1.00	Reference (CI)
	Yes	2.09	0.86	4.91

^a

These drugs were reportedly used prior to incarceration.