. Author manuscript; available in PMC: 2011 Jan 1.

Published in final edited form as: Int J Eat Disord. 2010 Jan;43(1):14–21. doi: 10.1002/eat.20670

Table 4.

Prevalence of Alcohol and Drug Use by Purging Status and Odds Ratios with 95% Confidence Intervals.

	No Purging Behavior n = 335 n (%)	Purging Behavior n = 386 n (%)	χ² (p-value) df = 1	Odds Ratio (95% CI)
Alcohol Use			9.70 (.002)
No Abuse/dependence	287 (85.7)	290 (75.1)		-----
Abuse/dependence	48 (14.3)	96 (24.9)		1.83 (1.24, 2.70)
Drug Use			32.25 (<.001)
No use/experimenters	238 (70.6)	199 (51.2)		-----
Use	77 (22.9)	112 (28.8)		1.67^* (1.18, 2.37)
Abuse/dependence	22 (6.5)	78 (20.0)		3.79^* (2.26, 6.35)

Comparisons are made with respect to the No use/experimenters group.

Note. Dashes indicate reference group.