. Author manuscript; available in PMC: 2011 Feb 9.

Published in final edited form as: Am J Psychiatry. 2005 Dec;162(12):2249–2255. doi: 10.1176/appi.ajp.162.12.2249

TABLE 4.

Cox Regression and Discriminant Function Analyses of the Relationship Between Items on the Eating Disorder Examination Questionnaire and the Development of Eating Disorders

	Cox Regression Analyses^a
	Sample Estimates		Jackknifed Estimates		Discriminant Function Analysis
Item and Optimal Cut Point	Hazard Ratio	95% CI	Hazard Ratio	95% CI	Variable Loading	Standardized Coefficient
Objective bulimia (≥3 episodes/28 days)	2.29^**	1.40–3.75	2.24^**	1.26–3.97	0.532	0.416
Purging (≥2 episodes/28 days)	3.60^***	1.63–5.43	3.23	0.96–10.86	0.534	0.498
Low body mass index (<19 kg/m²)	2.59^**	1.50–4.47	2.59^**	1.35–4.96	0.391	0.394
Secret eating (≥13 instances/28 days)	2.97^***	1.63–5.43	2.92^**	1.43–5.99	0.543	0.410
Fear of losing control over eating (≥23 instances/28 days)	1.77^*	1.05–2.98	1.70	0.88–3.26	0.447	0.305
Desire to have an empty stomach (≥16 instances/28 days)	1.63^*	1.02–2.61	1.67	0.98–2.83	—	—

Data are presented for dichotomous independent variables; the results were similar for undichotomized variables.

p<0.05

^**

p<0.01

^***

p<0.001.