Table 3.

Binary logistic regression model on factors associated with the presence of purging behaviors.

Variables	B	S.E.	Wald	p	OR	95% CI for OR
Number of cigarettes/day	0.062	0.078	0.629	0.428	1.064	0.913–1.240
Age at onset	0.143	0.076	3.522	0.061	1.153	0.994–1.339
DUI (months)	0.021	0.016	1.792	0.181	1.021	0.990–1.053
BMI	−0.127	0.060	4.467	0.035	0.881	0.783–0.991

Legend: Presence versus absence of purging episodes was considered as the dependent variable. B = regression coefficient; CI = confidence interval; DUI = duration of untreated illness; OR = odds ratio; S.E. = standard error of B; Wald = Wald statistics. In bold, statistically significant p-value (≤0.05).