Cognitive behaviour therapy response and dropout rate across purging and nonpurging bulimia nervosa and binge eating disorder: DSM-5 implications

Table 1 Socio-demographic and information regarding eating disorders (n = 454)

		Descriptives			Factor		¹Contrasts: mean difference (MD) or OR
		BN-P	BN-NP	BED	Group		BN-NP vs BN-P		BED vs BN-P		BED vs BN-NP
		(n = 327)	(n = 40)	(n = 87)	F or χ²	p	MD or OR	p	MD or OR	p	MD or OR	p
Body Mass Index (current); mean (SD)		24.3 (5.2)	26.4 (5.6)	35.9 (5.6)	134.5	<.001	2.07	.086	11.5*	.001	9.46*	001
Body Mass Index (Maximum); mean (SD)		27.4 (5.6)	28.0 (5.5)	37.3 (5.5)	89.04	<.001	0.61	.823	9.88*	.001	9.27*	.001
Body Mass Index (Minimum); mean (SD)		19.8 (2.9)	20.2 (2.7)	23.8 (3.9)	44.73	<.001	0.39	.790	3.99*	.001	3.61*	.001
Number of previous treatments; mean (SD)		0.72 (0.9)	0.63 (0.7)	0.48 (0.9)	2.401	.092
Motivation to treatment	Own motivation	55.4%	60.0%	55.6%	14.95	.060
	Derivation	26.0%	35.0%	37.0%
	Pressures	18.6%	5.0%	7.4%
Civil status; %	Single or separated	81.8%	80.0%	53.7%	38.48	<.001	1.12	.787	3.87*	.001	3.45*	.001
	Married-couple	18.2%	20.0%	46.3%
Employment status; %	Employed	82.5%	86.1%	80.0%	0.657	.720
Age (years-old); mean (SD)		26.2 (6.9)	27.2 (9.1)	34.1 (9.6)	35.27	<.001	1.04	.721	7.91*	.001	6.87*	.001
Onset of ED (years-old); mean (SD)		19.3 (6.3)	19.8 (8.9)	23.2 (11.0)	7.352	.001	0.45	.947	3.88*	.001	3.43*	.042
Length of ED (years); mean (SD)		7.5 (5.7)	7.0 (5.4)	10.6 (8.1)	7.809	<.001	0.55	.883	3.10*	.001	3.66*	.016

¹Mean difference for quantitative variables and odds ratio for categorical, for significant comparisons. P-values in the table include Bonferroni-Holm’s correction.

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