Table 2.

Characteristics of the patients before and after treatment among those who completed treatment (n = 51).

	Before treatment	After treatment
	Mean (SD)	Mean (SD)	T-Test	p	Cohen's d
Weight
Body weight (kg)	54.9 (8.1)	56.4 (6.8)	−2.35	0.039	−0.20
Body mass index centile	39.3 (22.1)	44.1 (20.7)	−2.23	0.051	−0.22
Eating disorder psychopathology
Overall severity (global EDE-Q)	3.5 (1.4)	1.2 (1.4)	9.81	<0.001	1.64
Dietary restraint (EDE-Q subscale)	3.6 (1.6)	1.0 (1.4)	10.09	<0.001	1.73
Eating concern (EDE-Q subscale)	3.2 (1.4)	0.9 (1.3)	9.51	<0.001	1.70
Weight concern (EDE-Q subscale)	3.5 (1.7)	1.3 (1.5)	7.95	<0.001	1.37
Shape concern (EDE-Q subscale)	4.0 (1.8)	1.7 (1.7)	8.25	<0.001	1.31
General psychiatric features, GSI	1.4 (0.8)	0.6 (0.7)	6.60	<0.001	1.13
	N (%)	N (%)	McNemar test or Fisher exact test	p
Global EDE-Q <1 SD above the community meana	13 (25.5)	42 (82.4)	27.03	<0.001
Eating disorder behaviour (EDE-Q)
Objective bulimic episodes ≥1	27 (52.9)	6 (11.8)		<0.001
Self-induced vomiting ≥1	19 (37.3)	3 (5.9)		<0.001
Laxative taking ≥1	7 (13.7)	2 (3.9)		0.289
Absence of all of the above	17 (33.3)	40 (83.3)	17.93	<0.001
Cessation of all of the above, if present at baseline	–	26/34 (76.5)	–	–
	Median (range)	Median (range)	Wilcoxon test	p	r
Objective bulimic episodes (N)	1 (0–84)	0 (0–6)	−3.98	<0.001	0.56
Self-induced vomiting (N)	0 (0–80)	0 (0–4)	−3.63	0.001	0.51
Laxative taking (N)	0 (0–30)	0 (0–15)	−1.40	0.161	0.20

EDE-Q – Eating Disorder Examination-Questionnaire (version 6.0); GSI – Global severity index.

Missing values: at end of treatment there were a further 2 missing values for BMI and 3 missing values for EDE-Q and GSI.

^aGlobal EDE-Q less than 1 SD above community EDE-Q mean for young adult women (i.e., below 2.77).