Table 3.

Multiple regression analysis of the effect of prognostic factors on BMI-SDS improvement

Outcome judgment criteria	Prognostic factors	R2	β	SE	t	P
Differences in BMI-SDS	BMI-SDS	0.294	− 0.553	0.109	− 5.094	< 0.001
	ChEAT26		− 0.105	0.124	− 0.846	0.401
	Outcome score		0.184	0.110	1.667	0.101

BMI-SDS body mass index standard deviation score, ChEAT26 Children’s version of the Eating Attitude Test-26 items, Outcome scale Childhood eating disorder outcome scale, R² R Squared, β Beta Coefficient, SE Standard Error, t t-Statistic, P P-Value

Using a model selection procedure, the BMI-SDS was selected, whereas ChEAT26 and outcome scores were excluded. The F value was 25.947, with degrees of freedom (3,58), p < 0.001