Assessment of quality of life in people with severe and enduring anorexia nervosa: a comparison of generic and specific instruments

Table 2 Multiple linear regression models using the SF-12 and EDQOL as predictors of change in functional impairment (predictive validity)

Dependent	Significant predictors	B	SE (B)	β	t	p
*Without Axis I Comorbidity as a covariate*
DOR change: baseline to post-treatment	SF-12 MCS	−0.23	0.11	−0.31	−2.10	0.04
R ² _adj = 0.07
DOR change: baseline to 6-month follow-up	EDQOL Work/School	5.20	2.07	0.40	2.51	0.02
	EDQOL Financial	−4.18	2.12	−0.31	−1.97	0.06
R ² _adj = 0.14
DOR change: baseline to 12-month follow-up	EDQOL Work/School	2.71	1.49	0.29	1.82	0.08
R ² _adj = 0.06
WSAS change: baseline to post-treatment	SF-12 MCS	−0.43	0.10	−0.55	−4.34	<0.001
R ² _adj = 0.28
WSAS change: baseline to 6-month follow-up	SF-12 MCS	−0.38	0.10	−0.51	−3.61	0.001
R ² _adj = 0.24
WSAS change: baseline to 12-month follow-up	SF-12 MCS	−0.33	0.11	−0.44	−3.00	0.01
R ² _adj = 0.17
*With Axis I Comorbidity as a Covariate*
DOR change: baseline to post-treatment	Axis I Comorbidities	6.97	2.62	0.40	2.67	0.01
	EDQOL Financial	−4.29	2.06	−0.31	−2.08	0.04
R ² _adj = 0.14
DOR change: baseline to 6-month follow-up	EDQOL Work/School	4.91	2.33	0.35	2.11	0.04
	EDQOL Financial	−4.36	2.16	−0.34	−2.02	0.05
R ² _adj = 0.12
DOR change: baseline to 12-month follow-up	-	-	-	-	-	-
R ² _adj = 0.00
WSAS change: baseline to post-treatment	SF-12 MCS	−0.41	0.10	−0.52	−3.96	<0.001
R ² _adj = 0.25
WSAS change: baseline to 6-month follow-up	SF-12 MCS	−0.36	0.11	−0.48	−3.23	0.00
R ² _adj = 0.21
WSAS change: baseline to 12-month follow-up	SF-12 MCS	−0.34	0.12	−0.43	−2.85	0.01
R ² _adj = 0.16

R ² _adj = variance in the dependent variable accounted for by the predictor variable(s), adjusting for statistical shrinkage; SF-12 = Medical Outcomes Study Short Form; PCS = Physical Component Summary Scale; EDQOL = Eating Disorders Quality of Life Questionnaire; DOR = days out of role; WSAS = Work and Social Adjustment Scale.

ISSN: 1471-244X