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

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

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
  1. 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.