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Table 4 Percentage of variation of the SF-36 scores explained by each measure of multimorbidity

From: Comparative assessment of three different indices of multimorbidity for studies on health-related quality of life

HRQOL (SF-36) Percentage of variation explained by the control variables† Partial R2(%)‡
Physical Health   CIRS§ FCI Charlson
   Physical Functioning 21.08** 15.59** 9.53** 4.52**
   Role physical 7.84** 11.14** 5.21** 0.56
   Bodily Pain 10.02** 9.91** 6.80** 1.04
   General Health 11.63** 14.07** 7.96** 2.99**
Mental Health     
   Vitality 10.68** 6.78** 2.56* 0.10
   Social Functioning 10.77** 6.72** 2.94** 0.002
   Role Emotional 6.71** 2.64* 0.43 0.52
   Mental Health 17.07*** 2.26* 1.02 1.18
Physical Component Summary 13.18** 17.75** 11.81** 5.46**
Mental Component Summary 12.60** 0.75 0.02 2.80
  1. SF-36 = Self-administered 36-item short form of the Medical Outcomes Study questionnaire.
  2. † control variables: age, gender, self-perceived social support and self-perceived economical status
  3. ‡ controlling for age, gender, self-perceived social support and self-perceived economical status.
  4. §CIRS = Cumulative Illness Rating Scale; FCI = Functional Comorbidity Index; Charlson = Charlson index.
  5. * p < 0.05 ; ** p < 0.01