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Table 3 Multiple linear regression coefficient estimates for the patients' 15D score at admission

From: Health-related quality of life in patients waiting for major joint replacement. A comparison between patients and population controls

Explanatory variables β a 95% CI for β P value
Waiting time    
   0–3 months Reference   
   > 3–6 months 0.013 -0.016, 0.043 0.381
   > 6 months 0.017 -0.014, 0.047 0.286
BMI -0.003 -0.005, -0.0004 0.020
Affected joint (0 = hip, 1 = knee) 0.013 -0.009, 0.035 0.232
15D score at baseline 0.752 0.637, 0.867 <0.001
Gender (0 = female, 1 = male) -0.008 -0.032, 0.015 0.479
Age -0.0004 -0.002, 0.001 0.539
Professional education (0 = no, 1 = yes) -0.0003 -0.023, 0.022 0.976
Housing (0 = living alone, 1 = living with someone) 0.009 -0.016, 0.034 0.469
Constant 0.301   
R square 0.613   
F 21.430***   
n 133   
  1. A positive value indicates improvement in the 15D score, and a negative value indicates worsening.
  2. a multivariate unstandardised linear regression coefficient
  3. *** P < 0.001