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Table 3 Multiple linear regression model of health quality in PSS patients and controls

From: Primary Sjögren's Syndrome: health experiences and predictors of health quality among patients in the United States

  SF-36 Domain Dependent Variable
Predictor Physical Functioning Emotional Well-Being General Health
  R 2 β SE R 2 β SE R 2 β SE
PhysR-PSS Patients ( n = 201):          
Sicca severity (domain from SSI) 0.01 0.09 0.32 0.00 0.03 0.19 0.00 -0.06 0.23
Somatic fatigue (domain from PROFAD-SSI) 0.07 -0.52*** 1.44 0.01 -0.17 0.87 0.08 -0.54*** 1.05
Mental fatigue (domain from PROFAD-SSI) 0.00 -0.03 1.34 0.00 -0.03 0.81 0.00 -0.03 0.98
Depression (CES-D) 0.00 0.01 0.19 0.25 -0.72*** 0.11 0.01 -0.12 0.14
Pain severity (domain from BPI) 0.04 -0.28*** 0.83 0.02 0.18** 0.50 0.00 -0.07 0.60
Age 0.05 -0.25*** 0.13 0.00 0.05 0.08 0.01 0.09 0.10
Duration of disease 0.00 -0.04 0.20 0.00 0.04 0.12 0.00 -0.02 0.14
Controls ( n = 498):          
Sicca severity (domain from SSI) 0.00 0.09* 0.28 0.00 -0.01 0.18 0.01 -0.10* 0.24
Somatic fatigue (domain from PROFAD-SSI) 0.05 -0.37*** 0.98 0.00 0.00 0.63 0.08 -0.46*** 0.85
Mental fatigue (domain from PROFAD-SSI) 0.00 0.08 0.90 0.00 -0.07 0.58 0.01 0.13* 0.79
Depression (CES-D) 0.00 0.01 0.12 0.25 -0.65*** 0.08 0.01 -0.13** 0.10
Pain severity (domain from BPI) 0.08 -0.35*** 0.52 0.00 -0.02 0.34 0.01 -0.15*** 0.46
Age 0.11 -0.34*** 0.06 0.04 0.19*** 0.04 0.00 -0.05 0.05
  1. Note: The R-square values for the individual predictors are the incremental R-squares.
  2. Note: All coefficients marked with one or more asterisks are significant by a two-tailed t-test.
  3. * p < .05; ** p < .01; *** p < .001.