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Table 3 Baseline characteristics of the TKR Surgery and Rheumatology Clinic patients from the OA Knee study.

From: The use of bootstrap methods for analysing health-related quality of life outcomes (particularly the SF-36)

  Rheumatology Surgical   95% CI  
  N Mean SD N Mean SD Mean Diff Lower Upper P-value
Age (years) 102 64.2 (11.3) 109 71.1 (8.5) -6.9 -9.6 -4.2 0.001
SF-36 Dimensions           
Physical Function 97 28.2 (22.4) 95 21.2 (18.2) 7.0 1.2 12.8 0.019
Role Physical 96 11.5 (22.0) 99 12.9 (26.3) -1.4 -8.3 5.4 0.684
Bodily Pain 100 32.0 (19.5) 104 36.3 (23.4) -4.3 -10.3 1.6 0.154
General Health 94 43.9 (22.9) 96 57.3 (23.8) -13.3 -20.0 -6.6 0.001
Vitality 98 36.9 (19.0) 99 42.3 (19.3) -5.4 -10.8 0.0 0.050
Social Function 100 53.1 (30.6) 101 53.6 (27.6) -0.5 -8.6 7.6 0.910
Role Emotional 95 41.1 (44.2) 99 44.1 (44.6) -3.1 -15.6 9.5 0.632
Mental Health 99 62.7 (20.9) 100 68.2 (18.8) -5.5 -11.0 0.1 0.054
Gender           
Female 71   (69.6%) 59   (54.1%) (15.5%) (2.4%) (27.8%) 0.021†
Male 31   (30.4%) 50   (45.9%)     
Total 102   (100%) 109   (100%)     
  1. P-values from two independent samples t-test except (†) χ2 test.