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Table 2 Central tendency, variability and reliability of the SF-36 subscales

From: Predictors of health-related quality of life in type II diabetic patients in Greece

  No. of Items % N Valid Mean (SD) 95% CI Median Floor (%) Ceiling (%) Reliability1
Scales         
Physical functioning 10 99.6 64.5 (29.5) 60.7–68.4 75.0 0.4 9.2 0.94
Role physical 4 99.6 62.0 (45.8) 56.0–67.9 100.0 30.7 55.7 0.96
Bodily pain 2 99.6 73.0 (30.5) 69.0–76.9 84.0 2.6 46.1 0.92
General health 5 99.1 48.9 (23.0) 45.9–51.9 47.0 1.8 0.4 0.76
Vitality 4 99.6 56.9 (27.4) 53.0–60.2 60.0 2.6 4.4 0.88
Social functioning 2 98.7 74.8 (29.7) 70.9–78.7 87.5 2.2 44.2 0.84
Role emotional 3 99.6 63.6 (45.0) 57.7–69.5 100.0 29.8 56.6 0.93
Mental health 5 98.7 60.1 (26.3) 56.7–63.5 64.0 0.9 1.3 0.85
  1. 1Measured with Cronbach's alpha coefficient