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Table 1 Reliability of the physical functioning, bodily pain, and general health perceptions scales when administered independently on one occasion (A) and within the entire SF-36 on a second occasion (B)

From: Performance of health-status scales when used selectively or within multi-scale questionnaire

Scale (n = 80) Alphaa   Mean (SD)  
  A B ICC (95% CI)b A B Mean difference (95% CI)
Physical functioning 0.89 0.88 0.93 (0.90–0.96) 64.3 (24) 64.8 (24) 0.4 (-1.5–2.4)
Bodily pain 0.87 0.81 0.78 (0.68–0.86) 36.8 (18) 39.4 (20) 2.5 (-.0.3–5.4)
General health perceptions 0.86 0.85 0.87 (0.80–0.91) 58.6 (23) 59.1 (23) 0.5 (-2.2–3.2)
  1. a Cronbach alpha coefficient values range from 0 (no) to 1 (perfect) reliability. b Intraclass correlation coefficient (ICC) values range from 0 (no) to 1 (perfect) reliability. CI, confidence interval