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Table 3 Descriptive statistics of the transformed SF-36v2 scale scores and normed summary scores (N = 1884)

From: Performance of the Dutch SF-36 version 2 as a measure of health-related quality of life in patients with rheumatoid arthritis

Scales Range a Mean Median SD Skewness Kurtosis Floor (%)b Ceiling (%)c
PF 0 to 100 64.55 70.00 26.06 −0.53 −0.72 1.1 6.4
RP 0 to 100 57.92 50.00 27.44 −0.02 −0.83 2.5 15.5
BP 0 to 100 61.01 62.00 21.83 −0.09 −0.43 0.5 9.4
GH 0 to 100 54.61 52.00 19.60 0.03 −0.39 0.1 1.1
VT 0 to 100 57.96 56.25 19.54 −0.08 −0.43 0.1 2.1
SF 0 to 100 77.62 87.50 22.76 −0.85 0.07 0.5 35.8
RE 0 to 100 72.98 75.00 27.15 −0.68 −0.50 1.6 37.0
MH 0 to 100 75.92 80.00 17.92 −0.88 0.60 0.1 9.3
PCS d 6 to 65 41.15 41.43 9.85 −0.24 −0.43 - -
MCS d 9 to 77 50.06 52.45 10.68 −0.79 0.26 - -
  1. aObserved scores; bPercentage of respondents with worst possible score; cPercentage of respondents with best possible score; dThe component summary scores are standardized using normative data from the 1998 US general population with a mean score of 50 and an SD of 10. PF, Physical functioning; RP, Role-physical; BP, Bodily pain; GH, General health; VT, Vitality; SF, Social functioning; RE, Role-emotional; MH, Mental health; HT, Health transition; PCS, Physical component summary; MCS, Mental component summary.