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Table 2 Mean SF-36 scores by time since diagnosis and disease stage in chronic kidney disease patients (N = 98).

From: Defensive coping and health-related quality of life in chronic kidney disease: a cross-sectional study

SF-36 DIMENSIONSa TIME SINCE DIAGNOSIS Mean(SD) DISEASE STAGE Mean(SD)  
  ≤3 years (N = 21) >3 years (N = 77) Pre-dialysis (N = 79) Dialysis (N = 19) Total (N = 98)
PCSb 51.97(7.06) 45.24(8.18) *** 48.32(7.40) 39.87(8.99) *** 46.68(8.39)
MCSc 45.20(10.15) 47.75(10.54) 47.52(10.25) 45.90(11.48) 47.20(10.46)
Physical functioning 82.61(18.61) 74.67(18.99) * 80.44(15.19) 59.47(24.31) *** 76.37(19.10)
Role/Physical 59.52(42.18) 74.35(36.49) 73.42(35.65) 61.84(46.67) 71.17(38.05)
Bodily pain 94.33(13.53) 71(28.22) *** 79.59(23.63) 61.05(36.76) * 76.00(27.46)
General health 67.95(19.73) 50.53(17.92) *** 57.48(18.92) 40.89(16.77) ** 54.26(19.58)
Vitality 63.33(23.62) 59.87(20.35) 61.77(20.20) 55.78(24.10) 60.61(21.02)
Social functioning 86.90(16.52) 72.07(24.90) ** 77.84(22.37) 64.47(28.34) 75.25(24.07)
Role/Emotional 58.73(37.86) 74.02(36.52) 74.68(34.26) 54.38(44.73) 70.74(37.15)
Mental Health 64.76(18.57) 69.76(20.31) 68.75(19.73) 68.42(21.49) 68.69(19.97)
  1. a Lower scores indicate worse health; bPCS: Physical Component Summary score; cMCS: Mental Component Summary score
  2. *p <.05, **p <.01 and ***p <.001, Mann-Whitney U test for comparisons of ranked scores.