Table 6.

Comparison of mean change scores and validity statistics by clinician assessment of 3-month change in CKD status

MeasureMean (SD) Change ScoreF Statisticη2aRVb
Better, n=28Same, n=53Worse, n=14
KDQOL-36
 Burden (+)2.68 (19.2)−4.24 (21,3)−12.64 (25.4)2.480.051.00
 Effects (+)2.71 (17.6)1.54 (10.1)−2.00 (8.00)0.670.010.27
 Symptoms (+)2.26 (10.8)0.83 (8.3)−4.40 (10.2)2.440.050.98
CKD-QOL
 CKD-QOL-6 (−)−0.40 (5.5)1.05 (4.5)3.40 (4.9)2.840.061.14
 CKD-QOL-CAT (−)−1.40 (6.1)1.07 (4.7)4.90 (5.6)6.65c0.132.68
 Three- or six-item CAT (−)−1.69 (6.6)0.97 (4.8)4.92 (4.8)7.17c0.142.89
SF-12v2
 PCS (+)−0.15 (7.1)0.52 (5.6)−7.55 (7.7)9.11c0.163.67
 MCS (+)−1.06 (5.9)−1.08 (7.7)−5.10 (7.8)3.39d0.071.37
  • Means are unadjusted.

  • a η2 estimate of variance explained by groups (see text); significance is same as F ratio.

  • b Very small samples and other factors precluded estimation of useful confidence intervals using the bootstrap method.

  • c P<0.01 (see text).

  • d P<0.05 (see text).