Table 5.
Comparison of mean scores and validity statistics by self-evaluated severity of kidney disease symptomsa
| Measure | Mean (SD) Score | F Statistic | η2b | RV (95% CI) | |||
|---|---|---|---|---|---|---|---|
| Not Notable, n=148 | Mild, n=120 | Moderate, n=131 | Severe, n=50 | ||||
| KDQOL-36 | |||||||
| Burden (+) | 81.6 (22.9) | 63.8 (23.1) | 48.0 (25.7) | 31.6 (25.2) | 74.5c | 0.33 | 1.0 |
| Effects (+) | 86.9 (13.2) | 75.9 (17.4) | 61.6 (21.6) | 52.8 (23.7) | 66.2c | 0.31 | 0.89 (0.65 to 1.21) |
| Symptoms (+) | 86.1 (10.8) | 79.4 (12.5) | 68.0 (16.0) | 62.5 (18.3) | 58.6c | 0.28 | 0.79 (0.53 to 1.16) |
| CKD-QOL | |||||||
| CKD-QOL-6 (−) | 40.0 (5.3) | 45.6 (6.4) | 52.9 (7.7) | 56.5 (8.4) | 123.0c | 0.45 | 1.65 (1.24 to 2.21)d |
| CKD-QOL-CAT (−) | 37.8 (7.2) | 45.9 (7.3) | 53.0 (7.7) | 56.3 (6.3) | 136.2c | 0.48 | 1.83 (1.36 to 2.45)d |
| Three- or six-item CAT (−) | 38.6 (6.2) | 45.9 (7.5) | 53.2 (8.0) | 56.5 (6.5) | 131.7c | 0.47 | 1.77 1.29 to 2.39)d |
| SF-12v2 | |||||||
| PCS (+) | 46.6 (9.7) | 42.6 (9.8) | 35.1 (9.9) | 32.5 (9.7) | 45.1c | 0.23 | 0.61 (0.37 to 0.95)d |
| MCS (+) | 53.8 (9.1) | 50.7 (10.1) | 47.6 (9.8) | 46.1 (11.8) | 12.6c | 0.08 | 0.17 (0.07 to 0.31)d |
Means are unadjusted. 95% CI, 95% confidence interval.
a
Self-reported response to “How would you rate the severity of your kidney disease symptoms in the past 4 weeks?”: not noticeable, mild, moderate, severe/very severe.
b
η2 estimate of variance explained by groups (see text); significance is same as F ratio.
c
P<0.001 (see text).
d
P<0.05 (see text).