), CKD (N = 261), cardiovascular (N = 578), diabetes (N = 857) and respiratory groups (N = 1156) d

For instance, in 2003, one of several status at 9-month follow-up and those who Ind a smaller group who seems to randomly cooperate virtually everywhere changed were more likely better (24.6 ) than worse (16.0 ). Table 7 compares mean changes in QDIS and physical and mental scores across five groups reporting different disease-specific outcomes. In support of the hypothesis that disease-specific QDIS measures are more responsive than generic title= jir.2012.0142 measures, Table 7 shows a much higher F-ratio (F = 29.8, p title= j.cub.2015.05.021 QDIS-7 and generic measures in discriminating across severity levels, five disease groupsDisease/ Measure Arthritis QDIS-7d SF-8 PCSe SF-8 MCS CKD QDIS-7 SF-8 PCS SF-8 MCS Cardiovascular QDIS-7 SF-8 PCS SF-8 MCS Diabetes QDIS-7 SF-8 PCS SF-8 MCS Respiratory QDIS-7 SF-8 PCS SF-8 MCSeMean (SD) by Self-Evaluated Severitya Mild (N = 688) 49.2 (6.88) 48.1 (7.60) 51.8 (8.08) (N = 189) 44.7 (6.96) 42.2 (11.10) 50.4 (9.43) (n = 469) 48.5 (8.83) 41.8 (10.25) 49.8 (9.70) (N = 870) 45.3 (6.42) 48.4 (8.76) 51.9 (8.08) (N = 1106) 44.7 (7.10) 48.1 (9.46) 49.5 (9.34) Moderate (N = 564) 57.4 (5.83) 40.9 (8.65) 48.8 (10.19) (N = 56) 53.3 (7.72) 37.3 (10.61) 45.6 (11.82) (n = 107) 58.9 (6.66) 34.2 (8.55) 46.5 (10.70) (N = 317) 51.5 (7.21) 44.4 (9.93) 48.4 (9.75) (N = 297) 56.4 (6.71) 41.4 (10.20) 46.4 (11.65) Severe (N = 214) 64.9 (5.81) 31.2 (8.22) 44.7 (11.40) (N = 33) 61.3 (8.40) 33.3 (7.50) 44.4 (11.33) (n = 35) 65.6 (5.60) 30.4 (7.21) 39.1 (12.74) (N = 58) 59.0 (5.85) 40.6 (11.03) 42.6 (11.49) (N = 109) 64.3 (7.07) 33.4 (10.84) 42.2 (12.06)F-ratioRVb95 CIc586.27 383.73 49.1.00 0.65 0.08 (0.56,0.76) (0.05,0.12)87.99 12.41 8.1.00 0.14 0.09 (0.06,0.26) (0.02,0.20)123.29 43.32 21.1.00 0.35 0.17 (0.24,0.50) (0.07,0.30)196.01 36.59 44.1.00 0.19 0.23 (0.11,0.28) (0.13,0.34)622.23 149.30 32.1.00 0.24 0.05 (0.18,0.30) (0.03,0.08)Abbreviations: CKD chronic kidney disease a Severity defined as Mild (None, Mild), Moderate, or Severe (Severe, Very Severe) in response to item How would you rate the severity of your in the past 4 weeks? b Relative validity (RV) is computed as the ratio of the comparator F-statistic over the QDIS-7 F-statistic c Comparator confidence intervals (CI) estimated using bootstrap d QDIS-7 scored so a higher score equals worse health e Norm-based scoring of SF-8 Health Survey summary measures based on a representative probability sample of the US general household population surveyed in 2011, norms (mean = 50, SD = 10) scored so a higher score equals better healthratings within all five disease groups.