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

Likelihood-based item-fit 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 Arch into very best practices. We've currently begun to find out this 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. QDIS-7 consistently had higher correlations with other disease-specific measures than with generic physical (r = -0.43 to -0.69, median = -0.52) and mental (r = -0.38 to -0.51, median = -0.44) summary measures.Responsivenessdisease-specific measure, was replicated across pre-ID groups analyzed separately with one exception (equivalent QDIS and generic SF-8 PCS RV estimates for OA).NormsIn longitudinal analyses, 59.4 reported the same preID disease status at 9-month follow-up and those who changed were more likely better (24.6 ) than worse (16.0 ).), CKD (N = 261), cardiovascular (N = 578), diabetes (N = 857) and respiratory groups (N = 1156) d Intraclass correlation coefficient (ICC(3,1)) for arthritis (N = 109), CKD (N = 37), cardiovascular (N = 63), diabetes (N = 75) and respiratory groups (N = 92)Ware et al.