Table 6.

Correlations of QDIS-7 with disease-specific and generic measures, five disease groups

Disease	N	Disease-specific severitya	Disease-specific QOLb	Generic Physicalc	Generic Mentalc
Arthritis	925	0.72	0.71	−0.69	−0.44
CKD	240	0.66	0.83	−0.44	−0.43
Cardiovascular	542	0.65	0.72, 0.79	−0.52	−0.51
Diabetes	695	0.54	0.72, 0.72	−0.43	−0.49
Respiratory	848	0.74	0.83	−0.58	−0.38

QDIS-7 scored so a higher score equals worse health

Abbreviations: CKD chronic kidney disease

^aSelf-rating of disease severity (5 categories, None-Very Severe)

^bDisease-specific QOL measures are Arthritis: Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC®) Total scale [6]; CKD: Kidney-Disease Quality of Life 36-item instrument (KDQOL-36™) Burden scale [11]; Cardiovascular: Angina/MI-Seattle Angina Questionnaire Quality of Life scale [38] (first entry N = 275) and CHF-Minnesota Living with Heart Failure® Questionnaire total scale [39] (second entry, N = 267); Diabetes: Problem Areas in Diabetes Scale total scale [41] (first entry) and Diabetes Quality of Life measure total scale [40] (second entry); Respiratory: St. George’s Respiratory Questionnaire total scale [7]. All disease-specific measures are scored so a higher score equals worse health

^cSF-8 Health Survey physical and mental component summary measures scored so a higher score equals better health