Problems with analyses and interpretation of data in “use of the KDQOL-36™ for assessment of health-related quality of life among dialysis patients in the United States”

Table 2 Product-moment correlations of the general health item with the KDQOL-36 scales

	In general, how would you rate your health? (Medical Education Institute)	In general, how would you rate your health? (Transplant data)
SF-12 Physical Component Summary	0.56	0.53
SF-12 Mental Component Summary	0.34	0.29
Burden of Kidney Disease	0.35	0.39
Symptom and Problems of Kidney Disease	0.37	0.34
Effects of Kidney Disease	0.34	0.32

ISSN: 1471-2369