Screening for cognitive symptoms in dialysis patients with an extended version of Kidney Disease Quality of Life Cognitive Function subscale (KDQOL-CF): a validation study

Table 2 Internal consistency of the extended kidney disease quality of life cognitive function subscale

KDQOL-CF items	Cronbach’s alpha if item deleted	Corrected item-scale correlations	Inter-item correlations
KDQOL-CF items	Cronbach’s alpha if item deleted	Corrected item-scale correlations	1	2	3	4
1. Slow reaction time	0.75	0.61	-
2. Concentration difficulty	0.69	0.72	0.60	-
3. Confusion	0.75	0.59	0.45	0.61	-
4. Memory difficulty	0.78	0.53	0.44	0.49	0.40	-

Notes. All correlations reported in this table were statistically significant. KDQOL-CF = Kidney Disease Quality of Life Cognitive Function subscale

ISSN: 1471-2369