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 4 Difference in daily functioning and treatment adherence between patients with and without significant cognitive complaints

	Based on original KDQOL-CF		t-test		Based on extended KDQOL-CF		t-test
	SCCs (N = 16)	No SCC (N = 252)	t-test		SCCs (N = 147)	No SCC (N = 121)	t-test
	Means (SD)		p value	Cohen’s d	Means (SD)		p value	Cohen’s d
WSAS	15.50 (10.92)	5.56 (7.94)	0.002**	1.22	9.62 (9.40)	1.95 (4.37)	< 0.001***	1.02
MARS-5	8.94 (2.93)	7.19 (2.76)	0.015*	0.63	7.90 (3.10)	6.55 (2.17)	< 0.001***	0.50
DDFQ-1	3.47 (5.01)	2.60 (3.86)	0.408	0.22	3.15 (4.19)	2.08 (3.55)	0.030*	0.27
DDFQ-2	1.00 (1.03)	0.99 (0.93)	0.973	0.01	1.10 (0.88)	0.87 (0.97)	0.045*	0.25
DDFQ-3	4.94 (5.07)	2.51 (3.88)	0.078	0.62	3.44 (4.50)	1.75 (3.09)	< 0.001***	0.43
DDFQ-4	1.31 (1.14)	1.01 (0.94)	0.316	0.32	1.20 (0.94)	0.82 (0.92)	< 0.001***	0.42
* p < .050. p < .010. * p < .001.

Notes. KDQOL-CF = Kidney Disease Quality of Life Cognitive Function subscale. SCC = Subjective Cognitive Complaint. N = Group size. SD = Standard Deviation. WSAS = Work and Social Adjustment Scale. MARS = Medication Adherence Report Scale. DDFQ = Dialysis Diet and Fluid non-adherence Questionnaire. DDFQ-1 = number of days in the past two weeks during which patients did not follow diet guidelines. DDFQ-2 = the extent to which patients deviated from diet guidelines. DDFQ-3 = number of days in the past two weeks during which patients did not follow fluid guidelines. DDFQ-4 = the extent to which patients deviated from fluid guidelines

ISSN: 1471-2369