Table 3.

Sleep History Questionnaire

	ESRD	Control	p value
History of snoring, %	80	98	< 0.001
Witnessed apnea, %	32	58	< 0.001
Nocturnal choking sensation, %	34	36	NS
Daytime sleepiness, %	47	44	NS
Restless sleep, %	45	49	NS
Unrefreshing sleep, %	55	73	0.002
Morning headaches, %	15	27	0.022
Memory impairment, %	51	49	NS

ESRD = end-stage renal disease. Data are percentage within each group.