. Author manuscript; available in PMC: 2010 Jul 27.

Published in final edited form as: Am J Gastroenterol. 2010 Feb 16;105(4):842–847. doi: 10.1038/ajg.2010.48

Table 3.

Associations between sleep quality and IBS stratified by shift status

	Day shift			Night shift			Rotating shift
	No IBS (n=147)	IBS (n=67)	P value	No IBS (n=66)	IBS (n =44)	P value	No IBS (n=39)	IBS (n=36)	P value
“I feel sleepy during the day and struggle to remain alert”	22.2% (32)	52.4% (33)	<0.0001	37.5% (24)	79.1% (34)	<0.0001	22.2% (8)	55.6% (20)	0.003

“Generally I sleep badly”	30.0% (40)	51.6% (33)	0.001	20.3% (13)	51.2% (22)	<0.001	16.7% (6)	47.2% (17)	0.005

“I have difficulty falling asleep”	34.5% (50)	50.8% (32)	0.03	26.6% (17)	58.4% (25)	0.001	30.4% (17)	68.8% (11)	0.005

IBS, irritable bowel syndrome.