Table 7.

Evaluation of risk factors for irritable bowel syndrome by multivariate logistic regression analysis.

Variables	β	Standard error	Wald	Odds ratio	95% CI		P value
					Lower	Upper
Sex	0.649	0.205	10.026	1.914	1.281	2.860	0.002
PSQI	0.134	0.032	17.934	1.143	1.074	1.216	<0.001

CI: confidence interval.