TABLE 4.

Multi-factor logistic regression analysis of CFS.

	Variables	β	S. E.	Wald χ2	P	OR	95% CI
Study	1–2 h	−0.624	0.30	4.47	0.035	0.535	0.300	0.956
	2–4 h	−1.091	0.35	9.74	0.002	0.336	0.169	0.666
	>4 h	−0.176	0.29	0.40	0.527	0.839	0.486	1.447
Overnight	Sometimes	0.061	0.23	0.07	0.787	1.063	0.683	1.654
	Often	0.881	0.33	7.34	0.007	2.414	1.276	4.567
Overeating		0.409	0.20	4.09	0.043	1.504	1.013	2.235
SAS		0.702	0.21	11.32	0.001	2.017	1.340	3.036
PSQI		1.671	0.22	59.89	<0.001	5.318	3.482	8.122