Table 4.

Logistic regression analyses

	B	Standard error	Wald	Sig.	Exp (B)	Lower confidence interval (95%)	Upper confidence interval (95%)
Gender	−0.72	0.25	8.25	0.00	0.49	0.30	0.80
Use of opiods	0.36	0.14	6.81	0.01	1.43	1.09	1.88
Sleep problems	0.03	0.01	36.92	0.00	1.03	1.02	1.04
Fatigue	0.04	0.01	18.14	0.00	1.04	1.02	1.06
Constant	−3.99	0.55	52.57	0.00	.02