TABLE 3.

Binary logistic regression analysis of risk factors for insomnia.

Predictor variables	B	SE	OR (95% CI)	P	VIF
Calcium (mmol/L)	1.285	0.640	3.613 (1.031–12.661)	0.045	1.003
Pruritus	0.732	0.297	2.078 (1.161–3.721)	0.014	1.005
Constipation	1.059	0.423	2.882 (1.26–6.601)	0.012	1.004

Hosmer-Lemeshow Test: χ² = 5.77, p = 0.673.