Table 4.

Advanced analysis of the risk factors associated with insomnia in pregnant women*.

Risk factors for insomnia	β	SEa	dfb	P	ORc	95% Cld
Gestational trimester
1st	(Reference)
2nd	0.257	0.327		0.432	1.29	0.681–2.456
3rd	0.711	0.306	2	0.020	2.03	1.117–3.708
Age
<20	(Reference)
≥20	0.775	0.235	1	0.001	2.17	1.370–3.442
&BDI score
<17	(Reference)
≥17	0.969	0.228	1	0.000	2.63	1.684–4.121

*Backward stepwise logistic regression.

^&BDI: Beck Depression Inventory.

SE^a: standard error; df^b: degree of freedom; OR^c: odd's ratio; Cl^d: confidence interval.