Table 1. The impact of associated risk factors (age, education, occupation and income) on pregnant women with constipation.

Associated factors		Prevalence (%)	OR	95%CI of OR	P
Age (years)	<25	1.22	1.000
	25~34	8.22	1.744	1.227–2.478	0.002
	35~45	22.49	3.010	2.224–4.076	0.000
Education	Junior or lower	4.85	1.000
	Senior	4.24	0.918	0.630–1.338	0.656
	Tertiary	13.44	2.126	1.146–3.942	0.015
	Higher	27.22	5.150	2.213–11.989	0.000
Occupation	Business	28.55	1.000
	Service industry	5.59	0.801	0.537–1.193	0.641
	Farming and technology	1.68	0.482	0.286–0.811	0.011
BMI	<18.5	4.16	1.000
	18.5~24	6.65	1.373	0.939–2.008	0.101
	>24	27.34	3.265	1.387–7.683	0.004