Risk factors for pre-term birth in Iraq: a case-control study

Table 2 Distribution of cases and controls according to socio-economic background

Variables	Cases (no.)	Controls (no.)	OR	95% CI	P value
1. Frequency of meat consumption
occasional moderate-high	121 79	64 136	3.62	2.16–4.92	<0.001
2. Manual work
heavy usual	140 60	91 109	2.80	1.86–4.23	<0.001
3. Socio-economic status
low	165	129	2.60	1.63–4.15	<0.001
moderate-high	35	71
4. Occupation
housewife	198	196	2.02	0.37–11.16	N.S
worker	2	4
5. Level of education
illiterate	128	80	2.67	1.78–4.00	<0.001
6 years	65	103	0.45	0.30–0.68	<0.001
>6 years	7	17	1.00	-	-
6. Presence of domestic animal
present	60	16	4.93	2.72–8.93	<0.001
absent	140	184
7. Housing
inadequate	17	10	1.77	0.79–3.97	NS
adequate	183	190

ISSN: 1471-2393