Incidence and risk factors of preterm birth in a rural Bangladeshi cohort

BMC Pediatrics

Table 3 Association of women’s antenatal care status and risk of preterm birth

Characteristics	Live births (n = 32,126)	Preterm births (n = 7,161)		RR	95% CI	P value
	Number	Number	Percent (row)
ANC visits
No ANC visit	13732	3568	26.0	Ref.	-
At least one ANC	18394	3593	19.5	0.75	0.72 – 0.78	<0.001
Iron (tablet) consumption
No Iron consumed	3231	646	20.0	Ref.	-
Consumed for less than 60 days	4307	1007	23.4	1.17	1.07 – 1.28	<0.001
Consumed for 60 – 180 days	23520	5307	22.6	1.12	1.05 – 1.21	<0.005
Consumed for 181 days or more	1068	201	18.8	0.94	0.82 – 1.08	>0.40
Birth preparedness status
Didn’t practice at all	3011	1799	59.7	Ref.	-
Practiced partially	18838	3509	18.6	0.31	0.30 – 0.32	<0.001
Practiced fully	10277	1853	18.0	0.30	0.29 – 0.32	<0.001
Any dose of TT immunization during pregnancy
Yes	25536	5562	21.8	0.90	0.86 – 0.94	<0.001
No	6590	1599	24.3	Ref.	-
Mid-upper arm circumference (MUAC)
<214 mm	6068	1580	26.0	1.56	1.45 – 1.67	<0.001
214 – 221 mm	5311	1309	24.6	1.47	1.37 – 1.59	<0.001
222 – 250 mm	15072	3324	22.1	1.32	1.24 – 1.41	<0.001
> = 251 mm	5675	948	16.7	Ref.	-
Any reported antenatal complication^*
Yes	499	129	25.9	1.16	1.02 – 1.35	<0.05
No	31627	7032	22.2	Ref.	-

^*History of fever (or as measured by CHW), vaginal bleeding, swelling of hand, leg or face, severe abdominal pain, convulsion, severe headache, blurring of vision during pregnancy.

ISSN: 1471-2431