Table 3. Predictors of an Impaired transplacental transfer among pregnant women from Siaya cohort (univariant analysis).

		Transplacental transfer efficiency (Siaya)				Chi2				Odds ratio
Characteristic	Category	Normal		Impaired		P value	OR	Odds Ratio (95%CI)		P value
		n(111)	%	n(89)	%			LCL	UCL
Maternal age (yrs)	15-19	2	1.82	1	1.12
	20-29	83	74.77	58	65.17
	30-39	25	22.52	26	29.21	0.068
	40-49	0	0.00	4	4.49
Gestational age at delivery	<33 weeks	0	0.00	2	2.25
	34-37 weeks	22	19.82	22	24.72	0.186
	38-42 weeks	88	80.18	65	73.03
Birthweight
	Underweight (<2.5kgs)	3	2.70	9	10.11
	Normal	108	97.30	80	89.89	0.028	4.05	1.06	15.40	0.041
Gravida
	1-2	27	24.32	14	15.73		Ref
	3-5	72	64.86	55	61.80	0.049	0.67	0.33	1.42	0.301
	6-9	12	10.81	20	22.47		0.31	0.12	0.82	0.018
Occupation
	Farmer	2	1.80	11	12.36		Ref
	Business woman	37	33.33	22	24.72		9.25	1.87	45.65	0.006
	Housewife	50	45.05	42	47.19	0.031	6.55	1.37	31.21	0.018
	Salaried worker	10	9.01	8	8.99		6.87	1.17	40.38	0.033
	Other	12	10.81	6	6.74		11.00	1.82	66.37	0.009
HIV status
	Negative	96	86.49	67	75.28		Ref
	Positive	15	13.51	22	24.72	0.043	0.48	0.23	0.98	0.045
Sick_Cough
	No	36	52.94	17	32.69		Ref
	Yes	32	47.06	35	67.31	0.027	2.30	1.09	4.90	0.028
Malaria
	No	76	68.47	72	80.90		Ref
	Yes	35	31.53	17	19.10	0.046	1.95	1.00	3.78	0.048