Table 4.

Numbers, proportions (%) and risk ratios (RR, 95% CIs of birth outcomes by iron groups

Outcomes	Selective iron n	Routine iron n	Selective iron (%)	Routine iron (%)	Selective iron	Routine iron RR (95% CI)†	p Value
Primary health outcomes
Low birth weight (<2500 g)	136	142	11.8	12.8	1.00	1.09 (0.88 to 1.36)	0.431
Preterm delivery (<37 weeks)	331	299	28.8	27.0	1.00	0.96 (0.84 to1.09)	0.185
Secondary health outcomes
Caesarean section delivery	15	22	1.3	2.0	1.00	1.48 (0.77 to 2.84)	0.238
Negative fetal heart beat at admission	18	29	1.6	2.6	1.00	1.66 (0.93 to 2.96)	0.089
Child ill or dead at birth	29	33	2.5	3.0	1.00	1.20 (0.73 to 1.96)	0.473
Mother ill or dead at birth	5	6	0.4	0.5	1.00	1.25 (0.38 to 4.09)	0.711
Other outcomes
Delivery in reference centre*	210	185	18.3	16.7	1.00	0.91 (0.76 to 1.09)	0.316
Long hospital stay after delivery (≥ 3 days)	46	62	4.0	5.6	1.00	1.43 (0.97 to 1.26)	0.059
No delivery data	993	1075	46.4	49.2	1.00	1.06 (1.00 to 1.13)	0.060

*Jose Macamo or Mavalane or Central Hospital.

†The estimates were not adjusted for any baseline characteristic because the two groups did not differ from each other at baseline.