Table 2. Enrolment characteristics by treatment arm for trial period (2011–14)^*.

	Women with a less-than-5th-percentile infant†		All women
	Intervention (n=2361)	Control (n=2094)	Intervention (n=48 219)	Control (n=51 523)
Maternal age group (years)
<20	303/2358 (13%)	344/2094 (16%)	5412/48 156 (11%)	6622/51 455 (13%)
20–35	1937/2358 (82%)	1673/2094 (80%)	41 003/48 156 (85%)	42 938/51 455 (83%)
>35	118/2358 (5%)	77/2094 (4%)	1741/48 156 (4%)	1895/51 455 (4%)
Maternal education
No formal school	787/2335 (34%)	687/2077 (33%)	11 005/47 976 (23%)	11 258/51 256 (22%)
Primary	796/2335 (34%)	700/2077 (34%)	17 686/47 976 (37%)	19 515/51 256 (38%)
Secondary	640/2335 (27%)	567/2077 (27%)	15 528/47 976 (32%)	16 170/51 256 (32%)
University	112/2335 (5%)	123/2077 (6%)	3757/47 976 (8%)	4313/51 256 (8%)
Parity
0	899/2348 (38%)	867/2088 (42%)	16 366/47 897 (34%)	17 901/51 434 (35%)
1	553/2348 (24%)	508/2088 (24%)	13 961/47 897 (29%)	14 599/51 434 (28%)
2	896/2348 (38%)	713/2088 (34%)	17 570/47 897 (37%)	18 934/51 434 (37%)
Previous pregnancy loss	208/1525 (14%)	170/1300 (13%)	2567/33 684 (8%)	2449/36 098 (7%)
Received antenatal care	2209/2333 (95%)	1963/2073 (95%)	46 763/47 979 (97%)	50 071/51 182 (98%)
Multiple pregnancy	280/2360 (12%)	274/2094 (13%)	508/48 202 (1%)	500/51 515 (1%)

Data are n/N (%).

^*Dates vary by study site.

^†Cutoffs for the less-than-5th-percentile birthweight groups were determined from 2011 data.