Table 2.

Distribution of missing observations across groups.

Variable	Intention-to-treat, n (%)		Per-protocol, n (%)
	Intervention (n=728)	Comparison (n=251)	Intervention (n=552)	Comparison (n=427)
Age	128 (17.6)	45 (17.9)	95 (17.2)	78 (18.3)
Parity (including current pregnancy)	127 (17.4)	47 (18.7)	97 (17.6)	77 (18.0)
Distance from home village to registration clinic (km)	4 (0.5)	0 (0.0)	1 (0.2)	3 (0.7)
Married/in partnership	94 (12.9)	42 (16.7)	66 (12.0)	70 (16.4)
Employed and/or partner employed	147 (20.2)	61 (24.3)	104 (18.8)	104 (24.4)
Missing any of the above variables	151 (20.7)	63 (25.1)	106 (19.2)	108 (25.3)