Table 1. Study population parameters according to placental malaria histology.

Placental group	Number of primiparae* (%)	Mean maternal haemoglobin** g/l (s.d.)	Mean cord haemoglobin g/l (s.d.)	Geometric mean maternal total serum IgG** g/l (95% CI)	Mean birth weight† g (s.d.)	Mean neonatal length cm (s.d.)	Mean fetal– placental weight ratio (s.d.)	Mean gestation (weeks) (s.d.)	Neonatal sex ratio M : F
Non-infected	20	118	129	25·2	3101	49·6	6·13	38·8	1·06
(n = 70)	(29)	(15)	(22)	(23·9–26·7)	(385)	(2·9)	(1·25)	(2·7)
Active infection	11	104	130	31·6	2911	49·6	5·94	39·6	1·57
(n = 18)	(61)	(15)	(24)	(27·7–36·0)	(327)	(1·8)	(1·03)	(2·2)
Past infection	9	104	130	29·1	2787	48·1	5·91	36·4	0·67
(n = 15)	(60)	(19)	(16)	(25·5–33·2)	(673)	(2·2)	(1·62)	(4·9)

^*P (infected versus non-infected) < 0·01, χ² test;

^**P (infected versus non-infected) < 0·001, independent t-test;

^†P (infected versus non-infected) < 0·01, independent t-test.