Variable

HbSS (N = 98)

HbSC (N = 66)

HbAA (N = 160)

Age (years)

18 - 24

28 (28.6)

16 (24.2)

47 (29.4)

25 - 34

56 (57.1)

33 (50)

78 (48.8)

≥35

14 (14.3)

17 (25.8)

35 (21.8)

Parity

Nulliparous

44 (44.9)

28 (42.4)

53 (33.1)

Primiparous

35 (35.7)

23 (34.8)

46 (28.8)

Multiparous

19 (19.4)

15 (22.8)

61 (38.1)

Gestational age at delivery

≤27

4 (4.1)

0 (0)

0 (0)

28 - 30

2 (2)

1 (1.5)

1 (0.6)

31 - 32

6 (6.1)

4 (6.1)

5 (3.1)

33 - 34

9 (9.2)

6 (9.1)

10 (6.3)

35 - 37

11 (11.2)

14 (21.2)

24 (15)

38 - 39

56 (57.1)

34 (51.5)

88 (55)

40 - 42

10 (10.3)

7 (10.6)

32 (20)

Mean haemoglobin concentration (g/dl)

Before labour

8.4 ± 0.8

9.6 ± 1.5

10.6 ± 2.4

48 hour post delivery

6.9 ± 1.3

8.2 ± 1.8

9.2 ± 2.8