Table 1 Median (range) for maternal age, gestational age and maternal weight in the various study groups.

Number of cases

15,900

159

23

19

36

17

64

Maternal age(years)

27.16

(15.65–44.52)

29.29

(19.93–41.51)

30

(20.00-34.42)

29.15

(21.2-41.19)

28

(21.10-41.51)

29.14

(24.00-34.14)

28.24

(19.93–35.03)

Maternal weight(kg)

54(40–118)

54(42–90)

54(45–90)

52(42–74)

54(44-69.6)

52(48.5–64)

54.5(43.5–86)

Gestational age(days)

120

(105–146)

118

(105–144)

116

(105–134)

118

(106–136)

118

(106–137)

119

(105–144)

116

(105–142)