Table 8 Effects of maternal ethnicity, weight, height, body mass index (BMI), parity, and age on biparietal diameter outer – outer (BPDoo)

Ethnicity

0.82

Fulani

40.52

40.19

40.85

9.8

Kirdi

40.47

40.15

40.78

11.2

Weight (centiles)

0.39

< 10

40.30

39.64

40.97

10.1

10–90

40.44

40.18

40.69

10.6

90+

41.11

40.40

41.83

10.6

Height (centiles)

0.83

< 10

40.47

39.77

41.17

9.7

10–90

40.54

40.27

40.80

10.7

90+

40.25

39.64

40.86

10.6

BMI (centiles)

0.33

< 10

40.47

39.74

41.19

8.5

10–90

40.44

40.19

40.69

10.7

90+

40.91

40.19

41.63

10.7

Parity

0.01

0

38.67

37.97

39.38

11.4

1

39.04

38.39

39.69

10.1

2

39.70

38.85

40.55

11.2

3

40.41

39.55

41.27

11.5

4

39.45

38.51

40.40

10.3

5+

39.99

39.12

40.87

9.3

Age

0.10

-19

40.25

39.16

41.35

12.3

20–24

39.98

39.37

40.58

10.4

25–29

39.53

39.01

40.06

10.0

30–34

38.55

37.81

39.28

11.9

35+

39.41

38.28

40.55

9.7