Table 2

Low Birthweight and Preterm delivery rates by mothers' age and gravidity

Characteristics

LBW deliveries (72)

Preterm deliveries (154)


n

% of age group

p

OR

95% CI

n

% of age group

p

OR

95% CI


Age (years)


≤ 20*

7/26

26.9

-

1

-

7/26

26.9

-

1

-


21 - 35

55/685

8.0

0.002

0.24

0.10, 0.59

130/685

18.9

0.450

0.64

0.26, 1.54


> 35

10/85

12.0

0.117

0.36

0.12, 1.08

18/85

21.7

0.729

0.73

0.27, 2.01


No of previous pregnancies


Primigravidae

7/92

7.6

0.240

0.56

0.24, 1.30

9/92

9.8

0.026

0.41

0.19, 0.87


Secondigravidae*

34/264

12.9

-

1

-

55/264

20.8

-

1

-


Multigravida

31/440

7.0

< 0.001

0.05

0.03, 0,08

90/440

20.5

0.981

0.98

0.67, 1.42


*reference category against which other groups were compared

P values generated from Chi sq test, and OR from 2 × 2 table analyses

Tongo et al. BMC Pregnancy and Childbirth 2011 11:60   doi:10.1186/1471-2393-11-60

Open Data