Risk factor

Number

Percentage

Preterm rupture of membranes

64

46.4

No maternal antenatal care

49

35.5

Multiple pregnancy

37

26.8

Hypertension in pregnancy

33

23.9

Abdominal massage

18

13.0

Ante-partum haemorrhage

17

12.3

Maternal febrile illness

13

9.4

Teenage mother

9

6.5

Birth defect

8

5.8

Maternal chorioamnionitis

6

4.3

Previous preterm delivery

4

2.9

Ingestion of herbal concoctions

1

0.7

Illicit drug intake

1

0.7