KCH-Bwaila
0 = KCH
1 = Bwaila

Code numerical
0 = controls
1 = cases

Age of respondent
1 = I don't know
2 = I'm not sure
3 = I don't know

Age groups of respondant
1 = <20
2 = 20-29
3 = >30

Race of respondent
1 = African
2 = Asian
3 = Other Specify

0 = single
1 = married/cohabitating
2 = divorced/separeted

Gravidity
0 = gravida1&2
1 = gravida3&4&5
2 = gravida6&above

previous preterm pregnancy
0 = No
1 = Yes
2 = NA

Education level
0 = up to primary
1 = secondary
2 = college and above

Have you used herbal medication in this pregnancy
1 = no
2 = yes

Ultrasound groups gestation age
1 = <28
2 = 28w 0d - 31w 6d
3 = 32w 0d - 33w 6d
4 = 34w 0d - 36w 6d
5 = >37w

Ultrasound groups gestation age
0 = 37-<41
1 = <28
2 = 28-<34
3 = 34-<37

Birth weight goups
0 = up to 1500
1 = 1501-2500
2 = 2501-4000
3 = >4000

Sex of the baby
1 = Male
2 = Female

0 = No
1 = Yes

1 = yes
2 = no

Results HIV test
1 = negative
2 = positive
3 = Unknown

1 = >11g/dl
2 = 11g/dl

Test results haemoglobin
1 = Above 11g/dl
2 = Between 10-10-.9g/gl
3 = Between 7-9.9g/dl
4 = Less than 7g/dl

Malaria antigen test
1 = positive
2 = negative

Baby maturity assessment age groups
1 = <28 weeks
2 = 28 wks 0d-31wks 6ds
3 = 32wks 0d-36wks 6dys
4 = 34 wks-36wks 6dys
5 = >37 wks 0dys

Placenta malaria negative or positive
0 = negative
1 = positive