Maternal age, grouped
1 = =<24
2 = 25-29
3 = 30-34
4 = 35+

Maternal age, grouped
1 = <20
2 = 20+

Trimester at first ANC visit
1 = 1st trim
2 = 2nd trim
3 = 3rd trim

Trimester at first ANC visit
1 = 2nd/3rd trimester
2 = 1st trimester

Gravidity
1 = 1
2 = 2-3
3 = 4+

Gravidity
1 = 2+
2 = 1

Parity
1 = 0
2 = 1-2
3 = 3+

Malaria
0 = No
1 = Yes