| Variable | Description | Codes/Values/Unit |
|---|---|---|
| Age | Age of parent | 0=under 20, 1=20 years old to 34 years old, 2=35 years old and above |
| Residence | Indicator of the residential area of a parent | 0=rural, 1=urban |
| Antecedents | Indicator on whether a new born is the first or not | 0=Not the first newborn, 1 = first newborn, |
| Abortion | Indicator on whether a parent aborted previously | 0=not aborted, 1=aborted once, 2= aborted more than once |
| Child birth | Type of child birth | 0=born using ventouse, 1=born naturally, 2= born after surgery |
| Gender | Gender of a newborn | 0=female, 1=male |
| Number | Indicator of the number of births at a time | 0=singleton, 1=multiple |
| APGAR | Score of appearance, pulse, grimaces, activity and respiration of a newborn | 0= APGAR less than 4/10, 1=APGAR from 4/10 to 6/10, 2=APGAR greater or equal to 7/10 |
| Weight | Weight of a newborn | 0 = under 2500 g, 1= 2500 g to 4500 g, 2= above 4500 g |
| Head | Head circumference of a newborn | 0= below 32 cm, 1=32 cm to 36 cm, 2=above 36 cm |
| Height | Height of a newborn | 0=below 46 cm, 1=46 cm to 54 cm, 2=above 54 cm |
| Time | Time from recruitment to study termination | Days |
| Event | Indicator describing if death occurred during the study time or not | 0=censored, 1=dead |
| n_events | Indicator on the rank of records per subject | 1=first record, 2=second record |