Table 1 Residual missing data after correction in Brussels birth certificates in 2008 and 2009
Variable | % missing data in 2008 (N = 23375) | % missing data in 2009 (N = 24157) |
|---|---|---|
Pregnancy and infant characteristics | ||
Date of birth | 0.00 | 0.00 |
Sex | 0.02 | 0.00 |
Plurality and birth order | 0.00 | 0.00 |
Presentation | 0.44 | 0.19 |
Induction | 0.22 | 0.09 |
Mode of delivery | 0.00 | 0.12 |
Gestational age | 0.28 | 0.28 |
Birthweight | 0.18 | 0.24 |
Respiratory assistance | 15.50 | 0.37 |
1 minute Apgar score | 0.26 | 0.35 |
5 minute Apgar score | 0.27 | 0.36 |
Transfer to NICU | 15.50 | 0.94 |
Parity | 0.74 | 0.12 |
Date of the last delivery | 10.15 | 10.54 |
Hypertension | 0.00 | 0.00 |
Diabetes | 0.00 | 0.00 |
Birth defect | 0.03 | 0.26 |
Place of delivery | 0.00 | 0.00 |
Type of maternity | 0.00 | 0.00 |
Mother characteristics | ||
Birth date | 0.05 | 0.00 |
Educational level | 9.48 | 6.46 |
Employment status | 1.06 | 0.90 |
Type of work | 1.45 | 1.27 |
Original nationality | 2.56 | 0.02 |
Present nationality | 0.07 | 0.01 |
Cohabitation status | 0.55 | 0.26 |
Marital status | 0.15 | 0.11 |
Date of marriage | 0.40 | 0.12 |
Residence | 0.09 | 0.00 |
Father characteristics | ||
Birth date | 1.18 | 0.71 |
Educational level | 7.57 | 5.63 |
Employment status | 1.96 | 1.37 |
Type of work | 1.88 | 1.43 |
Original nationality | 10.70 | 0.77 |
Present nationality | 1.44 | 0.74 |