Comparison of VLBW and CHDS cohorts on social, perinatal, and school related factors
| Measure | VLBW cohort (n = 298) | CHDS cohort (n = 1092) | p Value |
|---|---|---|---|
| Sociodemographic factors: | |||
| Mean age of mother at birth of child (years) | 25.8 | 25.8 | >.80 |
| Mother had no formal educational qualifications | 39.9% | 47.2% | <.05 |
| Child of Maori/Pacific Island ethnicity | 32.9% | 14.4% | <.001 |
| Single parent family | 21.2% | 12.3% | <.001 |
| Mother smoked during pregnancy | 33.9% | 34.2% | >.80 |
| Child fed breast milk (( 1 month) | 72.5% | 70.5% | >.50 |
| Mean duration of breastfeeding (months) | 3.9 | 4.0 | >.60 |
| Perinatal factors: | |||
| Male | 48.3% | 51.0% | >.40 |
| Multiple birth | 24.2% | 2.1% | <.0001 |
| Non-spontaneous delivery | 68.1% | 17.4% | <.0001 |
| Mean maternal parity | 2.3 | 2.0 | <.01 |
| School factors: | |||
| Child in third year of schooling | 17.7% | 24.2% | <.05 |