Characteristics of the parents, (all figures are weighted % unless stated otherwise)
| All | Very preterm | Moderately preterm | Late preterm | Early term | Term | Post-term | |
|---|---|---|---|---|---|---|---|
| Gestational age (weeks) | 23–42 | <32 | 32–33 | 34–36 | 37–38 | 39–41 | 42 |
| N (weight %) | 12 100 (100) | 119 (100) | 121 (100) | 646 (100) | 2381 (100) | 8404 (100) | 426 (100) |
| Sociodemographic factors—household level | |||||||
| Marital status—married | 71.9 | 64.9 | 71.0 | 67.8 | 73.6 | 71.8 | 72.2 |
| Socioeconomic position | |||||||
| Mgt & prof | 51.5 | 41.2 | 47.9 | 47.5 | 50.5 | 52.3 | 51.4 |
| Intermediate | 18.4 | 17.4 | 20.1 | 17.2 | 18.9 | 18.3 | 19.1 |
| Routine and manual | 22.8 | 26.4 | 17.7 | 25.8 | 23.3 | 22.4 | 22.7 |
| Never worked/unemployed | 7.3 | 15.0 | 14.3 | 9.5 | 7.3 | 6.9 | 6.8 |
| Sociodemographic factors—mothers | |||||||
| Age, years (mean) | 29.7 | 29.0 | 30.0 | 29.7 | 30.0 | 29.6 | 29.8 |
| Educational status | |||||||
| Higher (NVQ 4+5) | 38.5 | 34.8 | 31.4 | 35.6 | 36.1 | 39.6 | 38.6 |
| Medium (NVQ 3) | 14.8 | 11.0 | 12.4 | 11.7 | 14.7 | 15.2 | 15.1 |
| Lower (NVQ 1+2) | 36.6 | 35.4 | 48.7 | 41.9 | 38.0 | 35.6 | 35.7 |
| Overseas/ other/none | 10.1 | 18.8 | 7.4 | 10.8 | 11.2 | 9.6 | 10.6 |
| Ethnicity—BME | 8.0 | 16.3 | 9.4 | 7.1 | 9.0 | 7.7 | 6.8 |
| Currently employed* | 57.7 | 62.9 | 54.5 | 56.4 | 56.0 | 58.4 | 55.1 |
| Sociodemographic factors—fathers | |||||||
| Age, years (mean) | 32.3 | 31.7 | 32.8 | 32.4 | 32.5 | 32.3 | 31.7 |
| Educational status | |||||||
| Higher (NVQ 4+5) | 37.8 | 28.6 | 40.4 | 35.2 | 37.6 | 38.1 | 38.8 |
| Medium (NVQ 3) | 15.8 | 13.0 | 14.7 | 16.2 | 15.1 | 16.2 | 12.9 |
| Lower (NVQ 1+2) | 34.2 | 33.6 | 31.6 | 34.6 | 35.0 | 33.7 | 37.4 |
| Overseas/other/none | 12.2 | 24.8 | 13.3 | 14.0 | 12.3 | 11.9 | 10.9 |
| Ethnicity—BME | 8.5 | 13.3 | 12.1 | 7.4 | 8.9 | 8.3 | 9.2 |
| Currently employed* | 91.1 | 82.4 | 85.7 | 87.4 | 91.4 | 91.4 | 91.1 |
| Pregnancy/perinatal factors | |||||||
| Unplanned pregnancy | 33.9 | 45.5 | 44.6 | 37.5 | 33.9 | 33.3 | 33.4 |
| Mode of delivery | |||||||
| Vaginal | 66.0 | 34.2 | 35.5 | 50.5 | 56.0 | 71.1 | 64.7 |
| Instrumental | 11.0 | 4.6 | 7.4 | 11.0 | 7.1 | 12.1 | 14.3 |
| Planned section | 10.1 | 5.2 | 10.3 | 11.1 | 26.4 | 5.6 | 4.6 |
| Emergency section | 12.9 | 56.0 | 46.7 | 27.5 | 10.5 | 11.2 | 16.4 |
| Singleton | 98.5 | 88.4 | 82.6 | 89.1 | 97.4 | 99.8 | 99.9 |
| Breast fed ≥4 months | 35.9 | 18.8 | 24.7 | 27.0 | 31.8 | 37.9 | 42.0 |
| First time mother | 40.6 | 39.6 | 42.8 | 43.5 | 40.0 | 40.6 | 39.4 |
| First time father | 40.1 | 40.0 | 42.9 | 55.9 | 51.2 | 45.0 | 51.2 |
| Father present at birth | 94.1 | 79.4 | 81.4 | 90.7 | 93.2 | 94.9 | 95.6 |
*Currently employed or self-employed, a small proportion of the mothers are on leave (n=129).
BME, Black and Minority Ethnic.