Table 2. Socio-economic variables and exposure variables, by latent trajectories (weighted percentages).
| Low normal | Mid normal | Overweight | Obese | |
|---|---|---|---|---|
| Socio-economic variables | ||||
| Parental income, 9 months | ||||
| Poorest quintile | 10.2 | 9.2 | 14.6 | 14.9 |
| 2 | 16.3 | 17.2 | 20.0 | 21.6 |
| 3 | 15.4 | 17.0 | 19.5 | 17.7 |
| 4 | 25.4 | 27.2 | 22.0 | 26.4 |
| Richest quintile | 32.7 | 29.4 | 23.9 | 19.4 |
| P-value | <0.0001 | |||
| Highest parental education, 9 months | ||||
| None of these | 3.9 | 3.7 | 5.7 | 7.7 |
| Overseas quals only | 1.1 | 1.1 | 1.4 | 3.1 |
| NVQ 1 | 3.9 | 3.7 | 4.5 | 9.4 |
| NVQ 2 | 20.4 | 22.5 | 26.5 | 29.0 |
| NVQ 3 | 15.8 | 15.9 | 17.5 | 16.1 |
| NVQ 4 | 45.3 | 44.5 | 38.0 | 31.5 |
| NVQ 5 | 9.5 | 8.6 | 6.3 | 3.3 |
| P-value | <0.0001 | |||
| Persistent poverty indicator | ||||
| Never poor | 65.0 | 62.7 | 54.5 | 47.3 |
| Sometimes poor | 30.1 | 33.6 | 39.7 | 45.8 |
| Always poor | 5.0 | 3.8 | 5.8 | 7.0 |
| P-value | <0.0001 | |||
| Exposures | ||||
| Low birthweight | 8.9 | 5.2 | 6.4 | 6.8 |
| High birthweight | 1.1 | 2.1 | 2.3 | 3.6 |
| Smoked during pregnancy | 16.8 | 18.2 | 22.4 | 33.2 |
| Either parent smokes, w1 | 36.2 | 39.7 | 46.5 | 49.8 |
| Breastfeeding initiated | 78.3 | 77.0 | 72.1 | 66.9 |
| Controls | ||||
| Gender | ||||
| Male | 50.3 | 50.9 | 43.3 | 43.8 |
| P-value | 0.0003 | |||
| Ethnicity | ||||
| non-White | 10.0 | 8.2 | 12.1 | 17.0 |
| P-value | <0.0001 | |||
Abbreviation: NVQ, National Vocational Qualification.