Table 4.
personal and socio-economic factors of the study mothers tested versus CTVB of home address (n.1360).
| Personal or socio-economic factor | Range cross-tabulated versus CTVBs A – E+ | X2 for trend | Degrees of freedom | P value |
| Mother's social class by RG classification | I, II, IIINM, IIIM, IV, V | 95.30 | 1 | < 0.001 |
| Mother's weekly family income at recruitment | < £100, £100–199, £200–299, £300–399, >£400 | 128.6 | 1 | < 0.001 |
| Money from DSS for baby equipment | Yes or no | 30.3 | 1 | < 0.001 |
| Mother's highest educational attainment | CSE, Vocational, O-level, A-level, Degree | 136.0 | 1 | < 0.001 |
| Partner's highest educational attainment | CSE, Vocational, O-level, A-level, Degree | 101.9 | 1 | < 0.001 |
| Mother's accommodation status | Owned, mortgaged, council-rented, housing association rented, privately rented (furnished), privately rented (unfurnished), other | 73.7 | 1 | <0.001 |
| Number living rooms in mother's accommodation | 0 – 10 inclusive | 126.0 | 1 | < 0.001 |
| Mould or damp in mother's accommodation | Yes or no | 10.0 | 1 | 0.002 |
| Mother smoking cigarettes in pregnancy | Yes or no | 73.6 | 1 | < 0.001 |
| Mother smoking cigarettes since birth of child | Yes or no | 75.0 | 1 | < 0.001 |