Table 3 Observed and expected prevalence of risk 0–3+ risk factors by adult social class, men and women separately | Number of risk factors | Overall | Non-manual | Manual |
| Observed (% ) | Expected (%) | O/E | Observed (%) | Expected (%) | O/E | Observed (%) | Expected (%) | O/E |
| Men | (n = 3614) | | (n = 2039) | | (n = 1575) | |
| 0 | 39.71 | 35.39 | 1.12 | 47.57 | 42.21 | 1.13 | 29.52 | 27.61 | 1.07 |
| 1 | 36.86 | 43.34 | 0.85 | 33.30 | 42.04 | 0.79 | 41.46 | 43.51 | 0.95 |
| 2 | 18.82 | 18.14 | 1.04 | 15.74 | 13.89 | 1.13 | 22.79 | 23.65 | 0.96 |
| ⩾3 | 4.62 | 3.13 | 1.48 | 3.38 | 1.87 | 1.81 | 6.22 | 5.23 | 1.19 |
| χ2 (3df) | p<0.0001 | | p<0.0001 | | p = 0.0655 | |
| Women | (n = 3560) | | (n = 2554) | | (n = 1006) | |
| 0 | 51.40 | 48.31 | 1.06 | 55.25 | 52.73 | 1.05 | 41.65 | 38.30 | 1.09 |
| 1 | 34.86 | 39.57 | 0.88 | 33.36 | 37.46 | 0.89 | 38.67 | 43.12 | 0.90 |
| 2 | 11.40 | 10.96 | 1.04 | 9.71 | 9.01 | 1.08 | 15.71 | 16.23 | 0.97 |
| ⩾3 | 2.33 | 1.15 | 2.03 | 1.68 | 0.81 | 2.07 | 3.98 | 2.35 | 1.69 |
| χ2 (3df) | p<0.001 | | p<0.0001 | | p = 0.0003 | |