Smoking prevalence by social class, age left full time education, and housing tenure
| Self report (%) | Cotinine validated (%) | Absolute difference† | Relative difference‡ | Base (No.)§ | |
|---|---|---|---|---|---|
| *χ2(1 df) p>0.05, not significant. Based on comparison of number of smokers before and after biochemical validation. | |||||
| †Absolute difference based on difference in rates before and after biochemical validation. | |||||
| ‡Relative difference based on percentage of self reported non-smokers who failed biochemical validation. | |||||
| §Base not consistently = 579 due to item non-response. | |||||
| Social class* | |||||
| Non-manual | 11.6 | 14.7 | 3.1 | 3.6 | (251) |
| Manual | 43.3 | 46.0 | 2.7 | 4.9 | (326) |
| Age left full time education* | |||||
| 15–16 | 41.5 | 44.4 | 2.9 | 4.9 | (311) |
| ⩾17 | 15.1 | 18.1 | 3.0 | 3.6 | (265) |
| Housing tenure* | |||||
| Own/mortgage | 14.2 | 17.1 | 2.9 | 3.4 | (339) |
| Rent | 52.5 | 55.3 | 2.8 | 5.8 | (219) |