Table 1.
Description of sample before and after smoke-free legislation in Scotland. Values are numbers (percentages) unless stated otherwise
| Characteristic | 2006 (n=2532) | 2007 (n=2389) |
|---|---|---|
| Mean age (years) | 11.5 | 11.4 |
| Boys | 1289 (50.9) | 1227 (51.4) |
| Family affluence scale*: | (n=2445) | (n=2258) |
| Low | 803 (32.8) | 739 (32.7) |
| Medium | 825 (33.7) | 763 (33.8) |
| High | 817 (33.4) | 756 (33.5) |
| Cotinine confirmed smoking status†: | ||
| Non-smokers | 2339 (92.3) | 2217 (92.8) |
| Smokers | 46 (1.8) | 35 (1.5) |
| Missing‡ | 147 (5.8) | 137 (5.7) |
| Family structure (parent figures that sample lives with): | ||
| Both parents | 1723 (68.0) | 1602 (67.1) |
| Parent and step parent | 240 (9.5) | 229 (9.6) |
| Single mother | 453 (17.9) | 432 (18.1) |
| Single father | 45 (1.8) | 41 (1.7) |
| Other§ | 36 (1.4) | 35 (1.5) |
| Unclassifiable | 17 (0.7) | 33 (1.4) |
| Missing | 18 (0.7) | 17 (0.7) |
*Pupils who reported living in both parent, step, or single parent families only.
†Non-smokers=self reported non-smokers with cotinine concentrations <15 ng/ml; smokers=cotinine concentrations >15 mg/ml regardless of self reported smoking status.
‡Pupils who did not answer the smoking question or have a cotinine concentration assigned to them by the laboratory.
§Pupils who reported to be living in a foster home or children's home or some other arrangement.