Smoker demographic and smoking data summaries for total number sampled and for the matched pair groups
| Variable | Quitters (16) | Non-quitters (16; 6 LTF) | All (53; 9 LTF) |
| Female | 3 (19%) | 3 (19%) | 18 (34%) |
| Age (median, range) | 47 (26–58) | 41 (28–59) | 41.13 (18-67) |
| Occupation | |||
| Managerial and professional | 2 (13%) | 0 | 5 (9%) |
| Unemployed | 10 (63%) | 10 (63%) | 25 (47%) |
| Routine manual | 3 (19%) | 3 (19%) | 8 (15%) |
| Student | 0 | 0 | 1 (2%) |
| Intermediate | 0 | 2 (13%) | 7 (13%) |
| Retired | 0 | 0 | 1 (2%) |
| No answer | 1 (6%) | 4 (25%) | 6 (11%) |
| Ethnicity | |||
| White British | 11 (69%) | 9 (56%) | 30 (57%) |
| South Asian | 3 (19%) | 3 (19%) | 8 (15%) |
| Other white | 2 (13%) | 3 (19%) | 10 (19%) |
| Black African | 0 | 0 | 1 (2%) |
| Black Caribbean | 0 | 0 | 1 (2%) |
| Missing data | 0 | 1 (6%) | 2 (4%) |
| Cigarettes smoked | |||
| 40 | 1 (6%) | 0 | 1 (2%) |
| 30 | 2 (13%) | 2 (13%) | 5 (9%) |
| 25 | 3 (19%) | 3 (19%) | 8 (15%) |
| 20 | 7 (44%) | 9 (56%) | 25 (47%) |
| 15 | 1 (6%) | 2 (13%) | 5 (9%) |
| <15 | 2 (13%) | 1 (6%) | 9 (17%) |
| London Borough | |||
| Tower Hamlets | 2 (13%) | 5 | 12 (23%) |
| City and Hackney | 14 (88%) | 10 | 38 (72%) |
| Newham | 0 | 0 | 3 (6%) |
LTF, lost to follow-up.