Table 1.
Participant characteristics by trial arm. Values are numbers (percentages) unless stated otherwise
| Characteristics | Control arm (n=893) | Preloading arm (n=899) | Total (n=1792) |
|---|---|---|---|
| Mean (SD) age (years) | 48.8 (13.4) | 49.1 (13.3) | 48.9 (13.4) |
| Men | 469 (52.6) | 473 (52.6) | 942 (52.6) |
| Women | 422 (47.3) | 426 (47.4) | 848 (47.4) |
| Ethnicity: | |||
| White British | 675 (75.6) | 680 (75.6) | 1355 (75.6) |
| White Irish | 36 (4.0) | 25 (2.8) | 61 (3.4) |
| White other | 57 (6.4) | 55 (6.1) | 112 (6.3) |
| White and black Caribbean | 17 (1.9) | 15 (1.7) | 32 (1.8) |
| White and black African | 3 (0.3) | 5 (0.6) | 8 (0.5) |
| White and Asian | 8 (0.9) | 6 (0.7) | 14 (0.8) |
| Mixed other | 7 (0.8) | 8 (0.9) | 15 (1.8) |
| Indian | 11 (1.2) | 10 (1.1) | 21 (1.2) |
| Pakistani | 9 (1.0) | 6 (0.7) | 15 (0.8) |
| Bangladeshi | 2 (0.2) | 13 (1.5) | 15 (0.8) |
| Asian other | 3 (0.3) | 3 (0.3) | 6 (0.3) |
| Black-Caribbean | 29 (3.3) | 34 (3.8) | 63 (3.5) |
| Black African | 8 (0.9) | 13 (1.5) | 21 (1.2) |
| Black other | 4 (0.5) | 3 (0.3) | 7 (0.4) |
| Chinese | 3 (0.3) | 2 (0.2) | 5 (0.3) |
| Other | 12 (1.3) | 14 (1.6) | 26 (1.5) |
| More than one option | 0 | 4 (0.4) | 4 (0.2) |
| Missing | 9 (1.0) | 7 (0.8) | 16 (0.9) |
| Educational qualifications: | |||
| Degree, or equivalent, and higher | 201 (22.5) | 218 (24.3) | 419 (23.4) |
| A level, vocational level 3 and higher | 198 (22.2) | 207 (23.0) | 405 (22.6) |
| Below A level or below vocational level 3 | 230 (25.8) | 212 (23.6) | 442 (24.7) |
| Other (eg, foreign qualification) | 52 (5.8) | 52 (5.8) | 104 (5.8) |
| No formal qualifications | 204 (22.8) | 199 (22.1) | 403 (22.5) |
| Missing | 8 (0.9) | 11 (1.2) | 19 (1.06) |
| Occupation: | |||
| Employed | 467 (52.3) | 468 (52.1) | 935 (52.3) |
| Unemployed | 126 (14.1) | 116 (12.9) | 242 (13.5) |
| Homemaker | 33 (3.7) | 44 (4.9) | 77 (4.3) |
| Student | 17 (1.9) | 22 (2.5) | 39 (2.2) |
| Retired | 153 (17.1) | 152 (16.9) | 305 (17.1) |
| Long term sick or disabled | 26 (2.9) | 26 (2.9) | 52 (2.9) |
| Missing | 4 (0.5) | 8 (0.9) | 12 (0.7) |
| Method of tobacco consumption: | |||
| Manufactured cigarette | 615 (68.9) | 607 (67.5) | 1222 (68.2) |
| Tobacco roll-up | 272 (30.5) | 284 (31.6) | 556 (31.0) |
| Cigar | 6 (0.7) | 8 (0.9) | 14 (0.8) |
| Mean (SD) No of cigarettes/day | 18.7 (9.0) | 19.1 (9.6) | 18.9 (9.3) |
| Mean (SD) dependence* | 5.2 (2.2) | 5.2 (2.2) | 5.2 (2.2) |
| Mean (SD) carbon monoxide concentration (ppm) | 23.8 (12.8) | 23.5 (12.3) | 23.7 (12.5) |
| Mean (SD) longest previous abstinence (days) | 358.4 (750.7) | 442.3 (993.7) | 400.3 (881.4) |
| Smoking cessation support in past 6 months: | |||
| Yes | 304 (34.0) | 279 (31.0) | 583 (32.5) |
| No | 588 (65.9) | 619 (68.9) | 1207 (67.4) |
| Missing | 1 (0.1) | 1 (0.1) | 2 (0.1) |
*
Fagerstrom test for cigarette dependence, scored 0-10, with higher scores representing greater dependence.