Baseline characteristics of trial participants
| Basic (n = 469) | Weekly (n = 456) | |
|---|---|---|
| FTND, Fagerstrom test for nicotine dependence; CO, carbon monoxide. | ||
| All values are percentages of the available data unless indicated otherwise. | ||
| *Mean (SD). | ||
| †Median (IQR). | ||
| Women, n (%) | 247 (52.7) | 229 (50.2) |
| Age (years)* | 42.9 (11.9) | 44.3 (11.7) |
| Ethnic background, n (%) | ||
| White | 431 (98.0) | 423 (97.2) |
| Oriental | 0 (0.0) | 4 (0.9) |
| Indian, Pakistani, Bangladeshi | 7 (1.6) | 8 (1.8) |
| Other | 2 (0.5) | 0 (0.0) |
| Has partner | 301 (74.1) | 293 (71.5) |
| Live with smoker | 202 (48.1) | 189 (44.4) |
| Weekly units of alcohol† | 8 (18) | 6 (15) |
| Daily cigarette consumption | ||
| 1–9 | 7 (1.6) | 6 (1.4) |
| 10 | 22 (5.1) | 27 (6.4) |
| 11–20 | 221 (50.9) | 222 (52.5) |
| 21–30 | 146 (33.6) | 122 (28.8) |
| >30 | 38 (8.8) | 46 (10.9) |
| FTND* | 5.1 (2.2) | 5.1 (2.1) |
| Baseline CO (ppm)* | 22.6 (10.4) | 22.3 (10.0) |
| Baseline plasma cotinine concentration (ng/ml)* | 284 (126) | 280 (120) |
| Longest duration of past quit attempt (days)† | 28 (177) | 21 (178) |
| Age started smoking* | 16.5 (3.6) | 16.3 (3.6) |
| Smoking product | ||
| Manufactured cigarette | 379 (80.8) | 360 (78.9) |
| Roll up cigarette | 86 (18.3) | 91 (20.0) |
| Cigar | 4 (0.9) | 3 (0.7) |
| Pipe | 0 (0.0) | 2 (0.4) |