Table 2.
Demographic characteristics of Txt2stop, Trial 1 and Trial 2 populations
| Variable | Txt2stop population N (%) | Trial 1 population N (%) | Trial 2 population N (%) |
|---|---|---|---|
| Gender | |||
| Women | 2605 (44.9) | 883 (45.3) | 60 (47.2) |
| Men | 3195 (55.1) | 1067 (54.7) | 67 (52.8) |
| Age (years) | |||
| <30 | 1572 (27.1) | 573 (29.4) | 64 (50.4) |
| 30–45 | 2716 (46.8) | 897 (46.0) | 50 (39.4) |
| >45 | 1512 (26.1) | 480 (24.6) | 13 (10.2) |
| Ethnicity | |||
| White | 5136 (88.5) | 1771 (90.8) | 109 (85.8) |
| Black | 240 (4.1) | 62 (3.2) | 6 (4.7) |
| Asian | 253 (4.4) | 61 (3.1) | 8 (6.3) |
| Other | 134 (2.3) | 45 (2.3) | 3 (2.4) |
| Unknown | 37 (0.6) | 11 (0.6) | 1 (0.8) |
| Age left school | |||
| ≤16 | 2538 (43.8) | 985 (50.5) | 54 (42.5) |
| >16 | 3262 (56.2) | 965 (49.5) | 73 (57.5) |
| Employment | |||
| Manual | 1789 (30.8) | 523 (26.8) | 28 (22.0) |
| Nonmanual | 2539 (43.8) | 679 (34.8) | 45 (35.4) |
| N/A unknown | 1472 (25.4) | 748 (38.4) | 54 (42.5) |
| Fagerstrom index | |||
| ≤5 | 3488 (60.1) | 1154 (59.2) | 59 (46.5) |
| >5 | 2312 (39.9) | 796 (40.8) | 68 (53.5) |