Table 1.
Demographic characteristics comparable across all stages.
| Stage of study | N | Age (years) | Gender (male) | |||||||
|
|
|
Mean (SD) | Range | t (df) | P | n/N (%) | χ21 | P | ||
| Screened | 11,530 | 41.1 (14.6) | 16-90 | –9.86 (3492) | <.001 | 6164/11,461 (53.78) |
|
|
||
|
|
Noneligible | 6565 | 43.7 (16.1) | 16-90 |
|
|
3633/6514 (55.77) | 30.7 | <.001 | |
|
|
Eligible | 4186 | 39.2 (13.2) | 18-65 |
|
|
2103/4181 (50.30) |
|
|
|
| Point of consent |
|
|
|
3.23 (1842) | .001 |
|
0.3 | .59 |
|
|
|
|
Refused | 2278 | 40.2 (13.9) | 18-65 |
|
|
1142/2274 (50.22) |
|
|
|
|
|
Randomized | 1139 | 38.3 (12.5) | 18-65 |
|
|
560/1139 (49.17) |
|
|
|
| Intervention period |
|
|
|
–0.73 (561) | .47 |
|
7.2 | .009 | ||
|
|
Completers | 536 | 38.5 (12.7) | 18-65 |
|
|
261/536 (48.7) |
|
|
|
|
|
Dropouts | 27 | 40.3 (13.0) | 21-63 |
|
|
6/27 (22.2) |
|
|
|
| Follow-up period |
|
|
|
–1.28 (36) | .21 |
|
10.1 | .002 | ||
|
|
Completers | 1088 | 38.3 (12.5) | 18-65 |
|
|
545/1088 (50.09) |
|
|
|
|
|
Withdrawals | 35 | 41.1 (12.6) | 18-63 |
|
|
8/35 (22.9) |
|
|
|
| Postal survey |
|
|
|
–8.14 (1120) | <.001 |
|
18.5 | <.001 | ||
|
|
Completers | 534 | 41.5 (12.6) | 18-65 |
|
|
227/534 (41.0) |
|
|
|
|
|
Dropouts | 589 | 35.5 (11.8) | 18-65 |
|
|
326/589 (59.0) |
|
|
|