Table 3.
Baseline predictors of adherence and retention.
| Characteristic | Logged in twice OR (95% CI) |
P | Logged in ≥3 times OR (95% CI) |
P | Responded at 3 months OR (95%CI) |
P | |
| Age a |
|
|
|
|
|
|
|
|
|
Per 11-year increase | 1.23 (1.16-1.30) | <.001 | 1.41 (1.31-1.52) | <.001 | 1.36 (1.29-1.44) | <.001 |
| Gender (at logtotal + 1 = 3.83) |
|
|
|
|
|
|
|
|
|
Females vs males | 1.12 (1.02-1.23) | .02 | 1.12 (0.83-1.28) | .09 | 1.35 (1.22-1.47) | <.001 |
| University degree |
|
|
|
|
|
|
|
|
|
Degree vs no degree | 1.24 (1.13-1.37) | <.001 | 1.31 (1.15-1.50) | <.001 | 1.17 (1.07-1.29) | .001 |
| Ethnicity |
|
|
|
|
|
|
|
|
|
White British vs other | 0.89 (0.78-1.01) | .08 | 0.85 (0.72-1.00) | .06 | 1.24 (1.09-1.41) | .001 |
| Children |
|
|
|
|
|
|
|
|
|
No children vs children | 1.12 (1.01-1.25) | .04 | 1.15 (0.99-1.33) | .06 | 1.25 (1.12-1.39) | <.001 |
| Provided address or phone number |
|
|
|
|
|
|
|
|
|
Yes vs no | 1.1 (0.91-1.11) | .88 | 0.91 (0.79-1.03) | .14 | 1.20 (1.09-1.32) | <.001 |
| Past-week alcohol consumption in units (logtotal + 1) |
|
||||||
|
|
Per 0.78-unit increase in womena | 1.13 (1.05-1.21) |
|
1.15 (1.03-1.27) |
|
0.87 (0.81-0.93) |
|
|
|
Per 0.78-unit increase in mena | 0.99 (0.93-1.07) |
|
0.97 (0.88-1.07) |
|
0.91 (0.85-0.97) |
|
| EQ5D |
|
|
|
|
|
|
|
|
|
Per 0.19-unit increasea | 1.02 (0.97-1.07) | .40 | 0.99 (0.93-1.06) | .80 | 1.07 (1.02-1.12) | .01 |
| Confidence |
|
|
|
|
|
|
|
|
|
Per 1.15-unit increasea | 0.92 (0.87-0.97) | .001 | 0.93 (0.87-1.0) | .04 | 1.06 (1.01-1.12) | .013 |
| Intention |
|
|
|
|
|
|
|
|
|
Per 1.08-unit increasea | 1.27 (1.21-1.34) | <.001 | 1.45 (1.35-1.56) | <.001 | 0.86 (0.82-0.90) | <.001 |
| Trial allocation group |
|
|
|
|
|
|
|
|
|
Intervention vs control | 1.84 (1.68-2.03) | <.001 | 3.43 (2.99-3.94) | <.001 | 0.70 (0.64-0.76) | <.001 |
a Continuous predictors expressed as per 1 SD change.