Table 2.
The effect of user characteristics on measures of engagement (number of sessions and time on app).
| User characteristics | Sessions, median (IQRa) | Unadjusted simple linear regression | Adjustedb multiple regression | Time on app (min), median (IQR) | Unadjusted simple linear regression | Adjustedb multiple regression | ||||||
| Bc (95% CI) | P value | B (95% CI) | P value | B (95% CI) | P value | B (95% CI) | P value | |||||
| Age (years) | —d | .02 (0.02 to 0.03) | <.001 | .03 (0.02 to 0.03) | <.001 | — | .03 (0.02 to 0.03) | <.001 | .03 (0.02 to 0.03) | <.001 | ||
| Gender | ||||||||||||
|
|
Male (reference; n=295) | 7 (2 to 18) | — | — | — | — | 16 (8 to 34) | — | — | — | — | |
|
|
Female (n=377) | 5 (2 to 15) | .14 (−0.05 to 0.33) | .14 | .12 (−0.07 to 0.31) | .21 | 18 (9 to 41) | .13 (−0.02 to 0.29) | .09 | .11 (−0.03 to 0.26) | .13 | |
| Employment status | ||||||||||||
|
|
Unemployed (reference; n=91) | 5 (1 to 15) | — | — | — | — | 15 (9 to 37) | — | — | — | — | |
|
|
Employed (n=581) | 6 (2 to 17) | .23 (−0.04 to 0.51) | .10 | .27 (−0.01 to 0.54) | .06 | 18 (9 to 37) | .06 (−0.16 to 0.28) | .61 | .12 (−0.10 to 0.34) | .27 | |
| Ethnicity | ||||||||||||
|
|
White (reference; n=640) | 5 (2 to 17) | — | — | — | — | 17 (9 to 38) | — | — | — | — | |
|
|
Not white (n=32) | 6 (2 to 16) | −.09 (−0.54 to 0.35) | .68 | .01 (−0.43 to 0.45) | .96 | 17 (10 to 27) | −.06 (−0.42 to 0.29) | .74 | .04 (−0.30 to 0.39) | .81 |
|
| Educational qualification | ||||||||||||
|
|
Pre-16 (reference; n=188) | 4 (2 to 13) | — | — | — | — | 15 (8 to 34) | — | — | — | — | |
|
|
Post-16 (n=484) | 6 (2 to 18) | .31 (0.10 to 0.52) | .004 | .36 (0.15 to 0.57) | <.001 | 18 (9 to 41) | .12 (−0.05 to 0.28) | .18 | .18 (0.02 to 0.16) | .03 |
|
| Current smoker | ||||||||||||
|
|
Yes (reference; n=165) | 4 (2 to 16) | — | — | — | — | 15 (8 to 29) | — | — | — | — | |
|
|
No (n=507) | 6 (2 to 18) | .20 (−0.02 to 0.42) | .08 | .01 (−0.22 to 0.23) | .96 | 18 (9 to 39) | .16 (−0.01 to 0.34) | .07 | −.02 (−0.19 to 0.16) | .84 | |
| Past week alcohol consumption (units)e | — | 0 (0) | .570 | 0 (0) | .75 | — | 0 (0) | .47 | 0 (0) | .37 | ||
| Alcohol use (AUDITf score) | — | −.01 (−0.02 to 0) | .19 | −.01 (−0.02 to 0.01) | .42 | — | 0 (–0.01 to 0.01) | .64 | 0 (–0.01 to 0.01) | .94 | ||
aIQR: interquartile range.
bAdjusted for all sociodemographic variables, AUDIT score, and treatment group (unless otherwise specified).
cUnstandardized regression coefficient.
dNot applicable.
eAdjusted for all sociodemographic variables and treatment group (not AUDIT score).
fAUDIT: Alcohol Use Disorder Identification Test.