Table 3.
Treatment engagement and satisfaction of the assigned website.
| Variable | N | Mean (SD) or No. (%) |
Incident Rate Ratio or Odds Ratio (95% CI) | p valuea | ||
|---|---|---|---|---|---|---|
| Overall (N = 222) | Smokefree (n = 121) | WebQuit (n = 101) | ||||
| Engagement variable | ||||||
| No. of times logged inb | 222 | 4.8 (7.0)c | 4.1 (4.2)c | 5.6 (9.2)c | Incident Rate Ratio: 1.26 (0.98, 1.62) | 0.074 |
| No. of unique days of usec | 222 | 3.9 (4.9)d | 3.5 (3.4)c | 4.5 (6.2)d | Incident Rate Ratio: 1.26 (1.00, 1.60) | 0.052 |
| Minutes spent on the website per session | 222 | 4.7 (5.2)e | 3.1 (2.5)f | 6.8 (6.1)g | Incident Rate Ratio: 2.18 (1.71, 2.77) | <0.001 |
| Total minutes spent on the websiteb | 222 | 20.0 (29.7)h | 11.9 (16.1)i | 29.7 (38.2)j | Incident Rate Ratio: 2.32 (1.68, 3.20) | <0.001 |
| Length of use of website in days (total) | 222 | 54.7 (84.7)k | 56.5 (87.4)l | 52.6 (81.7)m | Incident Rate Ratio: 0.93 (0.62, 1.38) | 0.713 |
| Satisfaction at 3-months, No. (%) | ||||||
| Satisfied with assigned website | 170 | 137/170 (81%) | 81/99 (82%) | 56/71 (79%) | Odds Ratio: 0.89 (0.41, 1.94) | 0.777 |
| Website was useful for quitting | 175 | 126/175 (72%) | 76/99 (77%) | 50/76 (66%) | Odds Ratio: 0.60 (0.30, 1.17) | 0.131 |
| Would recommend assigned website | 153 | 140/153 (92%) | 79/86 (92%) | 61/67 (91%) | Odds Ratio: 0.97 (0.30, 3.11) | 0.952 |
aTwo-sided p values were calculated from regression models adjusted for factors used in stratified randomization: gender, education, and heavy smoking.
bModel further adjusted for age and heavy drinking.
cModel further adjusted for age.
Median values, c 3; d 2; e 3.3; f 2.2; g 5.5; h 10.4; i 6.3; j 16.3; k 17.5; l 20; m 15.