Table 2.
Comparison of Crush the Crave and On the Road to Quitting on primary and secondary outcomes at 3 and 6 months (intention-to-treat).
| Outcomes | CTCa (N=820) | OnRQb (N=779) | Odds ratio (95% CI) | P value | ||
| Continuous self-reported abstinence at 6 months, n (%) | ||||||
|
|
Complete cases (n=725) | 49 (13.8)c | 5 (15.4)d | 0.89 (0.59-1.34) | .56 | |
|
|
ITTe–baseline observation carried forward | 50 (6.0) | 60 (7.3) | 0.81 (0.54-1.20) | .28 | |
|
|
ITT–last observation carried forward | 64 (7.8) | 72 (9.2) | 0.83 (0.59-1.18) | .30 | |
|
|
ITT–multiple imputation of outcomesf | 103 (12.6) | 94 (12.1) | 1.05 (0.78-1.41) | .76 | |
| Secondary outcomes (3 months) | ||||||
|
|
Self-reported non-smoking in past 7 days, n (%) | |||||
|
|
|
Complete cases (n=708)g | 105 (30.4)h | 107 (29.5)i | 1.05 (0.76-1.44) | .78 |
|
|
|
ITT–baseline observation carried forward | 133 (16.2) | 124 (15.9) | 1.02 (0.78-1.34) | .87 |
|
|
|
ITT–multiple imputation of outcomes | 268 (32.7) | 243 (31.2) | 1.07 (0.87-1.32) | .52 |
|
|
Self-reported non-smoking in past 30 days, n (%) | |||||
|
|
|
Complete cases (n=712)g | 61 (17.6)j | 61 (16.7)k | 1.06 (0.72-1.57) | .76 |
|
|
|
ITT–baseline observation carried forward | 72 (8.8) | 71 (9.1) | 0.96 (0.68-1.35) | .82 |
|
|
|
ITT–multiple imputation of outcomes | 151 (18.4) | 146 (18.7) | 0.98 (0.76-1.26) | .87 |
| Secondary outcomes (6 months) | ||||||
|
|
Self-reported non-smoking in past 7 days, n (%) | |||||
|
|
|
Complete cases (n=708)g | 114 (33.3)l | 143 (39.1)m | 0.78 (0.57-1.06) | .11 |
|
|
|
ITT–baseline observation carried forward | 150 (18.3) | 174 (22.3) | 0.79 (0.61-0.99) | .05 |
|
|
|
ITT–last observation carried forward | 180 (22.0) | 190 (24.4) | 0.87 (0.69-1.10) | .25 |
|
|
|
ITT–multiple imputation of outcomes | 295 (36.1) | 302 (38.8) | 0.89 (0.73-1.09) | .27 |
|
|
Self-reported non-smoking in past 30 days, n (%) | |||||
|
|
|
Complete cases (n=709 )g | 84 (24.4)n | 107 (29.3)o | 0.78 (0.56-1.09) | .14 |
|
|
|
ITT–baseline observation carried forward | 106 (12.9) | 123 (15.8) | 0.79 (0.60-1.05) | .10 |
|
|
|
ITT–last observation carried forward | 114 (14.4) | 132 (16.9) | 0.82 (0.63-1.08) | .16 |
|
|
|
ITT–multiple imputation of outcomes | 199 (24.3) | 220 (28.2) | 0.81 (0.65-1.02) | .07 |
aCTC: Crush the Crave.
bOnRQ: On the Road to Quitting.
cN=354 for CTC for cases with continuous self-reported abstinence at 6 months.
dN=371 for OnRQ for cases with continuous self-reported abstinence at 6 months.
eITT: intention-to-treat.
fMultiple imputation by chained equations (number of imputations=18).
gNumber of cases is less than 725 because of missing data.
hN=345 for CTC for cases with self-reported non-smoking in past 7 days (secondary outcome at 3 months).
iN=363 for OnRQ for cases with self-reported non-smoking in past 7 days (secondary outcome at 3 months).
jN=347 for CTC for cases with self-reported non-smoking in past 30 days (secondary outcome at 3 months).
kN=365 for OnRQ for cases with self-reported non-smoking in past 30 days (secondary outcome at 3 months).
lN=342 for CTC for cases with self-reported non-smoking in past 7 days (secondary outcome at 6 months).
mN=366 for OnRQ for cases with self-reported non-smoking in past 7 days (secondary outcome at 6 months).
nN=344 for CTC for cases with self-reported non-smoking in past 30 days (secondary outcome at 6 months).
oN=365 for OnRQ for cases with self-reported non-smoking in past 30 days days (secondary outcome at 6 months).