Table 8.
Predictors and covariates of smoking relapse after six months, from two multivariate logistic regression models
| Predictors’ category | Predictors / covariates | b | OR | SE | p | 95%CI on OR | |
|---|---|---|---|---|---|---|---|
| MODEL 1: Predictors measured at baseline and after 1 month | |||||||
| Demographics | Country | − 0.263 | 0.76 | 0.263 | 0.317 | 0.45 | 1.28 |
| Age | − 0.008 | 0.99 | 0.029 | 0.793 | 0.93 | 1.05 | |
| Sex | − 0.025 | 0.97 | 0.234 | 0.915 | 0.61 | 1.54 | |
| Treat/Control | Experiment group | − 0.336 | 0.71 | 0.242 | 0.165 | 0.44 | 1.14 |
| Baseline | Number of years smoking | − 0.031 | 0.97 | 0.015 | 0.038 | 0.94 | 0.99 |
| Cigarettes/day | 0.003 | 1.00 | 0.017 | 0.873 | 0.97 | 1.03 | |
| min before the first cigarette of the day | − 0.003 | 0.99 | 0.001 | 0.045 | 0.99 | 1.00 | |
| Use other tobacco products | − 0.160 | 0.85 | 0.094 | 0.090 | 0.70 | 1.02 | |
| Use heated tobacco | − 0.614 | 0.54 | 0.618 | 0.321 | 0.16 | 1.81 | |
| Use e-cigarettes | 0.118 | 1.12 | 0.123 | 0.337 | 0.88 | 1.43 | |
| Use nicotine medications | − 0.864 | 0.42 | 0.316 | 0.006 | 0.22 | 0.78 | |
| Being depressed | − 0.195 | 0.82 | 0.215 | 0.363 | 0.54 | 1.25 | |
| Follow-up after 1 month | Used heated tobacco | 1.404 | 4.07 | 0.807 | 0.082 | 0.83 | 19.78 |
| Use e-cigarettes | − 0.239 | 0.78 | 0.201 | 0.234 | 0.53 | 1.16 | |
| Use nicotine medications | − 0.029 | 0.97 | 0.317 | 0.927 | 0.52 | 1.80 | |
| Current use of any smoking cessation app | − 0.612 | 0.54 | 0.252 | 0.015 | 0.33 | 0.88 | |
| Intention to quit smoking | -1.278 | 0.27 | 0.351 | < 0.001 | 0.14 | 0.55 | |
| Perceived helpfulness of the app | − 0.270 | 0.76 | 0.123 | 0.028 | 0.60 | 0.97 | |
| MODEL2: Covariates measured at 6 months | |||||||
| Used heated tobacco | − 0.057 | 0.94 | 0.335 | 0.865 | 0.48 | 1.82 | |
| Use e-cigarettes | 0.017 | 1.01 | 0.194 | 0.931 | 0.69 | 1.48 | |
| Use nicotine medication | 0.354 | 1.42 | 0.306 | 0.247 | 0.78 | 2.59 | |
| Current use of any smoking cessation app | 0.072 | 1.07 | 0.244 | 0.767 | 0.66 | 1.73 | |
| Perceived helpfulness of the app | − 0.333 | 0.71 | 0.131 | 0.011 | 0.55 | 0.92 | |
| Number of different days when the app was accessed (automatically collected) | 0.004 | 1.00 | 0.009 | 0.647 | 0.98 | 1.02 | |
| Number of times the app was opened (automatically collected) | 0.002 | 1.00 | 0.002 | 0.226 | 0.99 | 1.00 | |
| App’s use duration (automatically collected) | − 0.002 | 0.99 | 0.001 | 0.128 | 0.99 | 1.00 | |
b = beta coefficient; OR = odds-ratio; SE = standard error; p = p-value; CI = confidence interval