Table 3.
Predictors and covariates of smoking cessation after six months, from two multivariate logistic regression models, in users of a smartphone app for smoking cessation, 2019–2021
| Predictors category | Predictors / covariates | b | OR | SE | p | 95%CI on OR | |
|---|---|---|---|---|---|---|---|
| MODEL 1: Predictors measured at baseline and after one month | |||||||
| Demographics | Country | 0.110 | 1.11 | 0.159 | 0.489 | 0.81 | 1.52 |
| Age | 0.018 | 1.01 | 0.018 | 0.311 | 0.98 | 1.05 | |
| Sex | − 0.160 | 0.85 | 0.149 | 0.283 | 0.63 | 1.14 | |
| Treat/Control | Experiment group | − 0.249 | 0.78 | 0.148 | 0.092 | 0.58 | 1.04 |
| Baseline | Number of years smoking | − 0.021 | 0.97 | 0.009 | 0.022 | 0.96 | 0.99 |
| Cigarettes/day | 0.043 | 1.04 | 0.013 | < 0.001 | 1.01 | 1.07 | |
| Minutes before the first cigarette of the day | − 0.258 | 0.77 | 0.075 | < 0.001 | 0.66 | 0.89 | |
| Use other tobacco products | 0.229 | 1.25 | 0.063 | < 0.001 | 1.11 | 1.42 | |
| Use heated tobacco | − 0.225 | 0.79 | 0.314 | 0.473 | 0.43 | 1.47 | |
| Use e-cigarettes | 0.076 | 1.07 | 0.077 | 0.324 | 0.92 | 1.25 | |
| Use nicotine medications | − 0.526 | 0.59 | 0.197 | 0.008 | 0.40 | 0.86 | |
| Being depressed | − 0.400 | 0.67 | 0.138 | 0.004 | 0.51 | 0.87 | |
| Follow-up after 1 month | Use heated tobacco product | − 0.020 | 0.98 | 0.225 | 0.931 | 0.63 | 1.52 |
| Use e-cigarettes | 0.077 | 1.08 | 0.136 | 0.569 | 0.82 | 1.41 | |
| Use nicotine medications | − 0.035 | 0.96 | 0.199 | 0.861 | 0.65 | 1.42 | |
| Current use of any smoking cessation app | − 0.207 | 0.81 | 0.165 | 0.210 | 0.58 | 1.12 | |
| Intention to quit smoking | 0.048 | 1.04 | 0.118 | 0.687 | 0.83 | 1.32 | |
| Perceived helpfulness of the app | 0.302 | 1.35 | 0.091 | < 0.001 | 1.13 | 1.61 | |
| MODEL2: Covariates measured at 6 months | |||||||
| Use heated tobacco | 0.711 | 2.03 | 0.255 | 0.005 | 1.23 | 3.35 | |
| Use e-cigarettes | − 0.054 | 0.94 | 0.114 | 0.634 | 0.75 | 1.18 | |
| Use nicotine medications | 0.559 | 1.74 | 0.194 | 0.004 | 1.19 | 2.55 | |
| Current use of any smoking cessation app | − 0.284 | 0.75 | 0.153 | 0.063 | 0.55 | 1.01 | |
| Perceived helpfulness of the app | 0.240 | 0.78 | 0.082 | 0.004 | 0.66 | 0.92 | |
| Number of different days when the app was accessed (automatically collected) | 0.011 | 1.01 | 0.004 | 0.009 | 1.00 | 1.02 | |
| Number of times the app was opened (automatically collected) | 0.000 | 1.00 | 0.001 | 0.948 | 0.99 | 1.00 | |
| App’s use duration (automatically collected) | 0.002 | 1.00 | 0.001 | 0.040 | 1.00 | 1.01 | |
b = beta coefficient; OR = odds-ratio; SE = standard error; p = p-value; CI = confidence interval
* = significant at least at p < .05