Associations of different patterns of HTP use and smoking cessation service use with self-reported 7-day PPA at 6 months (multiply imputed data analysis)
| Self-reported 7-day PPA at 6 months, % | Crude PR (95% CI) | P value | Adjusted PR (95% CI)* | P value | |
| Different patterns of HTP use | |||||
| Non-users (n=1040)† | 22.0% | 1 | 1 | ||
| HTP use at baseline only (n=20) | 20.9% | 0.95 (0.33 to 2.77) | 0.93 | 0.94 (0.33 to 2.69) | 0.98 |
| HTP use at 1-month/3-month follow-up only (n=113) | 23.7% | 1.08 (0.69 to 1.68) | 0.75 | 1.00 (0.63 to 1.59) | 0.90 |
| HTP use at baseline and at 1-month/3-month follow-up (persistent use; n=40) | 25.1% | 1.14 (0.57 to 2.28) | 0.72 | 1.14 (0.57 to 2.29) | 0.72 |
| Any use of HTP from baseline to 3-month follow-up‡ | |||||
| No (n=1040) | 22.0% | 1 | 1 | ||
| Yes (n=173) | 23.9% | 1.09 (0.75 to 1.58) | 0.67 | 1.03 (0.70 to 1.53) | 0.87 |
| Smoking cessation service at 3 months | |||||
| No (n=1013) | 19.5% | 1 | 1 | ||
| Yes (n=200) | 36.2% | 1.86 (1.38 to 2.49) | <0.001 | 1.70 (1.26 to 2.30) | <0.001 |
*Adjusted for sex, age, education attainment, employment status, daily cigarette consumption, time to first cigarette of the day, past cigarette quit attempt and intention to quit smoking at baseline
†Include never users and ever HTP user who did not use HTP in the past 7 days at baseline and during follow-up
‡HTP use at baseline or 1-month/3-month follow-up or both
HTP, heated tobacco product; PPA, point-prevalence abstinence; PR, prevalence ratio.