Linear regression analysis of factors affecting the total time of snus use per day
| Predictive factor | Effect of daily total exposure time in min (hours) | 95% CI in min | P value* |
| Duration of snus use† | 46 (0.8) | 29 to 643 | <0.001 |
| Age of respondent‡ | −25 (−0.4) | −47 to −3 | 0.026 |
| Comprehensive school (reference) | 0 | ||
| Vocational school | −36 (−0.6) | −155 to 84 | 0.556 |
| Upper secondary education | −141 (−2.4) | −272 to −9 | 0.036 |
| Never regularly smoked (reference) | 0 | ||
| Daily smoker | −78 (−1.3) | −150 to −6 | 0.033 |
| Occasional smoker | 72 (1.2) | −1 to 145 | 0.054 |
| Former smoker | 45 (0.75) | −26 to 117 | 0.211 |
| Snus perceived as harmless (reference) | 0 | ||
| Perceived neither as harmless nor harmful | −59 (−1.0) | −135 to 16 | 0.123 |
| Perceived as very harmful | −85 (−1.4) | −159 to −11 | 0.025 |
The number of participants: n=308. Negative effect in minutes refers to factors decreasing the total use time. Positive effect in minutes refers to factors increasing it compared with the reference (0 min).
*P value provided by Wald test.
†Each additional year of snus use increased the daily total exposure time by 46 min.
‡Each additional year of the respondent’s age decreased the daily total exposure time by 25 min. Snus use was less common among the older respondents.