Table 4.

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.