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. 2020 Dec 29;10(12):e040683. doi: 10.1136/bmjopen-2020-040683

Table 2.

E-cigarette use at the age of 19 years in relation to smoking, use of snus and parental tobacco use at age 14–15 years*

Ever tried/used e-cigarettes Current e-cigarette use
n % P value n % P value
Smoking at age 14–15 years
 Never 364/1910 19.1 61/1910 3.2
 Occasionally 50/147 34.0 11/147 7.5
 Daily 39/64 60.9 <0.001 18/64 28.1 <0.001
Use of snus at age 14–15 years
 Never 405/2035 19.9 76/2035 3.7
 Occasionally 16/28 57.1 5/28 17.9
 Daily 31/61 50.8 <0.001 9/61 14.8 <0.001
Parental smoking at age 14–15 years
 Father smoker, no 374/1835 20.4 69/1835 3.8
        yes 72/253 28.5 0.003 20/253 7.9 0.002
 Mother smoker, no 368/1832 20.1 73/1832 4.0
        yes 76/256 29.7 <0.001 16/256 6.3 0.093

*Individuals with missing answers in the individual questions about tobacco use and e-cigarette use were excluded from the analysis.

e-cigarette, electronic cigarette.