From: Polytobacco product use among current cigarette smokers in Hong Kong, China: results from population surveys (2015–17)
Tobacco products
n
% a (95% CI)
Cigar + cigarette
57
6.28 (4.75–8.27)
Self-rolling cigarette + cigarette
5.52 (4.15–7.30)
Waterpipe + cigarette
33
3.77 (2.55–5.56)
Electronic cigarette + cigarette
7
1.05 (0.44–2.50)