Table 3.

Factors associated with e-cigarette product attributes, as well as experiencing undesirable events during e-cigarette use in six European Union member states, 2016

	OR (95% CI) +	p
Use flavors1 (total N=111; yes N=87, no N=24)
Age (years)
18–24	5.54 (1.04–29.66)	0.046
25–39	3.36 (1.08–10.48)	0.038
40–54	18.61 (5.67–61.14)	<0.001
≥55	1.00++
How often currently using e-cigs
Daily	8.82 (2.33–33.39)	0.003
Weekly	2.27 (0.48–10.62)	0.284
Monthly or less	1.00++
E-cig has adjustable power (voltage) or temperature capacity
No	1.00++
Yes	5.64 (2.36–13.47)	<0.001
Experienced dry puff1 (total N=110; yes N=14, no N=96)
Adjustment of power (voltage) or temperature
No	1.00++
Occasionally or regularly	6.01 (2.68–13.46)	<0.001
E-liquid ever spilled during refill2 (total N=64; yes N=12, no N=52)
E-liquid cap child-proof
No, difficult for a child to open	1.00++
Yes, easy for a child to open	6.73 (2.02–22.37)	0.004
Ever mixed e-liquids
No	1.00++
Yes	8.54 (2.29–31.88)	0.004
E-liquid ever leaked during use2 (total N=65; yes N=12, no N=53)
Ever mixed e-liquids
No	1.00++
Yes	7.78 (2.45–24.73)	0.002

⁺Odds Ratio (95% Confidence Interval).

⁺⁺Indicates reference category:

¹using stepwise method with independent variables such as age, gender, highest level of education, difficulty in paying bills, e-cig frequency of use, adjustable power (voltage) or temperature capacity and frequency of adjusting power (voltage) or temperature

²using stepwise method with independent variables such as age, gender, highest level of education, difficulty in paying bills, e-cig frequency of use, adjustable power (voltage) or temperature capacity and frequency of adjusting power (voltage) or temperature, ever mixed e-liquids, volume/capacity of usual e-cig cartridge, tank >2mL, child-proof e-liquid cap and warning labels recommend using gloves.