Table 1. Characteristics of the study population.

Characteristic	EC users (n = 23)
Males, n (%)	17 (74)
Age, years	40.0 (1.9)
Smoking duration, years	21.5 (1.9)
Smoking consumption, cigarettes per day	33.6 (2.5)
EC use duration, months	18.9 (2.3)
Smoking cessation duration, months	18.2 (2.3)
FTCDsmoking	6.96 (0.40)
FTCDsmoking-modified1	4.70 (0.30)
CDSsmoking	53.26 (1.13)
CDSsmoking-modified1	49.00 (1.02)
FTCD-EC	6.09 (0.32)2
FTCD-EC-modified1	3.91 (0.27)2
CDS-EC	45.13 (1.51)2
CDS-EC-modified1	41.27 (1.46)2

Data are presented as mean (SEM) and number (percentage).

Abbreviations. FTCD, Fagerström Test for Cigarette Dependence; CDS, Cigarette Dependence Scale; EC, electronic cigarette.

¹Score by subtracting the question about cigarette and EC consumption.

²P < 0.05 compared to the respective scores for smoking (paired-samples t-test).