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Table 1 Demographic characteristics of the three study groups (N = 105)

From: A comparison of electrocardiographic parameters in e-cigarette users, conventional cigarette smokers, and non-smokers

Demographic characteristics

Group 1 (n = 35)

Group 2 (n = 35)

Group 3 (n = 35)

p value

Age

 • ≤ 20 years

6 (17%)

2 (6%)

2 (6%)

0.2$

 • > 20–40 years

27 (77%)

29 (83%)

27 (77%)

 • > 40 years

2 (6%)

4 (11%)

6 (17%)

Gender, (females/males %)

12/23 (34/66%)

13/22 (37/63%)

14/21 (40/60%)

0.962x

Scholastic attainment (middle/high)

13/22

8/27

12/23

0.422x

  1. Group 1: Electronic cigarette users
  2. Group 2: Conventional cigarette smokers
  3. Group 3: Non-smokers control group
  4. $One-way ANOVA
  5. xChi-square test