Table 1 Control and subject demographics, historical conventional cigarette use description, and current e-cigarette use behaviors.

From: Comparison of Bladder Carcinogens in the Urine of E-cigarette Users Versus Non E-cigarette Using Controls

E-cigarette Control & Subject Demographics

Control Characteristic (n = 10)

Result

Age

30.1 +/− 7.7

Gender (% male)

50.0%

E-cigarettes Subject Characteristic (n = 13)

Result

Age

39.4 + /− 13.5

Gender (% male)

69.2%

Duration of conventional cigarette Use (yrs)

19.9 +/− 11.9

Packs per day when smoking

1.3 +/− 0.4

Time since last conventional cigarette use (mo)

19.9 +/− 14.9

Duration of e-cigarette use (mo)

26 +/− 11.3

Frequency of e-cigarette use - % > 28 per week

84.6%

E-cigarette nicotine concentration (mg/ml)

6.8