Table 1.

Demographic data of participants.

Variable	ND (n = 25)	HC (n = 25)	Test statistic
Mean age (SD)	32.0 (10.3)	30.9 (6.9)	t = 0.421, p = 0.676
Age range	22–59	23–58	–
Education (SD)	14.2 (2.3)	15.0 (2.1)	t = −0.150, p = 0.256
FTND (SD)	7.5 (1.3)	–	–
Handedness (R/M/L)	9/7/9	10/7/8	χ2 = 0.176, p = 0.890
The number of cigarettes smoked per day (SD)	17.5 (1.5)	–	–

ND, Nicotine dependence; HC, Healthy control; SD, Standard deviation; R, Right; M, Mixed; L, Left; FTND, Fagerstrom Test of Nicotine Dependence.