Table 1.

Demographic and clinical characteristics of the study sample

Characteristics	Control (N=29) (Mean±SD)	Patient (N=27) (Mean±SD)			t	P
Gender (Male/Female)	19/10	19/8			Fisher’s exact test	0.779
Age (years)	32.93±7.00	33.26±6.65			−0.180	0.858
Education (years)	11.65±2.61	9.76±2.06			3.002	0.004
		Total	Male (N=19)	Female (N=8)
Age (years)			34.26±4.85	30.88±9.72	0.938	0.374
Education (years)			9.50±1.92	10.38±2.39	−0.919	0.378
Duration of abstinence (months)	N/A	5.75±1.59	6.53±1.06	3.88±0.92	6.150	<0.001
Age of onseta	N/A	26.74±7.25	27.79±6.54	24.25±8.68	1.166	0.255
Duration of drug use (months)	N/A	76.52±44.23	77.42±30.57	74.39±69.68	0.160	0.874
Duration of continuous drug useb (months)	N/A	5.85±12.48	7.09±14.57	2.90±4.28	0.791	0.436
Average dose of MA usec (g)	N/A		0.56±0.35	0.84±0.72	−1.055	0.321

^aAge of onset: age at first time using methamphetamine (MA)

^bDuration of continuous drug use: the duration of the longest time using drug daily

^cAverage dose of MA use: average dose of MA per use in the last one year before abstinence