Table 1.

Demographic, substance use and psychiatric characteristics of the study samples.

Variable	MA Users (n=39)	Non-MA Users (n=26)	p-value
Demographic Characteristics
Age (years) a	41.6 (8.8)	40.6 (13.8)	0.742
Education (years) a	12.6 (2.2)	13.4 (1.6)	0.104
Sex (% Male)	92%	42%	<0.001
Ethnicity (% Caucasian)	69%	54%	0.209
Substance Use Disordersb
Alcohol dependence	44%	23%	0.090
Cannabis dependence	28%	0%	0.002
Opioid dependence	8%	0%	0.269
Cocaine dependence	36%	8%	0.017
Psychiatric Characteristics
Current Major Depressive Disorder (%)	13%	0%	0.077
Lifetime Major Depressive Disorder (%)	59%	31%	0.026
POMS Total Mood Disturbancec	58.0 (34.0, 90.0)	36.0 (25.3, 56.0)	0.034

Note.

^aMeans (SD);

^bPercent lifetime dependence;

^cMedian (interquartile range).

MA = Methamphetamine; POMS = Profile of Mood States.