Table 1 shows demographics and comorbid diagnoses for Thai and Thai-Chinese males (n = 413; 53%) and females (n = 369; 47%). Females were older (27.7±7.1 vs. 25.8±6.4, t=-3.9, p<0.001), less likely to be married (9.2% vs. 22.3%, χ22=30.9, p<0.001) and employed (9.8% vs. 47.5%, χ21=132.8, p<0.001) and had fewer years of education (7.6±2.8 vs. 8.5±2.8, t=4.5, p=0.03) than male MA-users. Regarding comorbidity, males were more likely to have ASPD than female participants (17.9% vs. 6.2%, χ21=24.5, p<0.001). However, history of conduct disorder, alcohol and nicotine dependence did not differ between the two groups.