PER3 VNTR variant and susceptibility to smoking status/substance use disorder in a Turkish population

Abstract Background Substance use and smoking exert devastating impact on sleep, especially hindering the ease of falling asleep, compromising the sleep maintenance, and distorting the sleep cycles. PERIOD genes are believed to play a role in individual differences in sleep timing by influencing circadian. Objective The aim of this study was to ascertain whether Per3 VNTR variant affects suspectibility of individuals to substance use disorder (SUD) and smoking status in a Turkish population. Methods A total of 549 subjects, including 212 SUD patients, 160 smoker, and 177 healthy controls...