The Indian Council of Medical Research (ICMR) did a research in several north eastern states. They provide data in terms of the use of tobacco (chewing and smoking), use of alcohol and opium. I did analysis only for two sets: comparison of the Khimyong, Kharsang and Vijoynagar Circles of Changlang District, and the substance usage among Tangsa and Lisu.
I tried to upload that in this blog but the blog did not display well. So I posted in my blogspot.
Source: Annual Report 1999 – 2000, Indian Council of Medical Research (accessed: Sep 01, 2013). Page 7 – 9.