Investigation and estimation of the prevalence of drug addicts in Xichang, china.

To use a new method to estimate the prevalence of drug addicts in Xichang for the first time and to suggest that Chinese Center for Disease Control and Prevention should strengthen surveillance and intervention for them.The Capture-Mark-Recapture (CMR) method of 3 correlated sources under the simple random sampling and its formulas detailed in this paper were applied to a survey of issues relevant to drug addicts in Xichang, China.To view half a year as reacquisition time, the prevalence of drug users in Xichang could be 5264 in 2014, accounting for 0.7% of the resident population of the same year.This investigation method and its formulas studied in this paper have both high reliability and high validity, being worthy of promotion in terms of estimating the prevalence of drug addicts in other parts of the world.