Application of local indicators of spatial autocorrelation to analysis of disease cluster

  Objective   To explore application of spatial autocorrelation and local indicators of spatial autocorrelation in disease.

  Methods   Taking the evaluating data of iodine deficiency disorders(IDD)of Sichuan province in 2000, Moran's I statistic and local Moran's I coefficient of level of median of salt iodine were calculated, and the map of local Moran's I was made.

  Results   The Moran's I statistic of salt iodine was 0.2560(P < 0.05), local Moran's I were bigger than 0 in most region. Conclusions On the whole, there was spatial cluster about salt iodine in Sichuan province and from local, and there still were some region whose salt iodine were different from neighboring region.