Spatial-temporal distribution of hepatitis B in Gannan Tibetan autonomous prefecture of Gansu, 2012–2017

ObjectiveTo analyze the spatial-temporal distribution of hepatitis B in Gannan Tibetan autonomous prefecture of Gansu province and provide evidence for the prevention and control of hepatitis B.

MethodsThe incidence data of hepatitis B in Gannan from 2012 to 2017 was used to calculate the global Moran’s I and local G statistics and analyze its spatial-temporal distribution characteristics.

ResultsThe incidence of hepatitis B showed spatial autocorrelation（P＜0.05）from 2012 to 2017, and local autocorrelation analysis indicated that the hot spots areas identified were mainly in some townships of Xiahe, Luqu, Maqu, Zhuoni and Hezuo, while the cold spots areas were mainly in some townships of Zhouqu, Diebu, Zhuoni, Lintan and Hezuo. Spatial-temporal analysis showed that the most likely clustering areas of incidence of hepatitis B were in some townships of Xiahe during 2012–2014 (RR＝3.50, LLR＝219.24, P＜0.001) and some townships in Luqu in 2016 (RR＝6.91, LLR＝198.61, P＜0.001）, followed by some townships of Lintan and Zhuoni during 2012–2013 (RR＝1.79, LLR＝70.41, P＜0.001).

ConclusionThe incidence of hepatitis B showed spatial and spatial-temporal clustering in Gannan from 2012 to 2017. Targeted prevention and control measures should be taken according to the spatial distribution of the disease.