Abstract:
The objective of the study was to explore the epidemiological trend of dengue fever during 2009-2018 in Phrae Province. The epidemiological trends were analyzed by the descriptive study and K-Means clustering. The results found that the total 5,014 patients were reported with average 501 patients per year. The greatest number of patients found in April to October. Clustering analysis, there are 3 groups of similar trends of dengue fever patients. Cluster 1 average patients 686 persons, Including years 2009, 2012, 2013 and 2018. The dengue cases started increase in April to the maximum in June (203 cases). Cluster 2 in 2015, there was high dengue cases. The peak started in April to the maximum in August with 376 patients. Following that the dengue cases decreased till October. That the trend was similar to trends in cluster 1 which begin in April to June, but longer period, steadily increasing in July to September. Cluster 3 Including years 2010, 2011, 2014, 2016 and 2017, it was found that there was lower dengue (185 patients per year) and the situation showed the late trend of monthly incidence found in May to October. The assessment of spatial variation found that the top two risk of districts including Song and Mueang Phrae, the four medium risk districts were Long, Sung Men, Den Chai and Nhong Muang Khai and the lowed risk district was Rong Kwang Wang Chin district. The result of dengue epidemiological, that is the initial data to monitor, prevent, plan to control the dengue in repetitive area.