Using concentration ratio and circular distribution method to analyze seasonal characteristics of severe fever with thrombocytopenia syndrome in Anhui province, 2011—2017
10.3760/cma.j.cn112866-20200322-00084
- VernacularTitle:应用集中度和圆形分布法分析安徽省2011—2017年发热伴血小板减少综合征的季节分布
- Author:
Boxi LIU
1
;
Lei GONG
;
Dandan SONG
;
Meng ZHU
;
Yuliang ZHU
;
Jiabing WU
Author Information
1. 内蒙古自治区综合疾病预防控制中心业务处应急办，呼和浩特 010031
- Keywords:
Concentration ratio;
Circular distribution;
SFTS;
Seasonal;
Emerging infectious disease
- From:
Chinese Journal of Experimental and Clinical Virology
2020;34(3):252-255
- CountryChina
- Language:Chinese
-
Abstract:
Objective:Concentration ratio and circular distribution were used to descrip the seasonal epidemic features of thrombocytopenia syndrome (SFTS) in Anhui province.Methods:SFTS data were collected via National Notifiable Disease Report System from 2011-2017 in Anhui province. The temporal distribution of SFTS in Anhui province was reviewed, and then the M value was calculated to further present the seasonal morbidity features of it; circular distribution was conducted to obtain SFTS′s circulation and peak period of its morbidity.Results:From 2011-2017, the total case number of SFTS in Anhui province was 1 641, and 67, 67, 85, 239, 283, 507, 393 respectively for each year. The incidence showed an obvious ascending tendency (linear χ2=614.29, P<0.001), with a peak in 2017 (0.83/100 000). The mean angle value was 171.05° ( Z=439.66, P<0.001). Based on this, the peak incidence date was predicted to be June, 21st, with a peak period between 15th April and 27th August. Conclusions:There is an obvious seasonal peak features of SFTS in Anhui province, with a peak period between April and August, which suggests that enhanced prevention protocols should be carried out during the peak period.
