Spatio-temporal clustering analysis of influenza in Ningxia Hui Autonomous Region from 2014 to 2023
MA Ying, ZHANG Wenxia, MA Jinyu, DONG Junqiang, WANG Xiuqin, LI Wenyu, ZHAO Lihua
Ningxia Hui Autonomous Region Center for Disease Control and Prevention (Ningxia Hui Autonomous Region Academy of Preventive Medicine), Yinchuan, Ningxia 750001, China
Abstract：Objective To investigate the spatio-temporal clustering characteristics of influenza in Ningxia Hui Autonomous Region from 2014 to 2023, so as to provide the basis for strengthening influenza prevention and control. Methods Data pertaining to influenza cases reported in Ningxia Hui Autonomous Region from 2014 to 2023 were retrieved from the Infectious Disease Surveillance System of the Chinese Disease Prevention and Control Information System, including age, sex, current residence, onset date, and reporting date. The seasonal incidence of influenza was analyzed using seasonal index. The spatio-temporal clustering characteristics of influenza were identified using spatial autocorrelation analysis and spatio-temporal scan analysis. Results A total of 20 377 influenza cases were reported in Ningxia Hui Autonomous Region from 2014 to 2023, with a male-to-female ratio of 1.15∶1. The majority were children under 15 years, with 10 950 cases accounting for 53.74%. Influenza was highly prevalent in January, February, March, and December, with seasonal indices of 219.06%, 111.00%, 246.65%, and 366.24%, respectively. The average annual reported incidence was 29.55/105, among which Pengyang County, Jinfeng District, Dawukou District, Xiji County, and Litong District had higher average annual reported incidence, at 63.99/105, 55.71/105, 55.70/105, 49.49/105, and 49.04/105, respectively. Spatial autocorrelation analysis showed that in 2023, there was spatial clustering of influenza cases in Ningxia Hui Autonomous Region (Moran's I=0.333, P<0.05), with a high-high cluster in Jingyuan County, while in other years, the distribution of influenza cases was random (all P>0.05). Spatio-temporal scan analysis showed that from 2014 to 2023, there were four space-time clusters in Ningxia Hui Autonomous Region, including one type Ⅰ cluster in Hongsibao District of Wuzhong City, with the clustering period from January 20 to 26, 2014; and three type Ⅱ clusters, mainly in January, February, March and December, covering one area in Shizuishan City, five areas in Guyuan City, one area in Zhongwei City, three areas in Wuzhong City, and four areas in Yinchuan City. Conclusions From 2014 to 2023, children under 15 years were the primary population affected by influenza in Ningxia Hui Autonomous Region, with distinct spatio-temporal distribution characteristics. The peak incidence occurred during the winter and spring seasons, and the main clustering areas were in the southern regions.
马莹, 张文霞, 马金宇, 董军强, 王秀琴, 李文玉, 赵立华. 2014—2023年宁夏流行性感冒时空聚集性分析[J]. 预防医学, 2025, 37(6): 608-611.
MA Ying, ZHANG Wenxia, MA Jinyu, DONG Junqiang, WANG Xiuqin, LI Wenyu, ZHAO Lihua. Spatio-temporal clustering analysis of influenza in Ningxia Hui Autonomous Region from 2014 to 2023. Preventive Medicine, 2025, 37(6): 608-611.
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