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To understand the epidemiological characteristics of chickenpox-related absenteeism among primary and secondary school students in Huai’an city, providing reference for further improving chickenpox prevention and control in schools.
Descriptive epidemiological methods were employed to analyze data on chickenpox-related absenteeism collected from the Jiangsu Provincial Student Health Monitoring System for the 2018 to 2022 academic years. The circular distribution method was used to analyze the seasonal characteristics of absenteeism due to chickenpox.
The average annual rate of chickenpox-related absenteeism among primary and secondary school students in Huai’an city from 2018 to 2022 was 26.23 per 100 000. The absenteeism rates varied between 11.96 (2021 academic year) and 70.84 (2020 academic year) (χ2=101 240.39, P < 0.01), with an average of 3.98 days absent per student. The absenteeism rate for boys was higher than that for girls (27.06 vs. 25.26, χ2=166.19, P < 0.01). Among different school types, the average absenteeism rate ranged from 4.30 (vocational high schools) to 39.97 (primary schools), with urban students exhibiting a higher average absenteeism rate compared to those in suburban areas (30.84 vs. 17.10, χ2=9 519.78, P < 0.01). A primary peak in absenteeism occurred from October to December in the first semester, while a secondary peak was observed from April to June in the second semester. Circular distribution method analysis revealed a significant seasonal concentration trend, with peak days occurring on November 26 and May 18, and peak periods spanning from October 29 to December 25 and from April 9 to June 26, respectively (Z values of 48 673.79 and 217.29, with P values < 0.01).
The rate of chickenpox-related absenteeism among primary and secondary school students in Huai’an city is relatively high. Monitoring should focus on boys, primary schools, urban areas, and the two peak periods (October-December and April-June). The circular distribution method for analyzing seasonal characteristics of absenteeism due to chickenpox demonstrates good practicality and can provide data support for chickenpox prevention and control in schools.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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