Chen D Q, Jiang Y W, Huang F, Wu X L, Ye Z J, Wu Y, Lu Z Y, Tan J, Feng T J, Xie X
School of Public Health, Sun Yat-sen University (Shenzhen), Shenzhen 518107, China.
Shenzhen Center for Disease Control and Prevention, Shenzhen 518073, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2021 Oct 10;42(10):1900-1906. doi: 10.3760/cma.j.cn112338-20210723-00580.
To assess the impact of vaccination at school and influenza vaccination rates among school-age children on school absenteeism in Shenzhen. The study subjects were primary school students in Shenzhen. School absenteeism panel database from December 2017 to June 2020 of 286 primary schools in Shenzhen was merged with vaccination rates and organizational patterns (., vaccination at school non-school) data of 9 districts in Shenzhen after influenza vaccination for children. The outcome was the number of school absenteeism. The treatment and control groups were distinguished by organizational patterns and district vaccination rates. Difference-in-Difference (DiD) Poisson regressions were used to analyze the effectiveness of vaccination at school and higher vaccination rates. Besides, a robustness test was performed on the regression results. Poisson regression analysis and robustness test of regression results showed that vaccination at school and higher vaccination rates effectively reduced the risk of school absenteeism, with effectiveness against absenteeism of 32.6% (95%: 17.0%-45.3%, <0.01) and 53.0% (95%: 42.1%-61.8%, <0.01), respectively. A free influenza vaccination program for school-age children in Shenzhen and prioritizing school-based vaccination may be an effective measure to reduce the risk of school absenteeism.
评估深圳市在校接种疫苗及学龄儿童流感疫苗接种率对学校缺勤率的影响。研究对象为深圳市的小学生。将深圳市286所小学2017年12月至2020年6月的学校缺勤情况面板数据库与深圳市9个区儿童流感疫苗接种后的接种率及组织模式（即在校接种与非在校接种）数据进行合并。结果指标为学校缺勤人数。治疗组和对照组根据组织模式和地区接种率进行区分。采用双重差分（DiD）泊松回归分析在校接种疫苗及较高接种率的有效性。此外，对回归结果进行了稳健性检验。泊松回归分析及回归结果的稳健性检验表明，在校接种疫苗及较高接种率有效降低了学校缺勤风险，对缺勤的有效性分别为32.6%（95%置信区间：17.0%-45.3%，P<0.01）和53.0%（95%置信区间：42.1%-61.8%，P<0.01）。深圳市为学龄儿童提供免费流感疫苗接种计划并优先考虑在校接种可能是降低学校缺勤风险的有效措施。
