创新性地使用自控方法来评估COVID-19单价第三剂的减弱有效性:与测试负面设计进行比较
Caroline Korves1, Martin Kulldorff2, Abirami S Balajee1
1White River Junction Veterans Affairs Medical Center, White River Junction, VT, United States.
Vaccine
|August 28, 2025
概括
对于感染者来说,COVID-19 疫苗的有效性在四个月内减弱,但对于住院患者来说,有效性会持续更长时间. 自控方法有效地使用观察数据评估疫苗保护的减弱.
科学领域:
- 流行病学
- 疫苗学
- 公共卫生
背景情况:
- 疫苗有效性的评估受到偏见的挑战.
- 自制的方法可以隐含地调整这些偏见.
研究的目的:
- 评估第三剂单价疫苗的COVID-19疫苗效率减弱的情况.
- 将自控风险区间 (SCRI) 设计与测试负面设计 (TND) 进行比较.
主要方法:
- 在退伍军人卫生管理局的入学者中使用自控风险间隔 (SCRI) 设计.
- 在第三剂后的风险间隔中比较SARS-CoV-2感染和住院情况.
- 使用逻辑回归与时间变化的病毒循环偏移.
- 进行了比较试验负面设计 (TND) 分析.
主要成果:
- 第三剂的短期抗感染效果为47% (SCRI) 和53% (TND).
- 在接种疫苗后12 - 13周,保护显著减弱.
- 感染发生率比率在第20周增加到1. 9
- 对住院的保护缓慢下降,IRR在33-34周达到2. 3.
结论:
- COVID-19 疫苗对医疗护理感染的有效性在四个月内减弱.
- 预防住院的时间比预防感染的时间更长.
- 在观察性研究中,自控方法对于评估衰退的 VE 是有价值的.
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