Ukai Tomohiko, Kasamatsu Ayu, Tabuchi Takahiro
Epidemiology and Clinical Research, Research Institute of Tuberculosis, Kiyose, JPN.
Division of Molecular Epidemiology, Jikei University School of Medicine, Tokyo, JPN.
Cureus. 2024 Aug 2;16(8):e66035. doi: 10.7759/cureus.66035. eCollection 2024 Aug.
An association has been reported between political affiliations and vaccination worldwide. In Japan, a significant proportion of the population are non-partisans, and major political parties advocate COVID-19 vaccination. The association between supporting political parties and COVID-19 vaccination coverage in Japan remains unclear. This study aims to investigate the relationship between political party affiliation and COVID-19 vaccination status in Japan. Methods: This study utilized data from large-scale nationwide internet surveys conducted in Japan in 2022, with a sample size of 21,162 participants. The surveys collected information on participants' COVID-19 vaccination status and political party affiliation. The political parties included in the analysis were the Liberal Democratic Party, the Constitutional Democratic Party, the Komeito, the Japanese Communist Party, the Japan Innovation Party (Nippon Ishin no Kai), and the Reiwa Shinsengumi, as well as non-partisans. Logistic regression analysis was performed to examine the relationship between political partisanship and COVID-19 vaccine status. The analysis controlled for potential confounding variables such as age, gender, socioeconomic status, and geographic location.
The odds of being unvaccinated were lower for supporters of large political groups (e.g. Liberal Democratic Party {OR 0.6; 95% CI, 0.5-0.7}), while higher for small political groups (e.g. Reiwa Shinsengumi {OR 2.6; 95% CI, 1.9-3.6}), in comparison with non-partisan.
Political affiliation may be associated with vaccination disparities in Japan. Supporters of minor parties were more likely to be unvaccinated than those of the larger parties. However, this study has several limitations, including self-reporting bias and selection bias due to the Internet survey methodology.
据报道，全球范围内政治派别与疫苗接种之间存在关联。在日本，很大一部分人口无党派倾向，主要政党也倡导新冠病毒疫苗接种。在日本，支持政党与新冠病毒疫苗接种覆盖率之间的关联尚不清楚。本研究旨在调查日本政党归属与新冠病毒疫苗接种状况之间的关系。
本研究利用了2022年在日本进行的大规模全国性网络调查数据，样本量为21162名参与者。调查收集了参与者的新冠病毒疫苗接种状况和政党归属信息。分析中纳入的政党有自由民主党、立宪民主党、公明党、日本共产党、日本维新会和令和新选组，以及无党派人士。进行逻辑回归分析以检验政治党派倾向与新冠病毒疫苗接种状况之间的关系。分析控制了年龄、性别、社会经济地位和地理位置等潜在混杂变量。
与无党派人士相比，大型政治团体（如自由民主党{比值比0.6；95%置信区间，0.5 - 0.7}）的支持者未接种疫苗的几率较低，而小型政治团体（如令和新选组{比值比2.6；95%置信区间，1.9 - 3.6}）的支持者未接种疫苗的几率较高。
在日本，政治归属可能与疫苗接种差异有关。小党派的支持者比大党派的支持者更有可能未接种疫苗。然而，本研究存在一些局限性，包括自我报告偏差和因网络调查方法导致的选择偏差。
