若年層のワクチン忌避、社会的孤立より“孤独感”が影響~都内大学生を対象とした調査で孤独感がワクチン接種の心理的障壁となることを実証~

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2025-06-03 東京科学大学

若年層のワクチン忌避、社会的孤立より“孤独感”が影響~都内大学生を対象とした調査で孤独感がワクチン接種の心理的障壁となることを実証~

東京科学大学(Science Tokyo)大学院医歯学総合研究科の後藤夕輝助教らの研究チームは、都内4大学の学生約3,000名を対象にした調査で、「孤独感」が新型コロナワクチン接種をためらう主な心理的リスク因子であることを明らかにしました。一方、「社会的孤立」とワクチン忌避との間には明確な関連は見られませんでした。孤独感を抱える学生は、そうでない学生に比べて約2倍の確率でワクチン接種をためらう傾向がありました。この研究成果は、2025年5月21日付で国際科学誌『Scientific Reports』に掲載されました。

<関連情報>

東京の大学生におけるCOVID-19ワクチン接種躊躇の危険因子は孤独であるが社会的孤立ではない Loneliness, but not social isolation, is a risk factor for COVID-19 vaccine hesitancy in university students in Tokyo, Japan

Yuki Goto,Nobutoshi Nawa,Toshihide Nakayama,Motohiro Sato,Isao Satoh,Hajime Nitta,Shusho Okada,Kenji Wakabayashi & Takeo Fujiwara
Scientific Reports  Published:21 May 2025
DOI:https://doi.org/10.1038/s41598-025-01110-2

Abstract

During the COVID-19 pandemic, social isolation, especially among university students, was a significant problem due to limited campus visits. This social environment could influence COVID-19 vaccine hesitancy because of a lack of accurate information or fear of novel behaviors resulting from loneliness. This study examined the association of social isolation and loneliness with vaccine hesitancy among university students in Tokyo. An online questionnaire was administered to all students at the Union of Four Universities in Tokyo in March 2022. Respondents were asked about their vaccination frequency, social isolation, loneliness, and other covariates including mental health. Vaccine hesitant were defined as those who had never been vaccinated or had been vaccinated only once during the third vaccination period. Logistic regression analysis was performed. Of the 2,907 students, 1,080 (37.2%) were socially isolated, 480 (16.5%) felt lonely and 113 (3.9%) were vaccine hesitant. Lonely students hesitated vaccine 2.08 times more than non-lonely students (95% CI: 1.25–3.44), which was not true for social isolation (OR: 1.07, 95% CI: 0.69–1.65). Loneliness, but not social isolation, was associated with vaccine hesitancy among university students in Tokyo. These findings can be used to plan vaccination programs for adolescents and young adults against future pandemics.

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