“…We examined various characteristics of the participants measured by the self-reported questionnaires: age; sex; marital status (married and spouse is alive; others); education level (low, ≤ 9 years; middle, 10–12 years; high, ≥ 13 years); living with someone or alone; perceived financial conditions measured by asking, “How do you think about your daily life from a financial viewpoint?” (poor, intermediate, well); engaging in paid work or not; depressive symptoms measured using the 15-item Geriatric Depression Scale (not depressed: ≤4 points, moderately depressed: 5–9 points, severely depressed: ≥10 points) ( Burke et al, 1991 ; Wada, T., Ishine, M., Kita, T., Fujisawa, M., & Matsubayashi, K., 2003 ); Instrumental activities of daily living (IADL) measured using the Tokyo Metropolitan Institute of Gerontology Index of Competence (fully capable: 5 points, less capable: <5 points) ( Koyano et al, 1991 ); self-reported disease diagnoses (stroke, heart diseases, diabetes, respiratory diseases, cancer, and others (hypertension, hyperlipidemia, gastrointestinal diseases, kidney or prostate gland diseases, musculoskeletal diseases, traumatic injury, blood or immune system diseases, depression, dementia, Parkinson’s disease, eye diseases, ear diseases, and other diseases)); providing care measured by asking “Do you look after someone when he/she is sick and confined to a bed for a few days?”; trust in information from media and people that was measured by asking “Which media or people did you refer to the most for taking action during the declaration of a state of emergency?” (TV news programs, TV information programs [an entertaining TV program where celebrities, commentators, or professionals discuss various information], the Internet, government-issued newsletters, family members, friends, and medical staff [multiple answers were allowed]). We selected these covariates, referencing related previous studies ( Bavel et al, 2020 ; Bhuiya et al, 2021 ; Chen et al, 2021 ; Hammad et al, 2021 ).…”