Table 1 shows the respondents’ characteristics by country. The proportions of respondents who answered that he/she wore a mask (at the time of survey) were above 85% in three Asian countries and Italy, compared with 73.3% and 27.6% in the UK and US, respectively. Over 90% of respondents washed their hands/used hand sanitizer in all countries except for Japan. Finally, the proportions of respondents who avoided social gatherings ranged from 81.5% in the US to 92.6% in Japan.
Table 2 shows the associations between public perceptions, personal characteristics, and wearing a mask by country. Lower odds ratios (ORs) were observed with a 1% increment of perceived susceptibility in China (OR, 0.97; 95% confidence interval [CI], 0.96–0.99) and Korea (OR, 0.97; 95% CI, 0.96–0.99). In the US, high perceived severity was associated with wearing a mask (OR, 1.01; 95% CI, 1.00–1.01). Except for China, those who perceived that wearing a mask was extremely effective had higher ORs in Italy (OR, 4.78; 95% CI, 2.36–9.44), Japan (OR, 4.69; 95% CI, 1.95–11.58), Korea (OR, 8.03; 95% CI, 1.49–46.43), the UK (OR, 18.71; 95% CI, 8.54–45.83), and the US (OR, 5.87; 95% CI, 3.04–11.51). Older people were more likely to wear a mask in Japan (OR, 2.01; 95% CI, 1.12–3.73) and the US (OR, 1.50; 95% CI, 1.03–2.22), whereas the inverse association was observed in the UK (OR, 0.43; 95% CI, 0.22–0.81). Male participants were less likely to wear a mask only in Japan (OR, 0.30; 95% CI, 0.18–0.49). Those who lived in urban areas had high ORs in the UK (OR, 1.67; 95% CI, 1.12–2.48) and the US (OR, 1.46; 95% CI, 1.04–2.07). The participants in the fifth income quintile were more likely to wear a mask in China (OR, 3.82; 95% CI, 1.47–10.71), Korea (OR, 13.1; 95% CI, 3.41–87.04), and the US (OR, 3.49; 95% CI, 2.01–6.15). Feeling anxiety was positively associated with wearing a mask in Japan (OR, 2.12; 95% CI, 1.30–3.51), the UK (OR, 1.48; 95% CI, 1.01–2.18), and the US (OR, 1.64; 95% CI, 1.18–2.28).
Table 3 shows the associations between public perceptions, personal characteristics, and handwashing/using hand sanitizers by country. Inverse associations were observed between hand sanitizing and perceived susceptibility in China (OR, 0.98; 95% CI, 0.96–0.99) and Korea (OR, 0.97; 95% CI, 0.95–0.99). Those who had higher perceived effectiveness were more likely to wash their hands in Italy (OR, 9.84; 95% CI, 1.59–57.19), Japan (OR, 5.09; 95% CI, 1.10–26.53), Korea (OR, 13.22; 95% CI, 1.32–139.34), and the US (OR, 7.80; 95% CI, 1.31–42.74). In line with wearing a mask, older people were more likely to wash their hands in Japan (OR, 1.93; 95% CI, 1.64–10.11) and the US (OR, 5.86; 95% CI, 1.38–35.72). In Japan only, male respondents were less likely to wash their hands (OR, 0.45; 95% CI, 0.23–0.86). Those who lived in urban areas had lower ORs for hand sanitizing in Korea (OR, 0.39; 95% CI, 0.17–0.84), and those who lived alone were less likely to wash their hands in Japan (OR, 0.43; 95% CI, 0.22–0.84). Feeling anxiety was positively associated with washing hands in China only (OR, 2.41; 95% CI, 1.28–4.70).
Table 4 shows the associations between public perceptions, personal characteristics, and avoiding social gatherings in the six different countries. Perceived susceptibility was inversely associated with avoiding social gatherings in China (OR, 0.97; 95% CI, 0.96–0.98), Japan (OR, 0.97; 95% CI, 0.96–0.99), Korea (OR, 0.97; 95% CI, 0.96–0.99), and the US (OR, 0.98; 95% CI, 0.97–0.99). Participants with high perceived severity in China were more likely to avoid social gatherings (OR, 1.03, 95% CI, 1.02–1.04), whereas an inverse association was observed in the UK (OR, 0.99; 95% CI, 0.98–1.00). Those who had higher perceived effectiveness were more likely to avoid social gatherings in China (OR, 3.52; 95% CI, 1.12–10.07), Italy (OR, 4.37; 95% CI, 1.31–13.25), Korea (OR, 7.97; 95% CI, 1.68–35.51), the UK (OR, 7.07; 95% CI, 1.85–25.60), and the US (OR, 7.89; 95% CI, 2.82–22.30), but not in Japan. Older people tended to avoid social gatherings in China (OR, 3.14; 95% CI, 1.31–8.25). Male participants were less likely to avoid social gatherings in Japan (OR, 0.26; 95% CI, 0.12–0.53) and the US (OR, 0.51; 95% CI, 0.32–0.81). Although those who lived in urban areas were more likely to avoid social gatherings in Korea (OR, 1.93; 95% CI, 1.19–3.14), an inverse association was found in the UK (OR, 0.49; 95% CI, 0.29–0.83). Participants with higher incomes were more likely to avoid social gatherings in Japan (OR, 4.46; 95% CI, 1.29–15.99). Feeling anxiety was associated with avoiding social gatherings in the UK (OR, 1.74; 95% CI, 1.02–3.00).
Table 5 shows the associations between behavioral changes and the three preventive measures. Those who changed their behaviors because of recommendations from doctors were more likely to wear a mask in China (OR: 2.54, 95% CI: 1.34–4.93), Italy (OR: 2.22, 95% CI: 1.46–3.39), Japan (OR: 4.10, 95% CI: 1.80–10.78), and the US (OR: 2.05, 95% CI: 1.47–2.85). The same positive association was observed with handwashing/using hand sanitizers in China (OR: 2.49, 95% CI: 1.28–4.94) and Korea (OR: 4.14, 95% CI: 1.17–20.99), and with avoiding social gatherings in Italy (OR: 1.78, 95% CI: 1.01–3.15), Korea (OR: 2.33, 95% CI: 1.21–4.69) and the US (OR: 2.49, 95% CI: 1.59–3.94). Statistically significant associations were observed only between behavioral changes triggered by politicians and wearing masks in the US (OR: 1.78, 95% CI: 1.24–2.58) and avoiding social gatherings in the UK (OR: 2.34, 95% CI: 1.35–4.11). Japan was the only country in which a statistically significant positive association was observed between behavioral changes triggered by conformity (OR: 8.55, 95% CI: 2.21–58.2) and recommendations by family members to wear a mask (OR: 4.50, 95% CI: 1.39–20.94).