Fig. 1
Correlation between COVID-19 deaths per km2 and social capital-related factors. The sample was categorized into two groups: a, c, e and g refer to 29 countries and the provinces/states of the 8 most populous countries (N = 294), and b, d, f and h refer to only the 8 most populous countries by province/state (N = 265). Red lines are linear predictions of COVID-19 deaths per km2 for each factor of social capital. The 95% confidence intervals of the fitted values are shown in grey (r: correlation coefficient, p: probability value)