marginally statistically significantP = 0.077
When we analyzed a simple relationship between HTLV‐1 positive rate and the population density of residential area at municipal level using a simple linear correlation, overall there were weak‐negative linear correlations between the two factors (Supporting Information Figure S1D‐F); in particularly in male (Supporting Information Figure S1E), the relationship was marginally statistically significant ( P = 0.077). 4.