Figure 1: Correlation matrix chart of demographic features.

Entries in the upper triangle correspond to Pearson’s correlation coefficients, and the number of “*” represents the significance level (**p < 10−2, ***p < 10−3).
Entries in the upper triangle correspond to Pearson’s correlation coefficients, and the number of “*” represents the significance level (**p < 10−2, ***p < 10−3).