P-values (P): P ≤ 0.01 indicates very strong presumption against null hypothesis; 0.01 ≤ P ≤ 0.05 indicates strong presumption against null hypothesis; 0.05 ≤ P ≤ 0.1 indicates low presumption against null hypothesis.

Coefficients in bold were included in the final multi-linear regression analysis since they have (very) strong presumption against the null hypothesis.