Table 3.
The summary of multiple regression analysis based on all independent variables.
| Model summary | COVID-19 infection ratea |
COVID-19 mortality ratea |
||||
|---|---|---|---|---|---|---|
| Correlation (r) | P value | Variance (R2) | Correlation (r) | P value | Variance (R2) | |
| VDD | 0.55 | 0.01 | 0.31 | 0.50 | 0.01 | 0.25 |
| VDD + MA | 0.58 | 0.01 | 0.33 | 0.52 | 0.04 | 0.27 |
| VDD + MA + OB | 0.75 | 0.001 | 0.56 | 0.64 | 0.01 | 0.40 |
| VDD + MA + OB + DM | 0.76 | 0.002 | 0.58 | 0.65 | 0.03 | 0.42 |
| MVD | −0.23 | 0.42 | 0.05 | −0.38 | 0.16 | 0.15 |
| MVD + MA | −0.34 | 0.48 | 0.12 | −0.56 | 0.10 | 0.31 |
| MVD + MA + OB | −0.76 | 0.02 | 0.58 | −0.79 | 0.01 | 0.62 |
| MVD + MA + OB + DM | −0.77 | 0.04 | 0.59 | −0.80 | 0.03 | 0.63 |
a
As of December 31st, 2020; VDD: Vitamin D deficiency; MA: Median age of the population; MVD: Mean vitamin D level; OB: Prevalence of obesity; DM: Prevalence of diabetes mellitus.