Table 4.
Results of OLS regression and values of the Variance inflation factor (VIF).
| Longevity Indicators | Environmental Variables | Coefficient | t | p Value | VIF |
|---|---|---|---|---|---|
| Centenarian Ratio | There are no statistically significant variables | ||||
| Climate (temperate-transitional) | 0.08 | 0.09 | 0.92 | 1.31 | |
| Model 1. Aging tendency |
UNESCO buffer zone | −4.60 | −4.18 | 0.006 | 1.08 |
| Non coastal area | 1.37 | 1.06 | 0.29 | 1.27 | |
| Climate (temperate-transitional) | 0.24 | 0.78 | 0.43 | 1.31 | |
| Model 2. 85+ ratio |
UNESCO buffer zone | −1.33 | −3.46 | 0.008 | 1.08 |
| Non coastal area | 0.88 | 1.95 | 0.05 | 1.27 | |
| Altitude (hill-mountain) | 0.09 | 0.06 | 0.94 | 1.26 | |
| Model 3. 90+ ratio |
UNESCO buffer zone | −0.60 | −3.39 | 0.010 | 1.09 |
| Non coastal area | 0.51 | 2.49 | 0.014 | 1.21 | |
| Altitude (hill-mountain) | 0.73 | 2.68 | 0.009 | 1.87 | |
| Model 4. Longevity index |
UNESCO buffer zone | −0.98 | −1.73 | 0.08 | 1.03 |
| Non coastal area | 1.56 | 2.53 | 0.012 | 1.03 | |
| Centenarity Index | There are no statistically significant variables | ||||
Note: Significance p value < 0.05; VIF: variance inflation factor.