| Health variables | Coefficients | SE | p values | Adjusted r2 |
| Intercept | 0.967 | 0.092 | 0.000 | 0.007 |
| Dummy 1 (Red) | −0.021 | 0.098 | 0.832 | |
| Dummy 2 (Green) | 0.064 | 0.106 | 0.550 | |
| Carbon variables | Coefficients | SE | p values | Adjusted r2 |
| Intercept | 0.903 | 0.040 | 0.000 | 0.017 |
| Dummy 1 (Red) | 0.131 | 0.072 | 0.068 | |
| Dummy 2 (Green) | 0.109 | 0.059 | 0.064 |