Table 4 Linear regression results of age at menarche by the geographic latitude.
Number of obs= | 68763 | R-squared= | 0.342 | Â |
|---|---|---|---|---|
F ( 2,288036)= | 17855.41 | Adj R-squared= | 0.342 | Â |
(Prob > F ) | <0.001 | Root MSE= | 0.409 | Â |
Age at menarche | Unstandardized coefficient (B) | P > t | 95% Conf. | Interval |
Latitude | -0.1123787 | <0.001 | -0.1135448 | -0.1112126 |
Latitude^2 | 0.0018579 | <0.001 | 0.0018381 | 0.0018776 |
Constant (Intercept) | 14.07617 | <0.001 | 14.06203 | 14.09031 |