Table 4

Linear regression results of age at menarche by the geographic latitude.

Number of obs=
68763
R-squared=
0.342

F (2,288036)=
17855.41
Adj R-squared=
0.342

(Prob > F)
<0.001
Root MSE=
0.409


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

Grivas et al. Scoliosis 2006 1:9   doi:10.1186/1748-7161-1-9