Table 3. General linear model of the effects of fertility rate and adult female mortality on the mean age at menarche calculated for 89 countries.

Covariate	Estimate	Standard error	t-value	p-value
Intercept	12.277	0.181	67.673	<0.001
Fertility rate	0.196	0.074	2.651	0.009
Adult female mortality	0.003	0.001	2.209	0.029

AIC = 203.81