Table 4. General linear mixed model with CSM score as dependent variable, mean age, mean yearly average temperature, photoperiod and sunset as independent variables.

Source	F-value	Significance
Constant	49.372	<0.001
Mean age	87.136	<0.001
Mean temperature	0.793	0.376
Photoperiod	2.422	0.124
Sunset	12.736	0.001

N = 87 studies.