Table 5a:

Comparison^a of candidate models^b by Aikaike Information Criteria (AIC) model selection to predict the age class for 86 male brown bears. Males < 3 years old were classified as immature (N = 42) whereas males ≥3 years old were classified as adult (N = 44). Model M1 is an intercept-only (null) model

Model	Hormone	Time	Study area	Contact method	Interactions	K	AICC	∆AICC	wi	Accuracy (%)
M4	test, prog, est3, cort, cort3	d			(prog × est3), (cort × d)	9	64.87	0.00	0.97	88.4
M6	test, prog, est3 cort, cort3		sa		(prog × est3), (cort × sa), (cort3 × sa)	10	73.59	8.72	0.01	86.1
M5	test, est3			cm	(est3 × cm)	7	74.39	9.52	0.01	84.9
M3	test, prog, est3, cort, cort3				(test × est3), (prog × est3)	8	74.44	9.57	0.01	84.9
M2	test, prog, est3, cort, cort3					6	80.29	15.42	0.00	86.1
M1						1	121.22	56.35	0.00	50.0

^aStatistics are number of estimable parameters in model (K), sample-size-adjusted Akaike information criterion (AIC_C), difference in AIC_C between top model and model i (∆AIC_C), Akaike weight for model i (w_i) and accuracy (%).

^bVariables are testosterone (test), progesterone (prog), estradiol (est), cortisol (cort), ordinal day (d), study area (sa) and contact method (cm).