Table 4.

Risk of cardiac disease in western lowland gorillas (n = 60) was analyzed using binomial generalized linear models (GLMs) with logit links for a baseline model with age and sex only, a model with each allostatic load index only, and a full model with allostatic load and significant variables from the baseline model.

ALI	Allostatic load			Age			Sex			AICc
	P	OR	95% CI	P	OR	95% CI	P	OR	95% CI
Baseline				.052	1.05	1.00-1.11	.0004	10.25	3.06-41.98	71.3
PS1 ALQ	.234	1.19	0.90-1.61							85.3
	.246	1.24	0.87-1.81	.119	1.04	0.99-1.10	.0004	11.57	3.32-51.33	72.2
PS2 ALQ	.609	0.92	0.68-1.25							86.6
	.215	0.78	0.52-1.14	.026	1.06	1.01-1.13	.0004	10.94	3.20-46.07	72.0
PS1 ALM	.953	0.99	0.71-1.38							86.8
	.455	0.85	0.55-1.29	.037	1.06	1.01-1.12	.0004	10.31	3.07-42.36	73.0
PS2 ALM	.478	1.11	0.84-1.48							86.3
	.733	1.06	0.75-1.52	.083	1.05	1.00-1.11	.0004	10.40	3.09-43.11	73.5

Abbreviations: AICc, Akaike’s information criterion, adjusted for small sample size; ALI, allostatic load index; ALM, multimethod approach, allostatic load estimated using primarily 1-tailed quartiles but also some 2-tailed split quartiles (top and bottom 12.5%), depending on the biomarker (eg, cortisol); ALQ, allostatic load estimated using traditional 1-tailed quartiles for each biomarker; CI, confidence intervals; OR, odds ratio; PS1, pooled sample 1, allostatic load estimated at each zoo independently prior to pooling the sample; PS2, pooled sample 2, allostatic load estimated after pooling biomarkers from all locations.

Reference groups: cardiac disease, 1 = had condition; sex, male. The best fit model, as determined by the lowest AICc score, is the baseline model and is in bold.