Table 1.
Outputs from Bayesian generalized linear mixed-models relating plasma cortisol concentrations (ng ml−1) to body mass (g) and resting mass-specific metabolic rate (mW g−1). DIC and conditional R2 are reported, as well as the slopes and intercepts of the relationships with 95% CI.
| model | DIC | slope (95% CI) | intercept (95% CI) | R2 |
|---|---|---|---|---|
| baseline cortisol versus resting metabolic rate | ||||
| metabolic rate + phylogeny | 86.86 | 0.97 (0.36, 1.56) | 3.30 (2.50, 4.18) | 0.55 |
| metabolic rate only | 98.34 | 1.28 (0.75, 1.80) | 3.07 (2.52, 3.62) | 0.49 |
| metabolic rate + covariates | 130.62 | 1.53 (0.63, 2.52) | 5.25 (−0.46,1.18) | 0.49 |
| baseline cortisol versus body mass | ||||
| mass + phylogeny | 162.47 | −0.22 (−0.40, −0.05) | 6.12 (4.19, 7.98) | 0.54 |
| mass only | 164.53 | −0.29 (−0.41, −0.17) | 6.77 (5.56, 8.04) | 0.57 |
| mass + covariates | 185.32 | −0.35 (−0.53, −0.21) | 8.16 (2.45, 10.35) | 0.61 |
| elevated cortisol versus body mass | ||||
| mass + phylogeny | 204.74 | −0.22 (−0.32, −0.12) | 7.26 (6.02, 8.36) | 0.63 |
| mass + covariates | 219.70 | −0.25 (−0.33, −0.18) | 7.72 (5.57, 9.62) | 0.64 |
| mass only | 223.90 | −0.24 (−0.38, −0.15) | 6.99 (4.42, 9.31) | 0.63 |
| elevated cortisol versus baseline cortisol | ||||
| cortisol + phylogeny | 69.39 | 0.57 (0.37, 0.75) | 3.01 (2.04, 3.95) | 0.53 |
| cortisol only | 79.75 | 0.61 (0.53, 0.77) | 2.53 (2.02, 3.02) | 0.47 |