Table 2.
Predictors of male glucocorticoids (Model 1)
| Term | Estimate | Variance | SE | SD | χ2 | P |
|---|---|---|---|---|---|---|
| Intercept | 10.867 | 0.083 | 17008.6 | <0.001 | ||
| TEST | ||||||
| Rank | 0.494 | 0.168 | 8.6 | 0.003 | ||
| Instability | 0.042 | 0.012 | 12.5 | <0.001 | ||
| Estrous females | 0.176 | 0.013 | 171.4 | <0.001 | ||
| Ripe fruit | −0.012 | 0.073 | 0.03 | 0.873 | ||
| Rank*Instability | 0.122 | 0.044 | 7.8 | 0.005 | ||
| CONTROLS | ||||||
| Age | 0.008 | 0.003 | 8.0 | 0.005 | ||
| Time of day | −0.144 | 0.003 | 2202.5 | <0.001 | ||
| Years to assay | 591.6 | <0.001 | ||||
| 4–6 y | −0.650 | 0.030 | ||||
| 7–9 y | −0.736 | 0.042 | ||||
| Random effects | ||||||
| Chimp ID | 0.016 | 0.125 | 64.6 | <0.001 | ||
| Rank*Chimp ID | 0.364 | 0.603 | 24.4 | <0.001 | ||
| Year of assay | 0.030 | 0.172 | 15.6 | <0.001 | ||
n = 8,029 urine samples, 20 males. Significance of fixed effects was determined via type III Wald chi-square tests. Significance of random effects and interactions was determined via LLRTs.