Table 2. Results of secondary analysis for fold-change uric acid.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
Metric		Group	BoutNum	Group * BoutNum	Captivity-only	Low stress	Medium stress	High stress
Uric acid	Fold-change	F3,324 = 4.32	F5,319 = 3.82	F15,322 = 1.59	F5,40 = 3.48	F5,95 = 1.44	F5,85 = 2.66	F5,99 = 1.36
		p = 2.25 × 10 −3	p = 5.26 × 10 −3	p = 0.07	p = 0.01	p = 0.22	p = 0.03	p = 0.24

Note:

Because there was no effect of pre/post-bout on fold-change uric acid in the main model (shown in Table 1), pre/post-bout was removed from the model. The results of a new model, “fold-change uric acid~group * bout num” with bird identity as a random effect, are shown in columns 3–5. Because there was a significant effect of group (and a significant interaction with group), the four treatment groups were split and four independent models were run. These four models were “fold-change uric acid~bout num” with bird identity as a random effect, and the results are down in columns 6–9. Cells that are bolded contain ­p-values less than 0.05.