Table 1.

CD4:CD8 ratio and serum cortisol (mg/dL) after separation of pair-housed juvenile macaques

	Weeks during separation period
	11 and 12	13 and 14	15–17
CD4:CD8
Changea	0.276	0.245	0.160
Pb	< 0.001	< 0.001	0.001
Serum cortisol
Change	1.52	2.10	3.71
P	0.150	0.080	0.003

^aRelative to baseline value.

^bCompared with baseline value.