Table 3.

Cardiac biomarker levels in rhesus macaques from different housing types (n= 30 per group)

	Cardiac troponin I (ng/mL)	High-sensitivity C-reactive protein (mg/mL)	Creatine phosphokinase-MB (U/L)	Creatine phosphokinase (U/L)	Lactate dehydrogenase (U/L)
Outdoor	0.015 ± 0.018a	3.57 ± 7.89	165.6 ± 46.0	852.5 ± 722.5	357.9 ± 142.3b
Indoor	0.006 ± 0.005	1.73 ± 1.41	146.4 ± 40.9	485.0 ± 409.5	264.7 ± 115.6

Data are shown as mean ± 1 SD for high-sensitivity C-reactive protein, creatine phosphokinase-MB, creatine phosphokinase, and lactate dehydrogenase and as median ± 1 SD for cardiac troponin I.

^aP < 0.001 between the distribution of values for indoor and outdoor rhesus macaques (Mann–Whitney U test).

^bP = 0.025 between values for indoor and outdoor rhesus macaques (Welch t test).