Table 1.

Study group of rhesus macaques

Study group	Males	Females	Total
Age of monkeys
(human age equivalent)a
Younger NHPs	7	25	32
2 – 9 years
(7 – 29 years)
Middle-age NHPs	7	28	35
10 – 17 years
(32 – 55 years)
Older NHPs	8	26	34
18 – 24 years
(58 – 77 years)
Total	22	79	101
Mean age	13.41	13.15	13.21
St. dev.	7.08	5.41	5.77

^a Equivalent human ages were estimated as a 3.2-fold difference from rhesus macaque ages.