. Author manuscript; available in PMC: 2014 Jan 11.

Published in final edited form as: Gen Comp Endocrinol. 2013 Oct 23;195:21–27. doi: 10.1016/j.ygcen.2013.10.004

Table 1.

Summary of the demographic information for the population (A) and longitudinal (B) study animals.

A. Population Study	Total Animal Number	Total Female Number	Total Male Number	Range of Animal Ages	Mean Animal Age
	n = 113-118	n = 93-96	n = 20-22	2-26.7 yrs¹	12 yrs¹
	Age Group Distributions	All Animals	Less than 9 yrs¹	9-17 yrs¹	Greater than 17 yrs¹
		All Animals	n = 43	n = 40	n = 35
		Number of Females^*	n = 31	n = 34	n = 31
		Number of Males^*	n = 12	n = 6	n = 4
B. Longitudinal Study	Total Animal Number	Range of Animal Ages	Mean Age at 1st Collection	Mean Age at 2nd Collection	Mean Difference Between Collections
B. Longitudinal Study	n = 23-27	4.6 to 26.7 yrs¹	9.3 ± 2.9 yrs¹	20.3 ± 3.5 yrs¹	10.71 ± 2.9 yrs¹

Yrs = years

Male and female baboons showed a different response to age in the concentration of TGF-1β; therefore, serum TGF-1β concentration was analyzed separately by gender in the age group analysis.