TABLE 2.

Differences in T-cell subsets between healthy old subjects and young control subjects

T-cell subset	old subjects	young controls
CD4	72 ± 9.2*	63 ± 7.4
CD8	24 ± 8.4*	32 ± 7.6
CD161	52 ± 16	52 ± 17
CD3+4−8−	2.4 ± 0.6**	4.7 ± 1.8
CD4+FOXP3+a	6.0 ± 0.3**	4.0 ± 0.3

Values are the means ± sd of the results of analyses of T cells from 20 healthy old subjects (9 male, 11 female) and their concurrently studied young controls. Values are expressed as the percentage of total CD3⁺ T cells. ^aAnalyses encompassed only 15 of the subject pairs (9 males, 6 females). 

^*P < 0.01, 

^**P < 0.001 vs. controls; 2-sample t test.