Table 1.

Measurement of T and B cell parameters in young and elderly volunteers.

	CD4+ T cells GMN (95% CI)	CD8+ T cells GMN (95% CI)	B cells GMN (95% CI)	Total IgG GMC (95% CI)
Normal Range	430 – 1185	180 – 865	25 – 285	591–1540
Young	879 (758–1000)	573 (487–659)	235 (156–314)	838 (757–919)
Elderly	817 (692–942)	396 (303–489)	164 (93–235)	993 (956–1030)

GMC = geometric mean concentration (ug/ml), GMN geometric mean number per ml. There was no significant difference (P>0.05) between young and elderly for all values.