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Table 2 The effect of age on CD56bright and CD56dim NK cells

From: Ageing is associated with a decline in peripheral blood CD56bright NK cells

Age

20–40

40–60

60+

N =

25

23

67

CD56 bright μl/blood (+/- SD)

15.64 (+/-12.8)

12.81 (+/-12) ***

8.13 (+/-7.9)****

CD56 bright as % of lymphocytes (+/-SD)

0.76 (+/-0.6)

0.72 (+/-0.6) *

0.50 (+/-0.5) **

CD56 dim μl/blood (+/-SD)

179.3 (+/-135.3)

174.8 (+/-135)

197.7(+/-180.3)

CD56 dim as % of lymphocytes (+/-SD)

8.49 (+/-5.8)

9.86 (+/-7.0)

11.7 (+/-9.3)

  1. Statistical analysis was carried out as described in the Methods; * p = 0.031 between the 40–60 and 60+ age groups, ** p = 0.012 between the 20–40 and 60+ age groups. ***p = 0.03 between the 40–60 and 60+ age groups, ****p = 0.0004 between the 20–40 and 60+ age groups.