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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.