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. 2010 Jul 20;1(5):873–877. doi: 10.3892/etm.2010.119

Table III.

z-scores for NK cell activity and CD4+, CD8+ and CD4+/CD8+ ratio.

No. z-score
z-score distribution
Mean ± SD Median (min-max) <−1.645 −1.645 to 1.645 >1.645 P-valuea
CD4 23 −1.15±1.90 −1.31 (−5.13 to 3.47) 12 (52.17%) 10 (43.48%) 1 (4.35%) 0.001
CD8 23 −0.90±1.23 −1.10 (−3.02 to 1.43) 7 (30.43%) 15 (65.22%) 1 (4.35%) 0.01
CD4:CD8 23 −0.06±2.13 −0.78 (−2.33 to 7.81) 2 (8.70%) 18 (78.26%) 3 (13.04%) NS
NK cells 23 −0.17±1.85 −1.15 (−2.11 to 4.72) 6 (26.09%) 13 (56.52%) 4 (17.39%) NS
a

Distribution of z-scores in comparison to the normal range for the Polish population [Zeman et al, 1996 (23)].