Table 2 The nCD64 index results of pairwise comparison of age subclass by standard normal deviate test.
From: Reference intervals for peripheral blood neutrophil CD64 index and monocyte HLA-DR in healthy adults
Age groups (year) | F value | P value | Z | Z* | |
|---|---|---|---|---|---|
20–50(n=124) | 51–90(n=145) | 26.881 | <0.001 | 5.225 | 4.775 |
\(Z=\frac{|\overline{\text{X} }1-\overline{\text{X} }2|}{{\left[\left(\frac{{S1}^{2}}{N1}\right)-\left(\frac{{S2}^{2}}{N2}\right)\right]}^\frac{1}{2}},\)\({Z}^{*}=3{\left[\left(N1+N2\right)/240\right]}^\frac{1}{2}.\) (N1≥120, N2≥120) \(\overline{\text{X} }1\) and \(\overline{\text{X} }2\) are the observed means of the two subgroups, S1 and S2 are the observed variances, and N1 and N2 are the number of reference intervals in each subclass, respectively. If the calculated Z exceeds Z*, they recommend partitioning. | |||||
