highly significantP = 0.003
The number of cells with MPO ir in the frontal cortex was significantly increased in AD cases (means ± SEM 8.46 ± 0.81, n = 25) compared with control cases (5.08 ± 0.62, n = 20), leading to a highly significant difference in the two-tailed t -test ( P = 0.003, t = 3.17, df = 43; Fig. 3 a).