Figure 5.

Percentages of C9-positive melanized neurons in different groups of substantia nigra specimens. C9 staining was significantly increased in PD vs. AD specimens. The percentages of C9⁺ melanized neurons in PD and young normal specimens tended to be increased vs. aged normal specimens, but these differences were not significant (p = 0.04 [not significant after adjustment for multiple comparisons] and 0.08, respectively). Data are expressed as means ± SEM. (^ap < 0.05 vs. PD; abbreviations: AD, Alzheimer's disease; AN, aged normal; DLB, dementia with Lewy bodies; PD, Parkinson's disease; YN, young normal)