SOD1 and early-onset autosomal dominant Alzheimer disease: The first parameter was SOD (mU/mg protein), which was thought to be the best way to diagnose Alzheimer’s disease between the brain cortex and hippocampus because it had the highest F value (10.740%, P = 0.002), and the second was AB1–42 (ng/mg protein) (F = 10.444, P = 0.002).