SOD1 and Alzheimer disease: Among them, NKRF and ZBTB17 had low inter‐group data heterogeneity (the I2 values of the AD and AS groups were close and both <50%, compared to AD and AS groups), while BEX2, SOD1, UBL5, and ZNHIT3 had high inter‐group data heterogeneity (Figure 2).