IFNG and Alzheimer disease: Particularly, circulating monokine induced by gamma interferon (MIG) level was suggestively associated with a higher risk of AD (odds ratio from inverse variance weighted [ORIVW] 1.23; 95% CI 1.06–1.42; pIVW = 0.007) and lower risk of Crohn disease (ORIVW 0.73; 95% CI −0.62 to 0.86; pIVW = 1.3 × 10−4).