IL1B and delirium: For IL-1β, no statistical evidence for an association with delirium risk was observed in either the Suhre et al. dataset (OR: 0.94, 95% CI: 0.76–1.16, P = 0.55) or the Sun et al. (OR = 1.02, 95% CI: 0.85–1.21, P = 0.83) dataset in IVW regression (Supplementary Table S4).