AICDA and delirium: After PSM, AID was still significantly associated with an increased risk of delirium in both univariate (PSM-adjusted, HR: 1.746; 95% CI: 1.496–2.037 p < 0.001; IPTW-adjusted, HR: 1.588; 95% CI: 1.354–1.862; p < 0.001) and multivariate analyses (PSM-adjusted HR: 2.376; 95% CI: 2.025–2.788; p < 0.001).