GRADE quality of evidence summary table for the comparisons of single component non-pharmacological interventions with usual care for delirium prevention.

(a) Allocation concealment not clear; blinding of outcome assessor; Japanese with esophageal cancer (indirectness); more than 20% exclusions; large confidence interval.(b) Unclear number of included patients in final analysis; large confidence interval.(c) Allocation concealment unclear.(d) Inadequate randomization; outcome assessor not blinded; unclear final analysis; significant different at baseline (blood urea nitrogen and creatinine ratio).(e) Inadequate/unclear allocation concealment; outcome assessor not blinded/unclear; results inadequately reported.(f) High risk of selection bias (controlled clinical trial); outcome assessor not blinded; large confidence interval.(g) High risk of selection bias (before-after study); outcome assessor not blinded; differences in baseline characteristics (diabetes, sepsis,…); large confidence intervalGRADE quality of evidence summary table for the comparisons of single component non-pharmacological interventions with usual care for delirium prevention.