GRADE quality of evidence summary table for the comparisons of multicomponent non-pharmacological interventions with usual care for delirium prevention or treatment.

(a) Allocation concealment not clear in one study (Lundstrom 2007); both studies exposed to performance bias.(b) Unclear blinding of outcome assessor and large confidence interval.(c) Allocation concealment inadequate; unclear blinding of outcome assessor; per-protocol analysis; and large confidence interval.(d) Not randomized, controlled clinical trials.(e) Two studies with unclear/inadequate allocation concealment; 3 studies did not report data on delirium improvement, inconsistency of results (1 study in favor of the experimental treatment and 1 with non-significant results).(f) Two studies with unclear/inadequate allocation concealment; 2 of the 4 studies did not report data on functional status.GRADE quality of evidence summary table for the comparisons of multicomponent non-pharmacological interventions with usual care for delirium prevention or treatment.