No.Search terms
S11(s10 or s9 or s8 or s7 or s6 or s5 or s4 or s3 or s2 or s1)
S10control* or prospective* or volunteer*
S9(mh “quantitative studies”)
S8(mh “placebos”)
S7(mh “random assignment”)
S6random* or placebo*
S5(singl* n25 mask*) or (doubl* n25 mask*) or (trebl* n25 mask*) or (tripl* n25 mask*)
S4(singl* n25 blind*) or (doubl* n25 blind*) or (trebl* n25 blind*) or (tripl* n25 blind*)
S3(clin* n25 trial*)
S2pt clinical trial
S1(mh “clinical trials+”)

From: Appendix C, Clinical questions and literature search

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Delirium: Diagnosis, Prevention and Management [Internet].
NICE Clinical Guidelines, No. 103.
National Clinical Guideline Centre (UK).
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