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Table 5

From: Optimizing search strategies to identify randomized controlled trials in MEDLINE

Appendix 1: Search strategies used  
Appendix 1: Search strategies used  
Phase 1  
RANDOMIZED CONTROLLED TRIAL.pt.  
CONTROLLED CLINICAL TRIAL.pt.  
RANDOMIZED CONTROLLED TRIALS.sh.  
RANDOM ALLOCATION.sh.  
DOUBLE BLIND METHOD.sh.  
SINGLE-BLIND METHOD.sh.  
or/1–6  
(ANIMAL not HUMAN).sh.  
7 not 8  
Phase 2  
RANDOMIZED CONTROLLED TRIAL.pt.  
CONTROLLED CLINICAL TRIAL.pt.  
RANDOMIZED CONTROLLED TRIALS.sh.  
RANDOM ALLOCATION.sh.  
DOUBLE BLIND METHOD.sh.  
SINGLE-BLIND METHOD.sh.  
or/1–6  
(ANIMAL not HUMAN).sh.  
18 or/10–17  
19 18 not 8  
20 19 not 9  
Phase 3  
21 COMPARATIVE STUDY.sh.  
22 exp EVALUATION STUDIES/  
23 FOLLOW UP STUDIES.sh.  
24 PROSPECTIVE STUDIES.sh.  
25 (control$ or prospectiv$ or volunteer$).ti, ab.  
26 or/21–25  
27 26 not 8  
28 27 not (9 or 20)  
29 9 or 20 or 28  
Test Strategies  
All 3 Phases Subject SS and (9 or 20 or 28)
Top 2 Phases Subject SS and (9 or 20)
Crossover Subject SS and (9 or 20 or (crossover.ti, ab. not (ANIMAL not HUMAN).sh.))
CROSS-OVER STUDIES Subject SS and (9 or 20 or (CROSS-OVER-STUDIES.sh. not (ANIMAL not HUMAN).sh.))
Volunteer Subject SS and (9 or 20 or (volunteer.ti, ab. not (ANIMAL not HUMAN).sh.))
Versus Subject SS and (9 or 20 or (versus.ti, ab. not (ANIMAL not HUMAN).sh.))
  1. Subject SS is Subject search strategy, as presented in the review