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Table 1 Draft search strategy for MEDLINE

From: Variables associated with unplanned general adult ICU admission in hospitalised patients: protocol for a systematic review

1. (ICU* OR “intensive care” OR “critical care”).ab,ti.
2. INTENSIVE CARE UNITS/
3. 1 OR 2
4. (admission* OR admitted OR transfer*).ab,ti.
5. (“risk assessment*” OR “risk factor*” OR “risk stratif*” OR predict* OR “increased risk*” OR trigger* OR score* OR scoring OR “early warning”
OR escalat* OR deteriorat* OR triag* OR “vital sign*” OR model* OR validat*).ab,ti.
6. 3 AND 4 AND 5
7. limit 6 to (humans AND yr = “2000 ­Current”)
8. (observational OR “case control*” OR retrospective OR cohort* OR “systematic review*”).ab,ti.
9. OBSERVATIONAL STUDY/
10. CASE­CONTROL STUDIES/
11. RETROSPECTIVE STUDIES/
12. COHORT STUDIES/
13. RANDOMIZED CONTROLLED TRIAL/
14. REVIEW/
15. COMPARATIVE STUDY/
16. PROSPECTIVE STUDIES/
17. VALIDATION STUDIES/
18. 8 OR 9 OR 10 OR 11 OR 12 OR 13 OR 14 OR 15 OR 16 OR 17
19. 7 AND 18
20. (unplanned OR unexpected OR unanticipated OR emergency OR “rapid response”).ab,ti.
21. 19 AND 20