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Table 2 Summary of validity assessments for RCTs comparing percutaneous dilatational and surgical tracheostomy in critically ill patients

From: Percutaneous dilatational tracheostomy versus surgical tracheostomy in critically ill patients: a systematic review and meta-analysis

Study Allocation concealment Blinding Intention-to-treat analysis Predefined outcomes Baseline Imbalance
Hazard [30] No No Yes Yes No
Crofts [26] No No Yes Yes No
Friedman [28] No No Yes Yes No
Holdgaard [32] Yes No Yes Yes No
Jong Joon [21] No No Yes No No
Gysin [29] No Yes Yes Yes No
Porter [34] Yes No Yes Yes No
Raine [35] Yes No Yes No Yes
Heikkinen [31] No No Yes No No
Freeman [27] Yes No Yes Yes No
Massick [40] Yes No Yes Yes No
Melloni [33] No No Yes Yes No
Sustic [36] No No Yes Yes No
Wu [38] No No No Yes No
Antonelli [25] Yes No Yes Yes No
Tabaee [37] No No Yes Yes No
Silvester [39] Yes Yes Yes Yes No
  1. ICU, intensive care unit; NR, not reported; OT, operating theatre; PDT, percutaneous dilatational tracheostomy; ST, surgical tracheostomy.