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Table 2 Perioperative phase of anesthesia-related interventions according to the number of studies and patients

From: Anesthesia interventions that alter perioperative mortality: a scoping review

Perioperative phase Number of studies Number of patients
Preoperative 25 6139
Intraoperative 101 24,824
Postoperative 62 20,964
Multiphase (i.e., intervention spanned across 2 or 3 phases) 180 95,119
Not reported 1 280
Total 369 147,326