Funnel plot for volatile anesthetics (VA) versus total intravenous anesthetics (TIVA) including propofol on 1-yr mortality in adults undergoing cardiac surgery with cardiopulmonary bypass (CPB). Subgroup analysis shows studies comparing volatile anesthetics with TIVA including propofol, versus studies comparing volatile anesthetics plus TIVA including propofol for induction and in CPB versus TIVA including propofol. M-H, Mantel–Haenszel.