Figure 2

Network of the comparisons for the Bayesian network meta-analysis. The size of the nodes is proportional to the number of patients (in parentheses) randomly assigned to receive the treatment. The width of the lines is proportional to the number of trials (next to the line) that compare the connected treatments. A/C, assist-control ventilation; A/C + VG, assist-control plus volume-guarantee ventilation; A/C + VG + RM, assist-control plus volume-guarantee ventilation with recruitment maneuver; CMV, continuous mandatory ventilation; HFFIV, high-frequency flow interrupted ventilation; HFJV, high-frequency jet ventilation; HFOV, high-frequency oscillatory ventilation; IMV, intermittent mandatory ventilation; PSV, pressure support ventilation; PSV + VG, pressure support ventilation with volume-guarantee ventilation; PTV, patient-triggered ventilation; SIMV, synchronized intermittent mechanical ventilation; SIMV + PSV, synchronized intermittent mechanical ventilation with pressure support ventilation; SIMV + VG, synchronized intermittent mechanical ventilation with volume-guarantee ventilation; SIPPV + VG, synchronized intermittent positive pressure ventilation plus volume-guarantee ventilation; V-C, volume-controlled (through adjusting the delivered tidal volume).