Table 3. Intraoperative monitoring of patients treated with protective ventilation (PV) and conventional ventilation (CV).

	CV group (n=57)	PV group (n=58)	P value
Operation time (min)	301.34±54.27	298.95±65.76	0.21
Mechanical ventilation time (min)	320.77±65.22	323.25±70.83	0.85
Tidal volume, mL	535.64±59.18	440.64±55.37	<0.001
RR, breaths/min	12.59±0.93	13.54±1.13	<0.001
Crystalloids volume, mL	1608.97±391.39	1648.65±341.35	0.63
Colloids volume, mL	519.23±87.42	543.705±123.59	0.31
Blood loss, mL	82.82±57.38	79.25±47.87	0.76
Urine output, mL	382.05±171.15	346.25±134.81	0.21
Postoperative hospital stay, days	11.2±3.3	12.6±4.1	0.88
Death rate at 30 days after surgery, %	0	0	1

RR: respiratory rate. Data are reported as means±SD (chi-squared test or t-test).