. 2018 Oct 20;15(13):1522–1529. doi: 10.7150/ijms.28442

Table 3.

Respiratory mechanics measured at each time point

	PCV with VG Group (n = 39)	ERV Group (n = 39)	P value
Ppeak (cm H₂O)			0.909^a
T1	14 [13 - 15]	14 [13 - 15]	0.811
T2	28 [26 - 32]	29 [27 - 33]	0.113
T3	27 [25 - 29]	28 [26 - 30]	0.121
T4	17 [16 - 19]	18 [17-19]	0.275
Pplat (cm H₂O)			0.917^a
T1	13 [12 - 14]	13 [12 - 15]	0.859
T2	28 [26 - 30]	29 [26 - 32]	0.262
T3	27 [25 - 29]	27 [24 - 30]	0.369
T4	16 [14 - 17]	16 [14 - 17]	0.895
Pmean (cm H₂O)			0.038^a
T1	4.0 [4.0 - 4.3]	4.0 [4.0 - 4.0]	0.625
T2	9.0 [8.0 - 9.0]	10.0 [9.0 - 11.0]	<0.001
T3	9.0 [7.8 - 9.3]	10.0 [9.0 - 10.0]	0.002
T4	5.0 [4.0 - 5.0]	5.0 [5.0 - 6.0]	0.073
Cstat (mL cm H₂O^-1)			0.203^a
T1	41.2 [37.0 - 45.1]	43.4 [36.7 - 47.4]	0.313
T2	19.2 [17.4 - 21.6]	18.1 [16.4 - 20.9]	0.232
T3	21.0 [18.5 - 22.4]	18.9 [16.8 - 21.0]	0.127
T4	37.0 [32.1 - 39.9]	35.7 [31.0 - 38.9]	0.807
RR (breaths min^-1)			0.015^a
T1	14 [13 - 15]	14 [12 - 14]	0.098
T2	17 [15 - 20]	18 [16 - 20]	0.839
T3	16 [14 - 18]	17 [14 - 19]	0.291
T4	16 [14 - 20]	20 [18 - 20]	0.038

Data are presented as median (interquartile range). PCV with VG, pressure-controlled ventilation with volume guarantee; ERV, 1:1 equal ratio ventilation; Ppeak, peak inspiratory pressure; Pplat, plateau airway pressure; Pmean, mean airway pressure; Cstat, static compliance; RR, respiratory rate. T1, 10 min after anesthesia induction under supine position; T2, 30 min after initiation of carbon dioxide (CO₂) pneumoperitoneum and Trendelenburg position; T3, 60 min after initiation of CO₂ pneumoperitoneum and Trendelenburg position; T4, 10 min after CO₂ desufflation and resuming the supine position. ^aP_{group × time} = P value of the group and time interaction obtained by linear mixed model analysis.