Diaphragm Thickening Fraction as a Prognostic Imaging Marker for Postoperative Pulmonary Complications in Robot-Assisted Laparoscopic Prostatectomy Requiring the Trendelenburg Position and Pneumoperitoneum

Table 3

Preoperative and intraoperative data of the two groups categorized according to the optimal diaphragm TF cut-off value.

Variables	group ()	group ()	value
Age (years)			0.349
Body mass index (kg/m^2)			0.926
ASA physical status			0.598
2	92 (80.7)	27 (87.1)
3	22 (19.3)	4 (12.9)
Hypertension	42 (43.0)	12 (38.7)	0.838
Diabetes mellitus	16 (14.0)	4 (12.9)	>0.999
Cerebrovascular disease	8 (7.0)	2 (6.5)	>0.999
Coronary artery disease	12 (10.5)	2 (6.5)	0.388
COPD	14 (12.3)	5 (16.1)	0.765
Interstitial lung disease	0 (0)	0 (0)	>0.999
Pulmonary tuberculosis	0 (0)	0 (0)	>0.999
Pulmonary function test
FVC (L)			0.731
FEV1 (L)			0.549
FEV1/FVC ratio (%)			0.796
Preinduction hemodynamics
Mean blood pressure (mmHg)			0.173
Systolic blood pressure (mmHg)			0.538
Diastolic blood pressure (mmHg)			0.075
Body temperature (°C)			0.943
Heart rate (beats/min)			0.931
SpO2 (%)			0.140
Arterial blood gas analysis after induction
pH			0.472
PaO2 (mmHg)			0.193
PaCO2 (mmHg)			0.235
HCO3^- (mmol/L)			0.442
Base excess (mmol/L)			0.648
SaO2 (%)			0.709
Arterial blood gas analysis at skin closure
pH			0.460
PaO2 (mmHg)			0.939
PaCO2 (mmHg)			0.093
HCO3^- (mmol/L)			0.625
Base excess (mmol/L)			0.412
SaO2 (%)			0.070
Anesthesia duration (min)			0.200
Operation duration (min)			0.192
Crystalloid amount (mL)			0.766

Continuous variables are presented as , and categorical variables are presented as number (percentage). TF: thickening fraction; ASA: American Society of Anesthesiologists; COPD: chronic obstructive pulmonary disease; FEV₁: forced expiratory volume in the first second; FVC: forced vital capacity; SpO₂: peripheral oxygen saturation; pH: hydrogen ion concentration; PaCO₂: arterial carbon dioxide partial pressure; PaO₂: arterial oxygen partial pressure; HCO₃^-: bicarbonate; SaO₂: arterial oxygen saturation.