Table 4.

Multivariable analysis of predictors for overall morbidity

Estimated factors	OR	95% CI	P-value
Age (per 1-year increase)	1.004	0.98–1.02	0.72
Gender (male vs female)	1.24	0.79–1.93	0.35
Body mass index (kg/m2) (per unit decrease)	1.04	0.991–1.10	0.11
FEV1% (per unit decrease)	1.01	1.00–1.03	0.054
FEV1/FVC (%) (per unit decrease)	1.004	0.98–1.03	0.75
Systemic inflammation score (2 vs 0–1)	1.73	1.11–2.71	0.016
Neutrophil-to-lymphocyte ratio (per unit increase)	0.99	0.89–1.10	0.79
Platelet-to-lymphocyte ratio (per unit increase)	1.002	0.998–1.006	0.38
Hemoglobin (g/dL) (per unit decrease)	1.007	0.997–1.02	0.17
Smoking history	1.49	0.97–2.31	0.071
Respiratory comorbidity	2.13	1.56–2.91	<0.001
Cardio-cerebrovascular comorbidity	1.18	0.85–1.64	0.33
Right upper lobectomy	1.32	0.96–1.81	0.087
Pulmonary fissure completeness (incomplete vs complete)	1.69	1.25–2.29	0.001
Dense pleural adhesion (present vs absent)	1.33	0.78–2.25	0.30
Operation time (mins) (per 10 mins increase)	1.01	1.01–1.02	<0.001
Estimated intraoperative blood loss (mL) (per 10 mL increase)	1.002	1.00–1.004	0.083
Tumor invasion (T2-3vs.T1)	1.06	0.78–1.46	0.70
Lymph node metastasis	1.46	0.78–2.71	0.24

Note: FEV₁/FVC, FEV₁ to FVC ratio.