Zero-leak prediction during major lung resection aiming for minimal chest drainage duration: a retrospective analysis

Table 3 Multivariate analysis of preoperative and intraoperative factors

Characteristic	OR^a	[95% CI^a]	p value
Age	1.01	[0.99, 1.03]	0.18
Sex: *Male*	2.16	[1.30, 3.63]	0.003
BMI	0.85	[0.79, 0.91]	< 0.001
Pack-year	0.99	[0.98, 1.00]	0.17
Emphysema: *present*	2.00	[1.12, 3.61]	0.020
Tumor size	0.97	[0.81, 1.16]	0.70
Lobe: *Upper*	1.72	[1.13, 2.63]	0.012
Procedure: *Lobectomy*	2.88	[1.84, 4.56]	< 0.001
Adhesion area	2.85	[1.40, 6.70]	0.008
Incomplete fissure	1.92	[1.25, 3.02]	0.004

^aOR odds ratio, CI confidence interval. Significant factors with p-values less than 0.05 are represented in bold. The factors, adhesion area and incomplete fissure, were implemented as numerical variables ranging 1–3 and 1–4, respectively. See Table 1 for details

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