Table 2. Target lesion features as risk factors for prolonged chest tube requirement post percutaneous lung biopsy.

P- values represent result of Mann-Whitney test for diameter and distances, Fisher exact test for laterality, and chi-square for lobe and pathologic categories.

	Chest tube dwell time <3 days post- biopsy	Chest tube dwell time ≥3 days post-biopsy	p-value
Total (n)	132	55
Lesion Diameter (mm)
Median	17.0	17.5	p = 0.59
Range	8.0–63.0	5.0–61.0
Lesion distance from pleura along needle path (mm)
Median	32.0	29.0	p = 0.64
Range	0.0–113.0	0.0–83.0
Lesion distance from pleura along needle path (mm)
Median	78.5	73.0	p = 0.72
Range	0.0–155.0	0.0–146.0
Right vs. left lung
% R (n)	60% (80)	46% (25)	p = 0.10
Lobe
% Left Upper (n)	33.8% (26)	43.5% (10)	p = 0.20
% Left Lower (n)	5.2% (4)	17.4% (4)
% Right Upper (n)	42.9% (33)	26.1% (6)
% Right Middle (n)	6.4% (5)	8.7% (2)
% Right Lower (n)	11.7% (9)	4.3% (1)
Tissue diagnosis
% Non-diagnostic	3.0% (4)	3.6% (2)	p = 0.77
% Benign	21.1% (28)	25.5% (14)
% Malignant	75.9% (100)	70.9% (39)
Primary vs. metastatic
% Pathologic diagnosis suggestive of metastasis (n)	21% (19)	24% (8)	p = 0.80
Lung Primary Subtypes			p = 0.30
% Adenocarcinoma (n)	84.5% (59)	79.2% (19)
% Squamous (n)	14.1% (10)	12.5% (3)
% Small Cell (n)	0% (0)	4.2% (1)
% Mesothelioma (n)	1.4% (1)	4.2% (1)