Table 1. Patient demographic risk factors for prolonged chest tube requirement post percutaneous lung biopsy.

P-values represent result of Mann-Whitney test for age, Fisher exact test for all other factors.

	Chest tube dwell time < 3 days post biopsy	Chest tube dwell time ≥ 3 days post-biopsy	p value
Total (n)	132	55
Age (years)
Mean ± SD	70 ±11	67±12	p= 0.25
Range	31–92	25–92
Sex
% Male (n)	53% (70)	51% (28)	P= 0.87
Prior ipsilateral lung intervention %
%Total (n)	27% (36)	20% (11)	p =0.28
% Biopsy only (n)	12% (16)	7% (4)	p=0.44
% Ablation (n)	0.7% (1)	2% (1)	p=0.50
% Surgery (n)	12% (16)	18% (5)	p=0.62
% Radiation (n)	1.5% (2)	2% (1)	p = 1.00
History of smoking	66% (37)	56% (30)	p= 0.18
% Yes (n)
Underlying emphysema/COPD
%Yes(n)	27% (34)	33% (18)	p=0.48