Table 4.

Comparison of continuous characteristics between patients with pneumothoraxes after CT-PTLB who were successfully aspirated compared to those who required chest drain insertion

Characteristic	PTX treated with aspiration only (n = 81)	PTX required chest drain insertion after aspiration (n = 21)	p-valuea
Lesion size (mm)	29.4	26.0	0.476
Needle distance (mm)	21.0	34.7	0.005
Longest PTX radial depth (mm)	20.8	40.6	<0.001

PTLB, percutaneous transthoracic lung biopsy ; PTX, pneumothorax.

^a p-value derived from independent t-test for continuous variables