Table 6.

Diagnostic yield according to the CT bronchus sign, Chest X-ray findings and lesion size

CT bronchus sign	Visibility on Chest X-ray	Lesion size	Diagnostic yield % (total/malignancy)
A	Clearly visible	All size	88.0/98.6
		≥20 mm	91.9/100
		<20 mm	76.9/94.6
	Vague or invisible	All size	77.8/82.8
		≥20 mm	83.3/83.3
		<20 mm	75.0/82.4
B	Clearly visible	All size	68.8/90.9
		≥20 mm	87.5/83.3
		<20 mm	60.0/100
	Vague or invisible	All size	63.6/59.1
		≥20 mm	50.0/50.0
		<20 mm	65.2/64.3