Table 3.

Use of radiologic imaging after stereotactic ablative radiotherapy (SABR) and thoracoscopic resection during follow-up. Figures are median (interquartile range) numbers of scans

	Full cohort				Matched cohort
	SABR	Surgery	P value		SABR	Surgery	P value
SABR v thoracoscopic SLR tumor size ≤2 cm
PET/PET-CT in first year	1 (0-3)	0 (0-0)	<0.001		2 (0-3)	0 (0-0)	<0.001
PET/PET-CT in first 2 years	2 (0-4)	0 (0-0)	<0.001		2 (0-4)	0 (0-2)	<0.001
CT in first year	4 (2-6)	2 (1-4)	<0.001		4 (2-6)	2 (0-4)	<0.001
CT in first 2 years	5 (2-9)	4 (2-8)	0.004		6 (2-10)	4 (2-6)	<0.001
SABR v thoracoscopic resection tumor size ≤5 cm
PET/PET-CT in first year	1 (0-3)	0 (0-0)	<0.001		2 (0-3)	0 (0-0)	<0.001
PET/PET-CT in first 2 years	2 (0-4)	0 (0-1)	<0.001		2 (0-4)	0 (0-1)	<0.001
CT in first year	3 (2-6)	2 (1-4)	<0.001		3 (2-6)	2 (1-4)	<0.001
CT in first 2 years	5 (2-9)	4 (2-7)	0.02		5 (2-9)	4 (2-6)	<0.001

PET=positron emission tomography; CT=computed tomography; SLR=thoracic sublobar lung resection.