Table 2.

Stage Distribution of LDCT Screen-Detected Cancers According to Nodule Size on Screen

Average Nodule Sizea	NSCLC			SCLC
	No.	% Stage I	% Stage III/IV	No.	% Stage I	% Stage III/IV
3 to < 7 mm	40	73	15	7	14	86
7 to < 10 mm	83	81	14	1	0	100
10 to < 15 mm	122	79	16	4	0	75
15 to < 20 mm	79	75	14	5	0	80
20 to < 30 mm	55	69	24	3	0	67
≥ 30 mm	32	34	59	3	0	100
Allb	587	67	25	46	4	85

Three unknown-stage small cell lung cancer (SCLC) cases were excluded, including one case with one noncalcified nodule (NCN) in the cancer lobe (size, 10-14 mm). Nine unknown-stage non-small cell lung cancer (NSCLC) cases were excluded, including seven cases with one NCN in the cancer lobe (two 7-9 mm, two 10-14 mm, two 15-19 mm, and one 20-29 mm). Also excluded were three NSCLC cases with one NCN in the cancer lobe but unknown size of the NCN. See Table 1 legend for expansion of other abbreviation.

^aAverage of longest diameter and longest perpendicular. Analysis limited to subjects with one (and only one) NCN in the lobe of the cancer at screen detection.

^bIncludes subjects with 0 or ≥ 2 NCNs in the cancer lobe, and with unknown lobe of the cancer.