Table 1.

Patient characteristics, estimated or replicated from the source.¹²

		Training ($n=262$)	Testing ($n=89$)
Source	Country	USA	Netherlands
Gender	Male	100 (38%)	59 (66%)
	Female	124 (47%)	28 (32%)
	N/A	38 (15%)	2 (2%)
Histology	ADC	129 (49%)	42 (48%)
	Squamous	61 (23%)	33 (38%)
	Other	34 (13%)	12 (14%)
	N/A	38 (15%)	0 (0%)
Stage	I	123 (47%)	39 (44%)
	II	35 (13%)	26 (29%)
	III	46 (18%)	12 (14%)
	Other	20 (8%)	10 (11%)
	N/A	38 (14%)	2 (2%)
Smoking status	Current	66 (25%)	N/A
	Former	141 (54%)	N/A
	None	17 (7%)	N/A
	N/A	38 (14%)	N/A
Tumor site	Primary	224 (86%)	87 (98%)
	N/A	38 (14%)	2 (2%)
Status	Alive	134 (51%)	41 (46%)
	Deceased	90 (35%)	46 (52%)
	N/A	38 (14%)	2 (2%)
Follow-up	Median months	32	31