Table 1.

Patient characteristics

Patient characteristics	Number of patients
Histology
Adeno-Ca	83
Squamous Cell Ca	80
Other	17
cT-category
T1	18
T2	35
T3	53
T4	74
Pattern of lymph node spread by EBUS/PET: Discovery group 1 of patients with EBUS-TBNA samples from all echelons: n = 104
1.1: echelon-1, 2, 3: negative, negative, negative (EBUS/PET)	4/4
1.2: echelon-1, 2, 3: positive, negative, negative (EBUS/PET)	31/21
1.3: echelon-1, 2, 3: positive, positive, negative (EBUS/PET)	52/37
1.4: echelon-1, 2, 3: negative, positive, negative (EBUS/PET)	3/2
1.5.1: echelon-1, 2, 3: negative, negative, positive (EBUS/PET)	0/1
1.5.2: echelon-1, 2, 3: positive, negative, positive (EBUS/PET)	1/4
1.5.3: echelon-1, 2, 3: negative, positive, positive (EBUS/PET)	0/1
1.6: echelon-1, 2, 3: positive, positive, positive (EBUS/PET)	13/34
Pattern of lymph node spread by EBUS/PET: Validation group 2 of patients with EBUS-TBNA samples for which EBUS samples are missing at echelon-1: n = 37
2.1: echelon-2, 3: negative, negative (EBUS/PET)	15/10
2.2: echelon-2, 3: positive, negative (EBUS/PET)	17/15
2.3: echelon-2, 3: negative, positive (EBUS/PET)	1/2
2.4: echelon-2, 3: positive, positive (EBUS/PET)	4/10
Pattern of lymph node spread by PET/ EBUS: Validation group 3 of the remaining patients with EBUS-TBNA samples for which EBUS samples are missing at echelon-3: n = 39
3.1: echelon-1, 2: negative/missing, negative (EBUS/PET)	3/2
3.2: echelon-1, 2: positive, negative (EBUS/PET)	12/9
3.3: echelon-1, 2: positive, positive (EBUS/PET)	14/19
3.4: echelon-1, 2: negative/missing, positive (EBUS/PET)	4/3
3.5: echelon-2: Patients with EBUS-untested echelon-2	6
RT-intent
Definitive RT/CTx	114
Neoadjuvant RT/CTx	66
Laterality of the primary tumor
Left-sided	83
Right-sided	93
Bilateral primaries	4
Tumor localization
Upper or middle lobe alone	63
Lower lobe alone	27
Centrally or more than one lobe	90

Age	Median and range (years)
Median	62.9
Range	43.6–84.0

All numbers represent patients’ counts, except in the rows with patients’ age