Table 3.

Surgical and pathologic outcomes stratified by risk classification

Outcome measure		Predicted risk groupNo. (%)		P
		Low-risk (n= 48)	High-risk (n= 30)
Resectability Rate		44 (92)	16 (53)	<0.001
R0		35 (73)	10 (33)	0.001
R1		9 (19)	6 (20)	0.892
Locally-advanced		0 (0)	5 (17)	0.007
Metastatic		4 (8)	9 (30)	0.026
AJCC Stage	1A	3 (6)	0 (0)	0.002
	1B	3 (6)	2 (6)
	2A	13 (27)	4 (13)
	2B	25 (52)	10 (33)
	3	0 (0)	5 (17)
	4	4 (8)	9 (30)
Median number of total nodes per specimen if resected (range)		10 (3–34)	12 (4–41)	0.30
Median number of positive nodes if Stage 2B (range)		2 (1–10)	3 (1–10)	0.81
Mean node ratio if Stage 2B (±SD)		0.33 (±0.23)	0.27 (±0.24)	0.50
Adjuvant chemotherapya		32 (78)	16 (73)	0.76
Adjuvant radiationb		9 (23)	7 (33)	0.54
Tumour location, head		38 (79)	22 (73)	0.55

^aData for adjuvant chemotherapy were known for 41 low-risk and 22 high-risk lesions.

^bData for adjuvant radiation were known for 39 low-risk and 21 high-risk lesions.