Table 2.

General characteristics and their relationship with lymph node metastasis (Student’s t-test)

Variables	pN0	pN1 + N2	t	p
Tumor size (mm)	17.13 ± 6.41	22.41 ± 5.34	− 6.24	< 0.001
Consolidation size (mm)	10.94 ± 8.33	20.82 ± 5.64	− 10.80	< 0.001

pN0: Pathological diagnosis without lymph node metastasis. pN1 + N2: Pathological diagnosis with N1 and/or N2 metastasis