Table 1. The tumor size and lymph node metastasis in patients classified according to the SED.

		Low SED	Middle SED	High SED	p value
All patients
Tumor size (cm)		1.95 (±0.78)	2.33 (±1.04)	3.06 (±1.65)	<0.001
LN metastasis
No		487 (64.9%)	428 (57.1%)	402 (53.6%)	<0.001
Yes		263 (35.1%)	321 (42.9%)	348 (46.4%)
HR+/HER2-
Tumor size (cm±SD)		1.78 (±0.71)	2.16 (±0.85)	2.80 (±1.53)	<0.001
LN metastasis
No		261 (62.4%)	243 (57.3%)	248 (54.5%)	<0.057
Yes		157 (37.6%)	181 (42.7%)	207 (45.5%)
HR+/HER2+
Tumor size (cm±SD)		2.17 (±0.87)	2.26 (±1.27)	3.23 (±1.68)	<0.001
LN metastasis
No		24 (54.5%)	32 (54.2%)	26 (47.3%)	0.696
Yes		20 (45.5%)	27 (45.8%)	29 (52.7%)
HR-/HER2+
Tumor size (cm±SD)		2.43 (±0.92)	2.75 (±1.26)	3.73 (±1.87)	<0.001
LN metastasis
No		43 (58.9%)	39 (55.7%)	35 (47.9%)	0.393
Yes		30 (41.1%)	31 (44.3%)	38 (52.1%)
HR-/HER2-
Tumor size (cm±SD)		2.07 (±0.75)	2.53 (±1.15)	3.39 (±1.67)	<0.001
LN metastasis
No		158 (73.8%)	111 (57.5%)	92 (56.4%)	<0.001
Yes		56 (26.2%)	82 (42.5%)	71 (43.6%)