Table 3.

Correlations of interleukin-6 (IL-6) with clinicopathological features of breast cancer patients.

Baseline	Cohort 1			Cohort 2
	IL-6low	IL-6high	P	IL-6low	IL-6high	P
Age			0.870			0.284
≤52 years	33	24		37	40
>52 years	31	24		36	27
Histology grade		0.208			0.523
0–I	7	2		11	8
II–III	55	43		59	59
Lymph node			<0.001			0.012
Negative	58	23		51	33
Positive	6	22		20	32
Tumor size			0.060			0.936
≤3 cm	50	29		42	39
>3 cm	13	17		31	28
Stage			<0.001			0.001
0–II	59	24		56	35
III–IV	5	24		15	32
ER			0.986			0.059
Negative	21	16		21	30
Positive	43	33		47	34
PR			0.256			0.232
Negative	22	22		28	33
Positive	42	27		40	31
HER2			0.242			0.681
Negative	38	24		50	45
Positive	14	15		18	19