Table 2.

Correlation of binary clinicopathological variables with hemoglobin parameters

		rtHb			Tumor stO2
Variables	No.	Mean	SD	P-value	Mean	SD	P-value
Histological grade
High	23	1.9	1.0	0.005	69.8	4.6	n.s.
Low	58	1.4	0.5		68.4	5.4
Lymphatic vascular invasion
Positive	22	1.9	1.1	0.020	70.8	4.7	n.s.
Negative	68	1.5	0.6		68.4	5.2
Nodal involvement
Positive	30	1.8	0.9	n.s.	68.8	5.2	n.s.
Negative	88	1.6	1.1		68.9	5.4
ER status
Positive	90	1.6	1.1	n.s	69.3	4.6	n.s.
Negative	20	1.9	1.0		68.4	6.9
PgR status
Positive	67	1.7	1.2	n.s.	69.4	5.0	n.s.
Negative	43	1.7	0.8		69.5	3.9
HER2 status
Positive	10	1.5	0.5	n.s.	69.4	5.6	n.s.
Negative	94	1.7	1.1		69.5	4.6
Ki67 index
High	65	1.7	1.3	n.s.	69.8	4.8	n.s.
Low	44	1.6	0.7		69.3	4.3

ER, estrogen receptor; HER2, human epidermal growth factor receptor 2; n.s., not significant; PgR, progesterone receptor; rtHb, relative total hemoglobin; stO₂, tissue oxygen saturation.