Table 4.

Total hemoglobin differences ($\mathrm{\Delta }\mathrm{tHb}$), standard deviations (Std) and $p$-values between the malignant and benign sub-groups with and without subtracting the background.

Subtraction bg.	Computed values	Prolif.	FA	FN	FC	Cyst	Tissue and others	LN	Benign
With	$\mathrm{\Delta }\mathrm{tHb}$	30.9	37.6	29.8	43.9	47.1	44.6	46.0	38.9
	Std	5.5	4.2	5.9	4.5	4.4	8.1	13.6	3.7
	$p$-Value	$<0.0001$	$<0.0001$	$<0.0001$	$<0.0001$	$<0.0001$	0.0004	0.0159	$<0.0001$
Without	$\mathrm{\Delta }\mathrm{tHb}$	28.5	29.4	26.4	40.3	40.0	46.0	43.9	33.6
	Std	5.5	4.1	6.0	4.4	4.6	9.1	16.3	3.6
	$p$-value	$<0.0001$	$<0.0001$	0.0001	$<0.0001$	$<0.0001$	0.0011	0.0396	$<0.0001$