Table 1.

Comparisons within the same breast (paired $t$-tests). Statistical significance (in $p$-values) between total hemoglobin concentration (HbT) values of different tissue types in two-dimensional (2-D) and digital breast tomosynthesis (DBT)-guided optical reconstructions.

HbT	Adipose versus fibroglandular	Adipose versus tumor	Fibroglandular versus tumor
Malignant (30)	0.003 (0.001)	0.004 (0.002)	0.011 (0.020)
Solid (24)	0.546 (0.416)	0.553 (0.877)	0.463 (0.780)
Cyst (13)	0.108 (0.190)	0.089*(0.209)	0.193 (0.412)

Note: in each $p$-value pair, $p$-value for 2-D guided result is followed by that of DBT-guided result (in parentheses).