. Author manuscript; available in PMC: 2009 Dec 9.

Published in final edited form as: Opt Express. 2008 Sep 15;16(19):14961–14978. doi: 10.1364/oe.16.014961

Table 2.

PCs identified from Wilcoxon rank-sum test as displaying statistically significant difference between malignant and other non-malignant breast tissues (at significance level of p < 0.05). The variance that each PC accounts for was also listed in the table.

Excitation Wavelength (nm)	PC # (variance)	Malignant vs. Fibrous/Benign	Malignant vs. Adipose	Malignant vs. Non-malignant
340	PC1 (83.1%)		p < 1e-12	p < 1e-9
	PC2 (8.1%)		p < 0.01	p < 0.001
360	PC1 (78.4%)		p < 1e-11	p < 1e-8
	PC2 (15.6%)		p < 1e-4	p < 1e-4
380	PC1 (51.9%)		p < 1e-10	p < 1e-8
	PC2 (43.2%)		p < 0.001	p < 0.01
400	PC1 (75.2%)		p < 1e-5	p < 1e-4
	PC2 (22.8%)		p < 1e-4	p < 0.001
reflectance	PC1 (91.9%)		p < 1e-6	p < 1e-6
	PC2 (3.1%)	p < 0.01	p < 1e-4	p < 1e-4