Table 3. VOCs discriminating breast non-transformed from cancer-derived cell lines.

Trend	Class	Compound	CAS number	p value
Increase	Hydrocarbons	2,4-Dimethyl-1-heptene	19549-87-2	3.0 × 10−4
		2-Xylene	95-47-6	1.0 × 10−4
		2,3-Dimethylhexane	584-94-1	1.0 × 10−4
		2,2-Dimethylbutane	75-83-2	1.0 × 10−4
	Secondary alcohol	Cyclohexanol	108–93-0	2.0 × 10−5
	Ketons	2-Dodecanone	6175-49-1	0.003
Decrease	Ketons	2-Nonanone	821-55-6	0.03
		4-Methyl-2-heptanone	6137-06-0	0.04
Manova*				7.7 × 10−3

GC-MS analysis in the non-transformed MCF-10A and in cancer derived cell lines. The p-values obtained by t-test analysis for each compound and by MANOVA analysis for all compounds reported in Table 2 are shown. A p-value < 0.05 has been considered statistically significant.

^*considering all the VOCs of the Table 2.