Table 2. Exhaled VOC concentrations in studied groups.

	Healthy subjects (n = 37)		Patients with lung cancer (n = 116)		p
Ethanol	13.5	(0.00–68.7)	14.5	(0.00–160)	0.45
Acetone	17.5	(0.00–68.7)	19.6	(0.00–1418)	0.43
Isoprene	31.5	(3.76–184)	43.4	(2.88–202)	0.02
Hexane	0.25	(0.00–4.82)	0.25	(0.00–6.28)	0.47
Benzene	0.10	(0.00–0.48)	0.20	(0.00–0.81)	0.42
Cyclohexane	0.10	(0.00–0.48)	0.20	(0.00–1.71)	0.002**
Heptane	0.15	(0.00–6.26)	0.17	(0.00–7.36)	0.69
Toluene	0.19	(0.00–1.13)	0.26	(0.00–1.82)	0.02
Octane	0.12	(0.00–3.66)	0.16	(0.00–3.38)	0.32
Ethyl benzene	0.10	(0.00–1.33)	0.15	(0.00–3.41)	0.02
Xylene	0.07	(0.00–1.40)	0.16	(0.00–5.60)	0.0001**
Nonane	0.07	(0.00–1.35)	0.10	(0.00–18.0)	0.01
Decane	2.88	(0.26–18.5)	4.25	(0.06–62.9)	0.31
Phenyl acetate	0.78	(0.01–4.27)	0.53	(0.00–7.53)	0.46

Values are median ppb (range);

**p < 0.003