Table 2.

Summary of volatile organic compounds (VOC) concentrations (ppm) in the formal and informal nail salons.

VOC	Formal nail salons (n = 6)					Informal nail salons (n = 10)					p-value*
	n	%	GM	GSD	IQR	n	%	GM	GSD	IQR
Ethanol	29	100.0	2.06	1.58	1.68–2.66	29	96.6	1.24	4.4	0.633–2.92	<0.05
Acetone	29	100.0	43.80	2.49	26.3–66.1	29	100.0	9.87	5.13	4.59–32	<0.05
Ethyl acetate	29	100.0	0.559	1.72	0.406–0.868	29	82.8	0.058	5.44	0.023–0.16	<0.05
Benzene	29	17.2	0.004	1.33	0.004–0.005	29	37.9	0.003	2.33	0.002–0.005
Methyl methacrylate	29	3.4	0.002	–	–	29	89.7	1.970	9.48	0.588–13.3
Ethyl methacrylate	29	89.7	0.334	6.93	0.083–1.21	29	82.8	0.765	14.8	0.0748–7.03	>0.05
Propyl acetate	29	62.1	0.007	3.12	0.003–0.016	29	10.3	0.004	2.23	0.002–0.006
Toluene	29	96.6	0.010	1.81	0.007–0.015	29	86.2	0.008	1.56	0.006–0.010	>0.05
n-Butyl acetate	29	100.0	0.131	1.97	0.085–0.202	29	3.4	0.002	–	–
Xylene	29	48.3	0.005	2.64	0.003–0.009	29	79.3	0.006	1.69	0.005–0.008
d-Limonene	29	96.6	0.025	2.75	0.015–0.038	29	44.8	0.004	6.99	0.001–0.003
2-Propanol	29	96.6	17.80	1.72	13.7–23.6	29	24.1	0.139	6.16	0.041–0.416
White Spirits	29	82.8	0.076	4.81	0.017–0.204	29	93.1	0.155	2.45	0.084–0.288	<0.05

n, sample number; %, detection frequency; GM, geometric mean; GSD, geometric standard deviation; IQR, interquartile range. *Student t-test.