Does the Low-level occupational exposure to volatile organic compounds alter the seasonal variation of selected markers of oxidative stress? A case–control study in nail technicians

Table 3 Results of partial correlation analysis between airborne levels of organic solvents and biomarkers of oxidative stress in nail technicians

	TBARS [ln-μM]	GPx3 [ln-U/mL]	GPx1 [ln-U/g Hb]	Cp [ln-g/L]	SOD1 [ln-U/mg Hb]
Ethanol [ln-mg/m³]	0.1813	0.0677	0.2628 ^*	−0.1064	0.1004
Acetone [ln-mg/m³]	−0.0661	0.0915	−0.0567	0.2263	−0.2537 ^*
Toluene [ln-mg/m³]	−0.0147	−0.1793	−0.2519 ^*	−0.1047	−0.0036
2-propanol [ln-mg/m³]	−0.0583	−0.0456	0.0085	0.0543	0.1263
2-butanone [ln-mg/m³]	0.0589	0.0219	−0.0473	0.0380	0.1546
Ethyl acetate [ln-mg/m³]	−0.1057	0.1658	−0.0081	0.2208 ^*	0.0110
Isopropyl acetate [ln-mg/m³]	0.0080	0.0431	−0.0513	−0.2522 ^*	0.2146
n-butyl acetate [ln-mg/m³]	0.1906	0.0407	−0.1070	−0.0057	−0.1063

Presented are the semi-partial correlation coefficients (r_sp) for each given pair of airborne level of organic solvent and level of analyzed biomarker. Forward stepwise regression procedure upon ln-transformed data was employed. Significant associations are indicated in bold with respective level of significance indicated by the superscript. The portion of variability explained by the association: ethanol vs. GPx1: 6.9 %; acetone vs. SOD1: 6.4 %; toluene vs. GPx1: 6.3 %; ethyl acetate vs. Cp: 4.9 %; isopropyl acetate vs. Cp: 6.4 %
^* p < 0.05

ISSN: 1745-6673