Table 2

 Concentration (range) in μg/m3 and distribution of selected VOCs indoors for cases and controls

Volatile organic compoundCasesControls
25th75th90thMedian25th75th90thMedianp value
Data are shown as 25th, 75th, and 90th percentiles and median (range) for cases and controls.
Benzene17.434.746.824.8 (0.01–81.9)2.0124.131.711.8 (0.01–58.9)0.000
Toluene6.320.636.911.9 (0.8–153.9)3.612.122.56.2 (0.01–64.8)0.000
m-Xylene0.63.315.51.4 (0.01–319.8)0.011.55.20.7 (0.01–31.5)0.016
o,p-Xylene2.812.325.15.9 (0.01–93.1)2.16.213.63.2 (0.01–57.4)0.005
Ethylbenzene0.011.43.61.4 (0.01–14.7)0.011.53.60.8 (0.01–16.5)0.425
Styrene0.010.11.30.01 (0.01–6.4)0.010.010.80.01 (0.01–0.8)0.230
Chlorobenzene0.010.446.80.01 (0.01–45.6)0.010.011.40.01 (0.01–21.5)0.003
1,2-dichlorobenzene3.219.153.59.4 (0.01–201.8)1.711.90.84.3 (0.01–34.7)0.000
1,3-dichlorobenzene0.0112.331.13.6 (0.01–174.3)0.015.022.31.1 (0.01–53.0)0.003
1,4-dichlorobenzene0.011.26.70.01 (0.01–123.9)0.010.015.00.01 (0.01–34.7)0.540
Total VOCs45.0125.5204.678.5 (10.8–622.7)19.969.8101.036.2 (2.5–198.2)0.000