Table 3 Indoor air pollutions measurements in the case and control groups

TVOCs^c

 Median(IQR) (mg/m³)

0.005(0.01)

0.40(0.98)

 Range (mg/m³)

0.005–1.85

0.005–7.02

 Number at or above the MDL[n(%)]

20[28.6%]

41[77.4%]

 Number over reference limit [n(%)]

4[5.2%]

20[37.7%]

<0.001^a

Benzene^c

 Median (IQR) (mg/m³)

0.005(0)

0.005(0.06)

 Range (mg/m³)

0.005-1.0

0.005-1.0

 Number at or above the MDL[n(%)]

9[11.7%]

22[41.5%]

 Number over reference limit[n(%)]

9[11.7%]

22[41.5%]

<0.001^a

Toluene^c

 Median (IQR) (mg/m³)

0.005(0)

0.005(0.20)

 Range (mg/m³)

0.005-0.6

0.005-1.0

 Number at or above the MDL[n(%)]

11[14.3%]

24[45.3%]

 Number over reference limit [n(%)]

3[3.9%]

2[3.8%]

1^a

Xylene^c

 Median (IQR) (mg/m³)

0.005(0)

0.005(0.16)

 Range (mg/m³)

0.005-0.6

0.005-1.4

 Number at or above the MDL[n(%)]

10[13.0%]

22[41.5%]

 Number over reference limit [n(%)]

5[6.5%]

2[3.8%]

0.7^a

Formaldehyde^c

 Median (IQR) (mg/m³)

0.02(0.033)

0.01(0.015)

 Range (mg/m³)

0.005–0.79

0.005–0.609

 Number at or above the MDL[n(%)]

72[93.5%]

52[98.1%]

 Number over reference limit [n(%)]

11[14.3%]

7[13.2%]

0.86 ^a

Temperature

 Median (IQR) (℃)

28.7(5)

25(6)

<0.001^b

Humidness

 Median (IQR) (%)

47(15)

38(10.5)

0.002^b