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Table 2 Parameters affecting the indoor concentrations of air pollutants

From: Indoor concentrations of VOCs in beauty salons; association with cosmetic practices and health risk assessment

 

Parameter

Coefficient

Std. coefficient

Std. Error

P-value

R2

Benzene

Constant

3.786

–

1.163

–

0.387

Dying

0.620

0.622

0.184

0.003

Toluene

Constant

4.768

–

2.146

–

0.204

Dying

0.729

0.452

0.339

0.046

Ethylbenzene

–

–

–

–

–

–

Xylene

Constant

13.027

–

2.356

–

0.222

Hair styling

0.772

0.471

0.341

0.036

Formaldehyde

Constant

−2.232

–

4.265

–

0.415

Nail

1.639

0.549

0.556

0.009

Hair styling

0.892

0.386

0.431

0.054

Acetaldehyde

–

–

–

–

–

–