Research Article
Formaldehyde Exposure and Its Potential Health Risk in Some Beauty Salons in Kumasi Metropolis
Table 6
Multiple linear regression estimates including the intercept and the significance levels.
| Model | Unstandardized coefficients | Standardized coefficients | T | Sig. | B | Std. error | Beta |
| 1 | Constant | −268.119 | 146.782 | — | −1.827 | 0.073 | Temperature (°C) | 7.267 | 4.708 | 0.162 | 1.543 | 0.129 | Academic qualification | −12.732 | 10.348 | −0.138 | −1.230 | 0.224 | Years of working experience | −1.597 | 13.870 | −0.014 | −0.115 | 0.909 | Age of facility (beauty salon) | 59.091 | 20.969 | 0.303 | 2.818 | 0.007 | Number of services | 20.397 | 9.465 | 0.137 | 2.155 | 0.036 | Average number of customers in a week | 47.445 | 12.556 | 0.444 | 3.779 | 0.000 | 2 | Constant | −266.598 | 144.844 | — | −1.841 | 0.071 | Temperature (°C) | 7.180 | 4.606 | 0.160 | 1.559 | 0.125 | Academic qualification | −12.741 | 10.253 | −0.138 | −1.243 | 0.219 | Age of facility (beauty salon) | 58.372 | 19.833 | 0.299 | 2.943 | 0.005 | Number of services | 20.537 | 9.301 | 0.238 | 2.308 | 0.032 | Average number of customers in a week | 46.901 | 11.526 | 0.439 | 4.069 | 0.000 | 3 | Constant | −256.037 | 145.308 | — | −1.762 | 0.084 | Temperature (°C) | 6.851 | 4.621 | 0.152 | 1.483 | 0.144 | Age of facility (beauty salon), | 61.753 | 19.743 | 0.316 | 3.128 | 0.003 | Number of services | 16.624 | 8.794 | 0.193 | 1.890 | 0.064 | Average number of customers in a week | 43.451 | 11.242 | 0.406 | 3.865 | 0.000 | 4 | Constant | −45.825 | 32.140 | — | −1.426 | 0.159 | Age of facility (beauty salon) | 62.855 | 19.939 | 0.322 | 3.152 | 0.003 | Number of services | 18.443 | 8.801 | 0.214 | 2.096 | 0.041 | Average number of customers in a week | 46.625 | 11.154 | 0.436 | 4.180 | 0.000 |
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aDependent variable: formaldehyde concentration (CL (μg/m3)).
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