Table 4.
Bivariate and multivariate linear regression analysis for PTA (500 Hz-8000 Hz) outcome
| Bivariate model | Multivariate model | Final multivariate model | ||||||
|---|---|---|---|---|---|---|---|---|
|
Characteristic |
|
Beta |
p |
Beta |
p |
Characteristic |
Beta |
p |
| Age |
|
0.411 |
p<0.0001 |
0.089 |
0.894 |
Age |
0.365 |
p<0.0001 |
| Male |
|
0.056 |
0.594 |
−0.248 |
0.093 |
|
|
|
|
Solvent exp. |
EXP |
0.332 |
0.001 |
−0.122 |
0.855 |
EXP |
0.296 |
0.002 |
| |
NEXP |
Reference |
|
|
|
|
|
|
| Tenure |
|
0.415 |
p<0.0001 |
−0.068 |
0.834 |
|
|
|
|
Risk factors |
Cigarettes |
0.197 |
0.158 |
0.246 |
0.083 |
|
|
|
| |
Alcohol |
0.200 |
0.152 |
0.278 |
0.043 |
|
|
|
| |
ShootWP |
−0.060 |
0.635 |
0.040 |
0.754 |
|
|
|
| |
ShootNP |
−0.035 |
0.786 |
0.162 |
0.246 |
|
|
|
| |
No Shoot |
Reference |
|
|
|
|
|
|
| |
Pastnoise |
0.174 |
0.095 |
0.117 |
0.377 |
|
|
|
|
Interactions |
|
|
|
|
|
Interactions |
|
|
| Age*solvent | 0.627 | 0.581 | ||||||
Note. Solvent exp: EXP: solvent-exposed group, NEXP: non-exposed group (reference); Tenure: number of years working at the factory exposed to solvents; Cigarettes: Number of cigarettes smoked per week; Alcohol: Number of drinks per month; Shoot WP: history of shooting practice wearing hearing protection; ShootNP: history of shooting practice without wearing hearing protection; No shoot: absence of shooting practice (reference); Pastnoise: history of previous occupational noise exposure; Interaction Age*solvent: factor of age times solvent group (exposed versus non-exposed).