Table 3.

Notch presence in the study groups

Outcomes	Notch in two ears		Notch in right ear		Notch in left ear
	OR (95% CI)	p value	OR (95% CI)	p value	OR (95% CI)	p value
Model 11
No exposure	1		1		1
Noise exposure only	4.88 (2.55–9.33)	< 0.0001	3.69 (2.12–6.42)	< 0.0001	5.42 (2.96–9.93)	< 0.0001
Solvent exposure only	1.43 (0.44–4.59)	0.544	1.41(0.53–3.71)	0.483	1.57 (0.54–4.54)	0.403
Noise and solvent exposure	12.03 (5.39–18.81)	< 0.0001	9.75 (4.71–16.21(	< 0.0001	14.46 (6.69–25.26)	< 0.0001
Model 22
No exposure	1		1		1
Noise exposure only	4.49 (2.23–9.01)	< 0.0001	3.41 (1.87–6.24)	< 0.0001	4.61 (2.39–8.89)	< 0.0001
Solvent exposure only	1.86 (0.55–6.22)	0.312	1.81 (0.66–4.99)	0.247	1.94 (0.64–3.91)	0.239
Noise and solvent exposure	11.72 (4.81–20.58)	< 0.0001	9.91 (4.37–17.44)	< 0.0001	12.83 (5.46–20.14)	< 0.0001

Model 1: without adjustment

Model 2: age, working years, education level adjusted