Table 3.

Bivariate and multivariate predictors of hearing loss

	Total				HPD non-users				HPD users
	Bivariate		Multivariate (R 2 = 0.42)		Bivariate		Multivariate (R 2 = 0.41)		Bivariate		Multivariate (R 2 = 0.43)
	B	99% CI	B	99% CI	B	99% CI	B	99% CI	B	99% CI	B	99% CI
Age	0.80	0.79–0.81	0.61	0.58–0.64	0.76	0.72–0.79	0.64	0.61–0.67	0.82	0.80–0.84	0.59	0.55–0.63
Noise intensity	0.31	0.26–0.36	0.18	0.13–0.23	0.24	0.18–0.29	0.19	0.13–0.24	0.30	0.25–0.35	0.20	0.15–0.25
Years of exposure	0.16	0.13–0.19	0.09	0.06–0.12	0.12	0.07–0.17	0.05	−0.01 to 0.12	0.20	0.16–0.23	0.12	0.09–0.16
Use of HPD	2.92	2.43–3.41	1.44	0.95–1.95	–				–
No job change	0.30	−0.14 to 0.74	0.72	0.30–1.14	−0.89	−1.70 to −0.03	0.37	−0.45 to 1.18	0.18	−0.33 to 0.69	0.79	0.31–1.27
Hearing complaints	12.8	12.33–13.27	12.38	11.98–12.91	13.16	12.19–14.13	12.76	11.79–13.73	12.54	11.96–13.12	12.20	11.61–12.79
Bothered by noise	2.97	2.52–3.42	0.60	0.16–1.04	3.91	2.89–4.94	1.26	0.283–2.23	2.55	2.05–3.06	0.51	0.03–0.99
Smoking status
Never	Reference				Reference				Reference
Current	0.04	−0.49 to 0.57			−0.44	−1.42 to 0.55			0.18	−0.43 to 0.78
Ex	0.05	−0.48 to 0.58			−0.37	−1.36 to 0.63			0.17	−0.44 to 0.78
Cigarettes/day	−0.005	−0.04 to 0.03			0.000	−0.05 to 0.05			−0.01	−0.04 to 0.02
Years smoked	0.000	−0.03 to 0.03			0.03	−0.02 to 0.07			−0.01	−0.04 to 0.01
Alcohol intake	−0.001	−0.02 to 0.01			−0.01	−0.05 to 0.03			0.002	−0.25 to 0.26
Hypertension	0.11	−0.43 to 0.65			0.13	−0.85 to 1.12			0.21	−0.40 to 0.81

Bivariate predictors are age-adjusted. Dependent variable is binaural PTA_3,4,6

Variables are included in the multivariate regression analysis if bivariate regression shows a significant predictor at the 0.10 level