Table 2.

Odds ratios (95% CIs) of hearing loss by occupational noise exposure.

Occupational noise exposure	N	Model 1 *	Model 2 †	Model 3 ‡
Total
No	7305	ref	ref	ref
1 ≤ year <10	944	0.74(0.64–0.85)	0.94(0.81–1.10)	0.93(0.80–1.09)
10 ≤ year <20	1150	0.94(0.82–1.06)	1.15(0.99–1.33)	1.14(0.99–1.32)
year ≥20	1797	1.38(1.23–1.54)	1.50(1.33–1.69)	1.45(1.28–1.65)
Sex
Male
No	3138	ref	ref	ref
1 ≤ year <10	382	0.78(0.63–0.98)	0.90(0.71–1.14)	0.88(0.69–1.14)
10 ≤ year <20	425	1.04(0.83–1.30)	1.21(0.95–1.54)	1.13(0.88–1.45)
year ≥20	1115	1.59(1.34–1.87)	1.78(1.50–2.11)	1.74(1.45–2.08)
Female
No	4167	ref	ref	ref
1 ≤ year <10	562	0.72(0.60–0.86)	0.97(0.80–1.18)	0.96(0.79–1.16)
10 ≤ year <20	725	0.95(0.81–1.11)	1.15(0.97–1.37)	1.14(0.95–1.35)
year ≥20	682	0.87(0.74–1.02)	1.25(1.05–1.49)	1.21(1.01–1.44)
Age Group, y
<60
No	1048	ref	ref	ref
1 ≤ year <10	221	1.04(0.76–1.43)	1.04(0.76–1.42)	1.00(0.72–1.38)
10 ≤ year <20	254	0.91(0.67–1.24)	0.90(0.66–1.22)	0.90(0.66–1.22)
year ≥20	257	1.18(0.88–1.58)	1.18(0.88–1.58)	1.10(0.82–1.49)
60 ~ <70
No	3491	ref	ref	ref
1 ≤ year <10	480	0.76(0.63–0.92)	0.76(0.62–0.92)	0.75(0.62–0.92)
10 ≤ year <20	527	1.13(0.94–1.37)	1.18(0.98–1.43)	1.18(0.98–1.44)
year ≥20	1007	1.63(1.40–1.89)	1.40(1.20–1.62)	1.37(1.17–1.61)
≥70
No	2766	ref	ref	ref
1 ≤ year <10	243	1.29(0.91–1.83)	1.28(0.90–1.81)	1.26(0.87–1.81)
10 ≤ year <20	369	1.18(0.89–1.56)	1.18(0.90–1.57)	1.11(0.83–1.47)
year ≥20	533	1.79(1.36–2.35)	1.73(1.31–2.27)	1.74(1.30–2.33)

^*Unadjusted.

^†Adjusted for age/sex.

^‡Adjusted for age/sex, race, shift work, smoking status, drinking status, hypertension, ototoxicity medicine, chronic diseases (diabetes mellitus, coronary heart disease, myocardial infarction and stroke).