Table 5.

ORs (95% CIs) of hearing loss and noise notch by noise exposure levels at longest job

Variables		Model A*	Model B†	Model C‡
A. ORs of hearing loss	Hearing loss no./participants no.
O*NET noise (unit score)§		1.74 (1.35 to 2.26)	1.68 (1.30 to 2.18)	1.65 (1.28 to 2.13)
O*NET noise quintile
Quintile 1 (1.795–2.588)	65/695	1 (Reference)	1 (Reference)	1 (Reference)
Quintile 2 (2.653–2.729)	76/830	1.04 (0.62 to 1.72)	1.01 (0.60 to 1.69)	0.99 (0.59 to 1.65)
Quintile 3 (2.737–2.868)	67/731	1.14 (0.64 to 2.03)	1.10 (0.62 to 1.96)	1.09 (0.61 to 1.95)
Quintile 4 (3.121–3.631)	112/805	1.61 (0.96 to 2.70)	1.50 (0.89 to 2.52)	1.43 (0.87 to 2.36)
Quintile 5 (3.667–4.368)	136/767	2.30 (1.32 to 4.01)	2.14 (1.22 to 3.75)	2.07 (1.18 to 3.63)
p Trend		0.001	0.0019	0.0026
B. ORs of noise notch	Noise notch no./participants no.
O*NET noise (unit score)§		1.45 (1.20 to 1.76)	1.43 (1.18 to 1.73)	1.41 (1.17 to 1.70)
O*NET noise quintile
Quintile 1 (1.795–2.588)	101/695	1 (Reference)	1 (Reference)	1 (Reference)
Quintile 2 (2.653–2.729)	119/830	0.98 (0.67 to 1.42)	0.97 (0.67 to 1.42)	0.96 (0.66 to 1.40)
Quintile 3 (2.737–2.868)	77/731	0.80 (0.58 to 1.11)	0.80 (0.58 to 1.10)	0.79 (0.57 to 1.09)
Quintile 4 (3.121–3.631)	168/805	1.40 (1.05 to 1.87)	1.37 (1.02 to 1.84)	1.35 (1.00 to 1.81)
Quintile 5 (3.667–4.368)	190/767	1.60 (1.16 to 2.20)	1.55 (1.12 to 2.14)	1.51 (1.09 to 2.09)
p Trend		0.0016	0.0032	0.0045

^*Model A was adjusted for age, age², sex and race/ethnicity.

^†Model B: model A+further adjusted for body mass index, ototoxic medication, cumulative cigarette pack-years, current diagnosis of hypertension and current diagnosis of diabetes.

^‡Model C: model B+further adjusted for recreation noise and firearm noise.

^§Per cent change in hearing thresholds for one-unit score increase.

O*NET, Occupational Information Network.