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Table 4 Adjusted odds ratio of hearing loss by frequencies according to the smoking amount in current smoker

From: Relationship of cigarette smoking and hearing loss in workers exposed to occupational noise

 

1 kHz *

2 kHz *

3 kHz *

4 kHz *

 

N

OR †

95% CI

N

OR †

95% CI

N

OR †

95% CI

N

OR †

95% CI

Smoking amount

(pack-years)

            

0.05-9.9

1,125

1.000

 

1,125

1.000

 

1,125

1.000

 

1,125

1.000

 

10-19.9

1,413

1.562

1.013–2.408

1,413

1.420

1.014–1.988

1,413

1.063

0.811–1.393

1,413

1.034

0.815–1.312

20-29.9

689

1.557

0.990–2.450

689

1.673

1.179–2.374

689

1.198

0.898–1.599

689

1.228

0.945–1.595

≥30

366

1.643

1.023–2.640

366

1.660

1.143–2.411

366

1.264

0.918–1.742

366

1.060

0.779–1.442

p for trend

 

0.263

  

0.197

  

0.314

  

0.387

 
  1. * 1 k, 2 kHz: threshold ≥ 30 dBHL included hearing loss group, 3 k, 4 kHz: threshold ≥ 40 dBHL included hearing loss group.
  2. † Adjusted for age, working period, noise level, body mass index, mean arterial pressure, fasting blood glucose, total cholesterol, triglyceride, HDL cholesterol, hemoglobin.