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Table 4 The odds of having a serum PSA level of ≥4.0 or 2.5 ng/mL based on work type of the subjects

From: Serum prostate-specific antigen levels and type of work in tire manufacturing workers

  PSA < threshold PSA ≥ threshold Crude OR 95% CI Adjusted OR 95% CI*
n (%) n (%)
PSA threshold 4.0 ng/mL       
All       
 Production workers 1,690 (99.5) 9 (0.5) 1.00   1.00  
 Office workers 251 (96.9) 8 (3.1) 5.98 2.29-15.65 7.73 2.78-21.46
Age < 50       
 Production workers 1,079 (99.6) 4 (0.4) 1.00   1.00  
 Office workers 187 (99.5) 1 (0.5) 1.44 0.16-12.97 2.372 0.24-22.84
Age ≥ 50       
 Production workers 611 (99.2) 5 (0.8) 1.00   1.00  
 Office workers 64 (90.1) 7 (9.9) 13.37 4.13-43.33 12.90 3.65-45.64
PSA threshold 2.5 ng/mL       
All       
 Production workers 1,655 (97.4) 44 (2.6) 1.00   1.00  
 Office workers 244 (94.2) 15 (5.8) 2.31 1.27-4.21 2.74 1.49-5.08
Age < 50       
 Production workers 1,058 (97.7) 25 (2.3) 1.00   1.00  
 Office workers 182 (96.8) 6 (3.2) 1.40 0.57-3.44 1.89 0.74-4.85
Age ≥ 50       
 Production workers 597 (96.9) 19 (3.1) 1.00   1.00  
 Office workers 62 (87.3) 9 (12.7) 4.56 1.98-10.51 3.90 1.64-9.25
  1. *Odds ratio and 95% confidence intervals estimated using logistic regression model adjusted for adjusted for age, body mass index, hypertension, current smoking, heavy drinker, regular exercise.
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