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Table 3 Comparison of serum prostate-specific antigen levels by work type of the subjects

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

  n (%) Serum PSA (ng/mL)
Geometric mean ± GSD* p-value Adjusted geometric mean p-value
All      
 Production workers 1,699 (86.8) 0.745 ± 1.820 0.014 0.738 0.017
 Office workers 259 (13.2) 0.814 ± 1.740   0.813  
Age < 50      
 Production workers 1,699 (86.8) 0.722 ± 1.810 0.842 0.723 0.924
 Office workers 259 (13.2) 0.729 ± 1.711   0.727  
Age ≥ 50      
 Production workers 1,699 (86.8) 0.794 ± 1.888 <0.001 0.738 <0.001
 Office workers 259 (13.2) 1.033 ± 2.083   0.813  
  1. *GSD: geometric standard deviation.
  2. P value was calculated by T-test.
  3. P value was calculated by ANCOVA, adjusted for age, body mass index, hypertension, current smoking, heavy drinker, regular exercise.
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