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Table 1 General characteristics of the subjects

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

  Production workers (n = 1,699) Office workers (n = 259) p-value*
n (%) n (%)
Age (years)      
 30-39 291 (17.1) 111 (42.9) 0.008
 40-49 792 (46.6) 78 (30.1)  
 50- 616 (36.3) 70 (27.0)  
Waist circumference (cm)      
 <90 1,268 (74.6) 181 (69.9) 0.105
 ≥90 431 (25.4) 78 (30.1)  
Body mass index (kg/m2)      
 <25 1,013 (59.6) 129 (49.8) 0.009
 ≥25 686 (40.4) 130 (50.2)  
Hypertension      
 No 1,519 (89.4) 226 (87.3) 0.304
 Yes 180 (10.6) 33 (12.7)  
Diabetes mellitus      
 No 1,538 (90.5) 244 (94.2) 0.057
 Yes 161 (9.5) 15 (5.8)  
Total cholesterol (mg/dL)      
 <240 1,605 (94.5) 234 (90.3) 0.007
 ≥240 94 (5.5) 25 (9.7)  
Triglyceride (mg/dL)      
 <150 995 (58.6) 151 (58.3) 0.936
 ≥150 704 (41.4) 108 (41.7)  
HDL-cholesterol (mg/dL)      
 ≥40 1,327 (78.1) 200 (77.2) 0.404
 <40 372 (21.9) 59 (22.8)  
Current smoking      
 No 894 (52.6) 146 (56.4) 0.253
 Yes 805 (47.4) 113 (43.6)  
Heavy drinker      
 No 1,262 (74.3) 183 (70.7) 0.212
 Yes 437 (25.7) 76 (29.3)  
Regular exercise      
 No 1,262 (74.2) 215 (83.0) 0.018
 Yes 437 (25.8) 44 (17.0)  
  1. *P value was calculated by chi-square test.
  2. HDL-cholesterol: High density lipoprotein cholesterol.
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