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Table 2 Characteristics of study subjects by shift work

From: The association between shift work and hyperuricemia in steelmaking male workers

   Daytime work Shift work p-value
   (n = 276) (n = 753)
   n % n %
Age (years) 46.3 40.2 <0.001
BMI (kg/m2) 24.6 24.8 0.302
Work duration (years) 20.1 13.9 <0.001
Hyperuricemia (≥7 mg/dl)      
  Yes 72 26.1 282 37.5 <0.001 *
  No 204 73.9 471 62.5  
Hypertension      
  Yes 62 22.5 85 11.3 <0.001 *
  No 214 77.5 668 88.7  
Diabetes mellitus      
  Yes 27 9.8 56 7.4 0.221*
  No 249 90.2 697 92.6  
Hyperlipidemia      
  Yes 93 33.7 198 26.3 0.020 *
  No 183 66.3 555 73.7  
Liver enzyme abnormality      
  Yes 60 21.7 158 21.0 0.792*
  No 216 78.3 595 79.0  
Impaired renal function      
  Yes 144 52.2 290 38.5 <0.001 *
  No 132 47.8 463 61.5  
Smoking      
  Never-smoker or ex-smoker 153 55.4 403 53.5 0.585*
  Current smoker 123 44.6 350 46.5  
Sufficient physical activity      
  Yes§ 100 36.2 224 29.7 0.047 *
  No 176 63.8 529 70.3  
Consumption of alcohol      
  Moderate drinker 181 65.6 516 68.5 0.370*
  High drinker 95 34.4 237 31.5  
  1. *Calculated by chi-square test.
  2. Calculated by t-test.
  3. EGFR <90 mL/min/1.73 m2.
  4. §Vigorous-intensity physical activity more than three times per week or moderate-intensity physical activity more than five times per week.
  5. drink alcohol more than two times per week and seven glasses per time.
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