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Table 3 CV event risk of bus drivers by occupational factors

From: Cardiovascular Disease Risk of Bus Drivers in a City of Korea

   CV event risk   P-value
    Low   Medium   High   Total  
Employed type          
  Regular 158 (45.9) 149 (43.3) 37 (10.8) 344 (100.0) 0.044
  Irregular 40 (44.9) 31 (34.8) 18 (20.2) 89 (100.0)  
Shift Pattern          
  Double 155 (46.5) 145 (43.5) 33 (9.9) 333 (100.0) 0.005
  Alternate 43 (43.0) 35 (35.0) 22 (22.0) 100 (100.0)  
PDAR          
  <0.5 127 (49.8) 104 (40.8) 24 (9.4) 255 (100.0) 0.022
  ≥0.5 71 (39.9) 76 (42.7) 31 (17.4) 178 (100.0)  
  1. *p-value were tested by chi-square test.
  2. PDAR, professional driving duration/age ratio.
  3. Cardiovascular disease event as stroke or myocardial infarction.
  4. High; both metabolic syndrome and CHD risk equivalent, Medium; one of the two, Low; neither metabolic syndrome nor CHD risk equivalent.