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Table 2 Comparison of job-related factors preceding the on-duty fatality: CHD deaths versus trauma deaths.

From: Firefighters and on-duty deaths from coronary heart disease: a case control study

  CHD Deaths
(n = 52) % (n)
Trauma Deaths
(n = 51) % (n)
P-value OR@
(95% CI$)
Strenuous Physical Activity on the job in the preceding 12 hours 67 (35) 39 (20) 0.004 3.2 (1.4–7.2)
Possible Smoke Exposure at Incident 42 (22) 31 (16) 0.25 1.6 (0.7–3.6)
Last Job Activity:    
   Fire Suppression 36 (19) 31 (16)  
   Training 17 (9) 8 (4) 0.002 1
   Fire House 14 (7) 0  
   EMS or Other Non-Fire Emergency 12 (6) 6 (3)  
   Alarm Response 10 (5) 33 (17)  
   Returning from Alarm 10 (5) 6 (3)  
   Desk Duty (Light Duty) 2 (1) 0  
   Inspection or Investigation 0 6 (3)  
   Maintenance 0 8 (4)  
   Non-emergency Transit 0 2 (1)  
Carboxyhemoglobin Post Incident:    
   <3 % 76 (13/17) _____ _____
   3–4.9 % 18 (3/17)   
   5–10 % 6 (1/17)   
Hours on Duty Prior to Symptoms (Professionals Only):    
   0–3.9 24 (7/29) _____ _____
   4–7.9 28 (8/29)   
   8–11.9 17 (5/29)   
   12–15.9 10 (3/29)   
   16–19.9 7 (2/29)   
   20–23.9 0   
   >24 14 (4/29)   
Workshift Type (Professionals Only):    
   24 hour 34 (11/32) _____ _____
   Rotating, night or evening 23 (8/32)   
   Overtime 22 (7/32)   
   On Call 9 (3/32)   
   Regular, Daytime 6 (2/32)   
   48 hour 3 (1/32)   
  1. 1p-value for last job activity relates to the X2 test of the difference in the distribution of the proportions of firefighters in each group engaged in each of the duties described. See Table 1; @Odds ratio; $Confidence interval; ¶ Emergency medical services.