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Table 1 Characteristics of non-hospitalized patients with respect to the distance from the accident spot

From: Acute health effects of accidental chlorine gas exposure

  Within 100 m Beyond 100 m Total p-value*
n % n % n %  
Sex        0.639
 Male 55 75.3 94 72.3 149 73.4  
 Female 18 24.7 36 27.7 54 26.6  
Age        0.095
 <29 years 26 35.6 34 26.2 60 29.6  
 30–39 years 25 34.2 51 39.2 76 37.4  
 40–49 years 20 27.4 30 23.1 50 24.6  
 >50 years 2 2.7 15 11.5 17 8.4  
Exposure type        0.016
 Workers 43 58.9 68 52.3 111 54.7  
 Adjacent residents 25 34.2 33 25.4 58 28.6  
 Firefighters and officer 1 1.4 2 1.5 3 1.5  
 Others 4 5.5 27 20.8 31 15.3  
Smoking        0.020
 Non-smoking 60 82.2 87 66.9 147 72.4  
 Smoking 13 17.8 43 33.1 56 27.6  
Time of 1 st hospital visit        0.099
 1st day 42 57.5 100 76.9 142 70.0  
 2nd day 24 32.9 14 10.8 38 18.7  
 After 3rd day 7 9.6 16 12.3 23 11.3  
Period of stay        <0.001
 Within 1 h 22 30.1 22 18.4 44 22.7  
 1–2 h 32 43.8 27 20.8 59 29.1  
 2–4 h 4 5.5 20 15.4 24 11.8  
 4–6 h 5 6.8 43 33.1 48 23.6  
 >6 h 10 13.7 16 12.3 26 12.8  
  1. *Chi-squared test.