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Table 1 Characteristics of the study subjects

From: Acute respiratory symptoms and evacuation-related behavior after exposure to chlorine gas leakage

Variables Total (n = 47) Low exposure (n = 20) High exposure (n = 27)
n % n % n %
Age (year)    
 Mean ± SD* 41.70 ± 9.27 37.90 ± 9.89 45.00 ± 8.19
Tenure (year)    
 Mean ± SD 2.55 ± 1.80 2.45 ± 1.96 2.63 ± 1.71
Exposure time (minute)    
 Median (range)** 10 (1–30) 2 (1–8) 10 (10–30)
Lasting respiratory symptoms (day)    
 Median (range)** 1 (0–25) 1 (0–5) 2 (0–25)
Sex    
 Male 39 83.0 17 85.0 22 81.5
 Female 8 17.0 3 15.0 5 18.5
Smoking status       
 Never 20 42.6 10 50.0 10 37.0
 Current 22 46.8 10 50.0 12 44.4
 Former 5 10.6 0 0.0 5 18.5
Preexisting disease       
 None 44 93.6 19 95.0 25 92.6
 Asthma or COPD 0 0.0 0 0.0 0 0.0
 Hypertension 2 4.3 0 0. 2 7.4
 Dermatologic disease 1 2.1 1 5.0 0 0.0
  1. *p value <0.05 by t-test
  2. **p value <0.05 by Mann-Whitney U test