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Table 4 Symptom complaints of early and late patients

From: Acute Symptoms after a Community Hydrogen Fluoride Spill

  Early patients * Late patients Total p-value
N % N % N %  
Cough 27 15.3 791 46.1 818 43.3 0.000
Sore throat 64 36.4 741 43.2 805 42.6 0.079
Headache 47 26.7 745 43.5 792 41.9 0.000
Eye irritation 35 19.9 536 31.3 571 30.2 0.002
Nausea 25 14.2 327 19.1 352 18.6 0.114
Shortness of breath 54 30.7 252 14.7 306 16.2 0.000
Dizziness 9 5.1 260 15.2 269 14.2 0.000
Chest pain 5 2.8 102 6.0 107 5.7 0.089
Skin burning 5 2.8 77 4.5 82 4.3 0.306
Skin rash 1 0.6 65 3.8 66 3.5 0.027
Vomiting 2 1.1 45 2.6 47 2.5 0.227
Total 176 100.0 1714 100.0 1890 100.0  
  1. * Early patients: hospital visit within 3 days.
  2. † Late patients: hospital visit 4 days or after.
  3. ‡ Chi-squared test.