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Table 6 Analysis of the results of the electrolyte analysis, pulmonary function test, electrocardiography, and chest radiography according to distance from the accident site

From: Acute Symptoms in Firefighters who Participated in Collection Work after the Community Hydrogen Fluoride Spill Accident

Characteristic Less than 100 m (N = 140) 100 m-1 Km (N = 173) More than 1 Km (N = 35) p-value*
  Mean ± SD Mean ± SD Mean ± SD  
Serum electrolyte     
  Calcium (mg/dL) 9.41 ± 0.37 9.41 ± 0.37 9.45 ± 0.36 0.579
  Phosphorus (mg/dL) 3.44 ± 0.70 3.44 ± 0.46 3.37 ± 0.35 0.767
Spirometry     
  FVC (L) 4.50 ± 0.67 4.36 ± 0.75 4.59 ± 0.86 0.019
  FVC% (%) 90.57 ± 10.01 90.68 ± 11.35 95.66 ± 11.43 0.019
  FEV1 (L) 3.67 ± 0.60 3.55 ± 0.62 3.64 ± 0.67 0.060
  FEV1% (%) 91.80 ± 10.97 92.54 ± 11.61 95.60 ± 12.58 0.104
  FEV1/FVC 81.63 ± 6.56 81.58 ± 6.02 79.45 ± 6.05 0.257
  FEF25-75 (L) 3.70 ± 1.08 3.59 ± 0.97 3.40 ± 0.97 0.366
  FEF25-75% (%) 95.20 ± 24.59 97.57 ± 23.85 94.80 ± 27.98 0.568
  1. *Adjusted for age, sex, smoking, time of hospital visit, time of working at accident spot, and respirator protector using ANCOVA test.
  2. FVC, forced vital capacity; FVC%, FVC percent; FEV1, 1 second forced expiratory volume.
  3. FEV1; FEV1 percent, FEF25-75, forced expiratory flow rate25-75; FEF25-75%; FEF25-75 percent.