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Table 6 Comparison of actual and expected values of FEV1 and PEFR

From: Air quality index from charcoal production sites, carboxyheamoglobin and lung function among occupationally exposed charcoal workers in South Western Nigeria

  FEV1 (actual) FEV1 (expected) p value
Subjects 2.35 ± 0.73 2.82 ± 0.40 0.000
  PEFR (actual) PEFR (expected)  
Subjects 253.72 ± 103.45 529.61 ± 41.52 0.000