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The Egyptian Journal of Bronchology

Table 4 Distribution of patients based on Δ forced expiratory volume in first second (FEV1) after bronchodilator administration

From: Diagnostic performance of lung volumes in assessment of reversibility in chronic obstructive pulmonary disease

Δ FEV1

N= 300

No change

15 (5%)

Non-significant increase

240 (80%)

Significant increase

45 (15%)

  1. FEV1 forced expiratory volume in first second
  2. Data expressed as frequency (percentage)
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