Development and validation of a pulmonary function test data extraction tool for the US department of veterans affairs electronic health record

Table 1 Classification of obstruction (reduced FEV1:FVC ratio) and degree of FEV1 impairment among PFTs with extracted results

Cross-tabulation of FEV1:FVC ratio and FEV₁ results. FEV₁ categorized as normal (≥ 80% percent predicted), mild (70–79% percent predicted), moderate (60–69% percent predicted), moderately severe (50–59% percent predicted), severe (35–49% percent predicted), or very severe (< 35% percent predicted). Abbreviations: FEV₁ = forced expiratory volume in one second; FVC = forced vital capacity; PFT = pulmonary function test; VA = Veterans Affairs

ISSN: 1756-0500