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- Rim Kammoun, Ines Ghannouchi, Sonia Rouatbi, and Helmi Ben Saad.
- a Department of Physiology and Functional Explorations , Farhat HACHED Hospital , Sousse , Tunisia.
- Libyan J Med. 2018 Dec 1; 13 (1): 14877511487751.
AbstractAn obstructive ventilatory defect (OVD) is defined by a low forced expiratory volume/'forced/slow' vital capacity (FEV1/FVC) (e.g.
70%), moderate (60-69%), moderately severe (50-59%), severe (35-49%), and very severe (<35%) and GLI (FEV1 Z-score): mild (≥ -2.0), moderate (-2.0 to -2.5), moderately severe (-2.5 to -3.0), severe (-3.0 to -4.0), and very severe (<-4.0). The frequencies of OVD were 14.4% (ATS/ERS method) and 10.5% (GLI method) (p < 0.05). Among the 103 participants having an OVD according to the two methods, the severity classification was mild (34.95% vs. 37.86%, p < 0.05), moderate (25.24% vs. 18.45%, p < 0.05), moderately severe (23.30% vs. 15.53%, p = 0.144), severe (9.71% vs. 20.39%, p < 0.05), and very severe (6.80% vs. 7.77%, p = 0.785), respectively for the ATS/ERS and GLI classifications. The two OVD definitions were not exchangeable. Moreover, the two grading severity systems misclassified the OVD grades. Notes
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