Observational studyInternational journal of chronic obstructive pulmonary disease2026
Reliability of Pulmonary Function Tests in Patients with Chronic Obstructive Pulmonary Disease.
Observational study in International journal of chronic obstructive pulmonary disease, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
1 citing paper in PubMed.
- Early identification of PRISm from chest CT: a multimodal for three-class stratification of normal, PRISm, and COPD.Frontiers in radiology · 2026Article
Corrections and comments
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Authors and funding
15 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Introduction: Chronic Obstructive Pulmonary Disease (COPD) is frequently underdiagnosed due to limited use and suboptimal quality of spirometry. Methods: This multicenter, prospective observational study aimed to assess the quality of spirometry tests in COPD patients across six tertiary care centers in Turkey. A total of 560 spirometry tests were independently evaluated by two pulmonologists, and inter-rater reliability was analyzed using Cohen's Kappa. Results: The study included 124 women and 436 men, with a mean age of 65.9±10.2 years. Spirometry patterns were interpreted as obstructive in 79.1% of tests, restrictive in 5.7%, mixed in 2.7%, normal in 6.7%, inconclusive in 5.5%, and as upper airway obstruction in 0.18% of cases ( Conclusion: Spirometry reports frequently lack key information such as preliminary diagnoses, test indication, technician, and device details. ECSC is the most commonly used reference. Rates of inconclusive and erroneous tests-due to variable or insufficient effort, mouth leak, mouthpiece obstruction, and rapid expiration-are low.
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Registered trials
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