# The Prevalence of Small Airways Dysfunction In COPD Patients and The Impact on COPD Control

> **NCT04384133** · NA · UNKNOWN · sponsor: **Sibel Naycı** · enrollment: 170 (actual)

## Conditions studied

- COPD
- Small Airway Disease

## Interventions

- **DIAGNOSTIC_TEST:** Impulse oscillometry
- **DIAGNOSTIC_TEST:** Spirometric pulmonary function test
- **DIAGNOSTIC_TEST:** Fractional exhaled nitric oxide (FENO) test
- **DIAGNOSTIC_TEST:** Thorax Computed Tomography
- **DIAGNOSTIC_TEST:** Chest X Ray
- **DIAGNOSTIC_TEST:** Blood eosinophil level
- **OTHER:** CAT
- **OTHER:** mMRC

## Key facts

- **NCT ID:** NCT04384133
- **Lead sponsor:** Sibel Naycı
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2019-10-01
- **Primary completion:** 2020-09-01
- **Final completion:** 2021-04-01
- **Target enrollment:** 170 (ACTUAL)
- **Last updated:** 2020-05-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04384133

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04384133, "The Prevalence of Small Airways Dysfunction In COPD Patients and The Impact on COPD Control". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT04384133. Licensed CC0.

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