# Cohort Study of Airway Microecology and the Pathogenesis and Evolution of Chronic Obstructive Pulmonary Disease

> **NCT04849104** · — · ACTIVE_NOT_RECRUITING · sponsor: **Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University** · enrollment: 210 (estimated)

## Conditions studied

- Chronic Obstructive Pulmonary Disease

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04849104
- **Lead sponsor:** Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2021-02-26
- **Primary completion:** 2026-12-31
- **Final completion:** 2026-12-31
- **Target enrollment:** 210 (ESTIMATED)
- **Last updated:** 2026-04-14


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04849104

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04849104, "Cohort Study of Airway Microecology and the Pathogenesis and Evolution of Chronic Obstructive Pulmonary Disease". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04849104. Licensed CC0.

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