# Longitudinal Observational Study of Severe Asthma

> **NCT01780142** · — · COMPLETED · sponsor: **National Heart, Lung, and Blood Institute (NHLBI)** · enrollment: 171 (actual)

## Conditions studied

- Asthma

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT01780142
- **Lead sponsor:** National Heart, Lung, and Blood Institute (NHLBI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2013-03-01
- **Primary completion:** 2024-09-12
- **Final completion:** —
- **Target enrollment:** 171 (ACTUAL)
- **Last updated:** 2026-05-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01780142

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01780142, "Longitudinal Observational Study of Severe Asthma". Retrieved via AI Analytics 2026-08-20 from https://api.ai-analytics.org/clinical/NCT01780142. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*