# NHALES (Natural History of Asthma With Longitudinal Environmental Sampling)

> **NCT02327897** · — · RECRUITING · sponsor: **National Institute of Environmental Health Sciences (NIEHS)** · enrollment: 400 (estimated)

## Conditions studied

- Asthma

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT02327897
- **Lead sponsor:** National Institute of Environmental Health Sciences (NIEHS)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2015-09-10
- **Primary completion:** 2030-04-01
- **Final completion:** 2030-04-01
- **Target enrollment:** 400 (ESTIMATED)
- **Last updated:** 2026-05-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02327897

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02327897, "NHALES (Natural History of Asthma With Longitudinal Environmental Sampling)". Retrieved via AI Analytics 2026-09-01 from https://api.ai-analytics.org/clinical/NCT02327897. Licensed CC0.

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