# Natural History of Sickle Cell Disease

> **NCT00081523** · — · RECRUITING · sponsor: **National Heart, Lung, and Blood Institute (NHLBI)** · enrollment: 3500 (estimated)

## Conditions studied

- Pain Crisis

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00081523
- **Lead sponsor:** National Heart, Lung, and Blood Institute (NHLBI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2004-04-29
- **Primary completion:** —
- **Final completion:** —
- **Target enrollment:** 3500 (ESTIMATED)
- **Last updated:** 2026-05-07


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00081523

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00081523, "Natural History of Sickle Cell Disease". Retrieved via AI Analytics 2026-07-06 from https://api.ai-analytics.org/clinical/NCT00081523. Licensed CC0.

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