# A Natural History Study to Evaluate Functional and Anatomical Progression in Retinitis Pigmentosa

> **NCT04558983** · — · TERMINATED · sponsor: **Johns Hopkins University** · enrollment: 32 (actual)

## Conditions studied

- Retinitis Pigmentosa

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04558983
- **Lead sponsor:** Johns Hopkins University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** TERMINATED
- **Start date:** 2020-06-11
- **Primary completion:** 2024-12-20
- **Final completion:** 2024-12-20
- **Target enrollment:** 32 (ACTUAL)
- **Why stopped:** The study stopped because patients dropped out of the study to participate in the interventional trials. With interventional trials present there is very little interest in participating in a Natural Histoy study.
- **Last updated:** 2024-12-27


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04558983

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04558983, "A Natural History Study to Evaluate Functional and Anatomical Progression in Retinitis Pigmentosa". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04558983. Licensed CC0.

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