# Vitamin D Levels and Heart Rate Variability on Endothelial Function Via RAAS Augmentation in OSA

> **NCT05232201** · — · UNKNOWN · sponsor: **University Malaysia Sarawak** · enrollment: 150 (estimated)

## Conditions studied

- Obstructive Sleep Apnea

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT05232201
- **Lead sponsor:** University Malaysia Sarawak
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2022-02
- **Primary completion:** 2024-08
- **Final completion:** 2024-08
- **Target enrollment:** 150 (ESTIMATED)
- **Last updated:** 2022-02-09


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05232201

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05232201, "Vitamin D Levels and Heart Rate Variability on Endothelial Function Via RAAS Augmentation in OSA". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT05232201. Licensed CC0.

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