# Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort

> **NCT02136407** · — · COMPLETED · sponsor: **Sahlgrenska University Hospital** · enrollment: 615 (actual)

## Conditions studied

- Vitamin-D Insufficiency

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT02136407
- **Lead sponsor:** Sahlgrenska University Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2009-10
- **Primary completion:** 2010-09
- **Final completion:** 2010-09
- **Target enrollment:** 615 (ACTUAL)
- **Last updated:** 2014-05-13


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02136407

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02136407, "Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT02136407. Licensed CC0.

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