Clinical trial · Observational
Vitamin D Levels and Survival in Cancer Patients
Association of Pre-diagnostic Vitamin D Levels and Survival in Older Individuals With Cancer
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Using the population-based data sources in Iceland and the well-characterized AGES-Reykjavik cohort, our overarching aims are on exploring whether pre-diagnostic serum levels of 25-hydroxyvitamin D (25(OH)D) among older individuals living in Iceland were associated with survival after cancer diagnosis. We also wanted to assess the risk of being diagnosed with cancer in association with 25(OH)D levels. In this population living just south of the arctic circle, vitamin D levels largely depend on dietary- and supplemental sources.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Neoplasms | Neoplasm | ONTOLOGY_EXACT | 0.90 |
Interventions
Interventions (0)
Data not yet available
Design
Arms and outcomes
Arms (0)
[]Primary outcomes (1)
- measure
- Overall mortality among cancer patients
- timeFrame
- Patients were followed from date of diagnosis since 2002 until death or censored at end of the follow-up (December 31, 2014)
- description
- We tested the association between pre-diagnostic 25(OH)D levels and total survival
Secondary outcomes (1)
- measure
- Cancer-specific mortality among cancer patients
- timeFrame
- Patients were followed from date of diagnosis since 2002 until death or censored at end of the follow-up (December 31, 2014)
- description
- We tested the association between pre-diagnostic 25(OH)D levels and cancer survival
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 66 Years
- Maximum age
- 98 Years
Show eligibility criteria text
Inclusion Criteria: To be part of the AGES-Reykjavik Study, initiated between 2002 and 2006. Exclusion Criteria: Diagnosed with cancer at study entry
References
Publications (0)
Data not yet available