Vitamin D and the Influenza Epidemic

This study has been completed.
Information provided by:
University of Tromso Identifier:
First received: August 11, 2010
Last updated: July 19, 2011
Last verified: July 2011

Subjects included in ongoing vitamin d intervention trials were asked by questionnaire if they were ill with influenza during the winter season 2009/2010 to see if vitamin d supplementation prevented flu like disease.

Condition Intervention Phase
Drug: choleclaciferol
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Vitamin D and the Influenza Epidemic

Resource links provided by NLM:

Further study details as provided by University of Tromso:

Primary Outcome Measures:
  • influenza during the winter season 2009/2010 [ Time Frame: up to 30 weeks ] [ Designated as safety issue: No ]

Enrollment: 569
Study Start Date: April 2010
Study Completion Date: October 2010
Primary Completion Date: September 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: cholecalciferol
cholecalciferol in doses 800-6000 IU per day
Drug: choleclaciferol
800-6000 IU cholecalciferol per day
Placebo Comparator: placebo
placebo identical looking as cholecalciferol capsules
Drug: choleclaciferol
800-6000 IU cholecalciferol per day


Ages Eligible for Study:   20 Years to 80 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • participant in vitamin D versus placebo study

Exclusion Criteria:

  • none
  Contacts and Locations
Please refer to this study by its identifier: NCT01182870

University of Tromsø
Tromsø, Norway, 9037
Sponsors and Collaborators
University of Tromso
Principal Investigator: rolf Jorde, md University of Tromso, Norway
  More Information

No publications provided

Responsible Party: Rolf Jorde, University of Tromsø Identifier: NCT01182870     History of Changes
Other Study ID Numbers: UIT-ENDO-2010-1
Study First Received: August 11, 2010
Last Updated: July 19, 2011
Health Authority: Norway: Ethics Committee

Keywords provided by University of Tromso:
vitamin D

Additional relevant MeSH terms:
Influenza, Human
Orthomyxoviridae Infections
RNA Virus Infections
Virus Diseases
Respiratory Tract Infections
Respiratory Tract Diseases
Vitamin D
Growth Substances
Physiological Effects of Drugs
Pharmacologic Actions
Bone Density Conservation Agents processed this record on April 15, 2014