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Completed

NCT Number: NCT00973583

Vitamin D Supplementation for the Prevention of Acute Respiratory Tract Infections

The investigators earlier clinical study in 754 young Finnish men demonstrated a significant negative association of serum 25-OHD concentration with acute respiratory tract infections. The present study aimed to determine whether vitamin D supplementation may decrease the incidence of acute respiratory tract infections.

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Key information

Conditions

Respiratory Tract Infections Infections Respiratory Tract Diseases

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

university of Tampere

Tampere, 33014, Finland

About this study

Subjects comprised 164 male conscripts at a military base in Finland. Half of the participants were randomly allocated to receive 400 IU vitamin D daily and half received placebo from October through March. Serum vitamin D and plasma parathyroid hormone concentrations were determined. Subjects were followed for 6 months and the primary outcome was the number of days absent from duty due to ARTI.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Exclusion criteria

  • Use vitamin D

Treatment and study plan

Vitamin D

Dietary Supplement

vitamin D3 400 IU daily

Other names: Minisun

Placebo

Dietary Supplement

placebo

Other names: Pharmia, Finland

Primary outcomes

  1. Number of days absent from duty due to respiratory tract infection

    Time frame: 6 months

Secondary outcomes

  1. The proportion of men remaining healthy throughout the 6-month study period

    Time frame: 6 months

  2. The number needed to treat calculated from the proportion of men without any days absent from duty

    Time frame: 6 months

Sponsors and collaborators

Lead sponsor

Tampere University

Other

Collaborators

  • Finnish Defense Forces

Registry information

Official study title

Vitamin D Supplementation for the Prevention of Acute Respiratory Tract Infections; a Randomized Double-blinded Trial in Young Finnish Men

Important dates

Study start
2005
Primary completion
2009
Study completion
2010
First posted
Sep 9, 2009
Registry last updated
Dec 3, 2014

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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