Randomized trial of vitamin D supplementation to prevent seasonal influenza infection in inflammatory bowel disease patients.

Randomized trial of vitamin D supplementation to prevent seasonal influenza infection in inflammatory bowel disease patients. - Randomized trial of vitamin D supplementation to prevent seasonal influenza infection in inflammatory bowel disease patients.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000014743

Enrollment

240

Registered

2014-08-01

Start date

2014-08-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

inflammatory bowel disease

Interventions

VitaminD3 Placebo

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Person who agreed to participate in the trial with written form of consent 2. Nothing correspond to excluding criteria

Exclusion criteria

Exclusion criteria: 1. Person who was already infected with influenza virus infection since May 2014. 2. Person who has past history of urinary tract stone 3. Person who is taking vitamin D supplement 5. Person who has drug allergy including Vitamin D supplement or serious allergy

Design outcomes

Primary

Measure	Time frame
doctor diagnosed influenza virus infection	—

Secondary

Measure	Time frame
upper and lower respiratory symptoms influenza antibody titer subgroup analysis of Vitamin D receptor polymorphism	—

Countries

Japan

Contacts

Public ContactMitsuyoshi Urashima

Jikei University School of Medicine Division of Molecular Epidemiology

urashima@jikei.ac.jp03-3433-1111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026