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Completed

NCT Number: NCT00812448

Catechin Containing Mask for the Prevention of Influenza Infection

The purpose of this study is to evaluate the effects of catechin extracts containing mask on prevention of influenza infection.

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Key information

Conditions

Influenza Infection

Age range

20 year–85 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan

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About this study

Catechins are the major components of tea flavonoids and are reported to possess physiological activities such as antiviral effects. Recent in-vitro experimental studies have revealed that tea catechin extracts possess the effects on the prevention of influenza infection. However, a limited number of studies have been conducted on the clinical effects. Based on these backgrounds, we designed a prospective randomized controlled study to evaluate the effects of tea catechin extracts containing mask on the prevention of influenza infection.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Possible to wearing mask for three months
  • Possible to fill out a questionnaire personally
  • Obtained written informed consent before participation

Exclusion criteria

  • Possessing some infectious diseases in need of therapy
  • Possessing tea or catechin allergy
  • diagnosed as inadequate for other reasons to participate the study by principal investigator

Treatment and study plan

tea catechin extracts

Dietary Supplement

catechins are composed of tea catechin extracts available in grren tea supplements

Primary outcomes

  1. the incidence rate of influenza infection during the study

    Time frame: assessed at each month

Secondary outcomes

  1. the incidence rates of upper respiratory tract infections

    Time frame: assessed at each month

  2. the severity of the symptoms and the duration of the cold among incident cases

    Time frame: assessed at each month

  3. he incidence-free time for influenza or upper respiratory tract infections after the intervention

    Time frame: assessed at each month

Sponsors and collaborators

Lead sponsor

University of Shizuoka

Other

Collaborators

  • Hamamatsu University
  • Seirei Hamamatsu General Hospital

Registry information

Official study title

The Effects of Tea Catechin Extracts Containing Mask on the Prevention of Influenza Infection

Important dates

Study start
2008
Primary completion
2009
Study completion
2009
First posted
Dec 22, 2008
Registry last updated
Nov 26, 2009

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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