Vitamin D of Chinese Children and Adolescents

July 18, 2017 updated by: Lichen Yang

Vitamin D Nutritional Status and Its Related Factors for Chinese Children and Adolescents in 2010-2012

The aim of this study was to assess the vitamin D status and analyze risk factors for vitamin D inadequacy of Chinese children and adolescents aged 6-17y.

Study Overview

Status

Completed

Conditions

Detailed Description

In this study, we analyzed the vitamin D status of Chinese children and adolescents aged 6-17y, and related risk factors (such as gender, region strata, ambient UVB level at area of residence, season, and outdoor time, etc.). Serum 25 hydroxyvitamin D [25(OH)D] was measured with a radioimmunoassay kit in 15 000 children and adolescent participants in Chinese national nutrition and health survey (CNNHS) 2010-2012. Age, gender, region type, ethnicity, outdoor time, vitamin D supplementation were recorded in unified design questionnaires. Season was recorded by the date of blood taken; location was divided into north and south by China's Qinling mountains and Huaihe river; and ambient ultraviolet B (UVB) radiation level was classified according to the corresponding dose of each participant living area from National Aeronautics and Space Administration data.

Study Type

Observational

Enrollment (Actual)

15000

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Beijing
      • Beijing, Beijing, China, 100050
        • National Institute for Nutrition and Health, China CDC

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

6 years to 17 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

The participants of this study were aged 6-17y selected from the Chinese national nutrition and health survey

Description

Inclusion Criteria:

Participanted in China national nutrition and health survey (CNNHS) 2010-2012; Aged 6-17 years; Had blood taken;

Exclusion Criteria: No.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
25 hydroxyvitamin D
Time Frame: through study completion, an average of 1 year
To describe the vitamin D status,ng/mL.
through study completion, an average of 1 year

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Demographic data
Time Frame: through study completion, an average of 1 year
age, gender, ethnicity
through study completion, an average of 1 year
Environmental data
Time Frame: up to 25 weeks
season,region type, latitude, ambient ultraviolet B radiation level
up to 25 weeks
Outdoor time
Time Frame: through study completion, an average of 1 year
outdoor activity time
through study completion, an average of 1 year
Vitamin D supplementation
Time Frame: through study completion, an average of 1 year
frequency of vitamin D supplements taking for each participant
through study completion, an average of 1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Lichen Yang

Investigators

  • Study Director: Lichen Yang, National Institute for Nutrition and Health, China CDC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2010

Primary Completion (Actual)

December 30, 2013

Study Completion (Actual)

October 30, 2016

Study Registration Dates

First Submitted

July 12, 2017

First Submitted That Met QC Criteria

July 18, 2017

First Posted (Actual)

July 19, 2017

Study Record Updates

Last Update Posted (Actual)

July 19, 2017

Last Update Submitted That Met QC Criteria

July 18, 2017

Last Verified

July 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 20120212

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

The total database of CNHHS 2010-2012 including the database used in our study cannot be made public before the publication of nutrition survey monographs.

Study Data/Documents

  1. Study Protocol

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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