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Completed

NCT Number: NCT03221972

Vitamin D of Chinese Children and Adolescents

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.

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Key information

Conditions

Vitamin D Deficiency Avitaminosis Deficiency Diseases Malnutrition Nutrition Disorders Nutritional and Metabolic Diseases

Age range

6 year–17 year

Sex eligibility

All sexes

Study type

Observational

Primary location

National Institute for Nutrition and Health, China CDC

Beijing, Beijing Municipality, 100050, China

About this study

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.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

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

Exclusion criteria

No.

Treatment and study plan

Primary outcomes

  1. 25 hydroxyvitamin D

    Time frame: through study completion, an average of 1 year

    To describe the vitamin D status,ng/mL.

Secondary outcomes

  1. Demographic data

    Time frame: through study completion, an average of 1 year

    age, gender, ethnicity

  2. Environmental data

    Time frame: up to 25 weeks

    season,region type, latitude, ambient ultraviolet B radiation level

  3. Outdoor time

    Time frame: through study completion, an average of 1 year

    outdoor activity time

  4. Vitamin D supplementation

    Time frame: through study completion, an average of 1 year

    frequency of vitamin D supplements taking for each participant

Sponsors and collaborators

Lead sponsor

Lichen Yang

Other Gov

Registry information

Official study title

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

Important dates

Study start
2010
Primary completion
2013
Study completion
2016
First posted
Jul 19, 2017
Registry last updated
Jul 19, 2017

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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