Vitamin D of Chinese Children and Adolescents

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

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT03221972

Enrollment

15000

Registered

2017-07-19

Start date

2010-01-01

Completion date

2016-10-30

Last updated

2017-07-19

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

Conditions

Vitamin D Deficiency

Keywords

25 hydroxyvitamin D, 6-17 years old, vitamin D deficiency

Brief summary

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.

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.

Interventions

None listed

Study design

Observational model

OTHER

Time perspective

CROSS_SECTIONAL

Eligibility

Sex/Gender

ALL

Age

6 Years to 17 Years

Healthy volunteers

Inclusion criteria

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

Exclusion criteria

No.

Design outcomes

Primary

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

Secondary

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

Countries

China

Outcome results