Sunlight Exposure and Vitamin D in Children

Sunlight Exposure and Vitamin D Status of Children in the UK

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01477827

Enrollment

125

Registered

2011-11-23

Start date

2010-06-30

Completion date

2012-07-31

Last updated

2013-01-16

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

Conditions

Healthy Schoolchildren

Brief summary

The purpose of this study is to examine the amount of sunlight exposure and vitamin D status of adolescent schoolchildren in each season throughout the year.

Interventions

OTHERNone - observational study

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

12 Years to 15 Years

Healthy volunteers

Yes

Inclusion criteria

* Healthy school children aged 12-15 years * White Caucasian * Male or female

Exclusion criteria

* History of photosensitivity disorder

Design outcomes

Primary

Measure	Time frame
Serum concentration of 25-hydroxyvitamin D	Approximately every 3 months

Secondary

Measure	Time frame	Description
Amount of sunlight exposure received	Approx every 3 months	Exposure to sunlight over 7 consecutive days is measured using polysulphone badges with one badge for weekdays and a second badge for the weekend.
Dietary intake of vitamin D	Approximately every 3 months	Intake of foods containing vitamin D is recorded for a one week period and the average daily intake determined.

Countries

United Kingdom

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026