Predictive Questionnaire for Vitamin D Insufficiency in Healthy Adults
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|ClinicalTrials.gov Identifier: NCT02408679|
Recruitment Status : Completed
First Posted : April 3, 2015
Last Update Posted : April 3, 2015
|Condition or disease||Intervention/treatment|
|Healthy Volunteers||Procedure: Blood sampling Other: Predictive questionnaire for vitamin D insufficiency|
|Study Type :||Observational|
|Actual Enrollment :||300 participants|
|Official Title:||A Study to Validate a Predictive Questionnaire for Vitamin D Insufficiency in Healthy Adults|
|Study Start Date :||January 2015|
|Actual Primary Completion Date :||February 2015|
|Actual Study Completion Date :||February 2015|
300 eligible subjects will perform a blood sampling for a dosage of serum vitamin D and will fill up a study questionnaire during one visit.
Procedure: Blood sampling
One blood sampling will be performed for a serum vitamin D dosage. The volume of blood collected will not exceed 4 ml.
Other: Predictive questionnaire for vitamin D insufficiency
The questionnaire includes 19 questions concerning the following topics : a) sun exposure, b) living situation, c) eating habits and Vitamin D dietary intakes. In addition, two questions will capture demographic data.
- Questionnaire internal validity [ Time Frame: Day 1 ]Evaluation of the internal coherence and factorial structure of the questionnaire, establishment of scoring rules
- Questionnaire external validity [ Time Frame: Day 1 ]Prediction of the vitamin D status (threshold value, sensitivity, specificity for vitamin D insufficiency; threshold value, sensitivity, specificity for vitamin D deficiency)
- Confounding factors (demographic data) [ Time Frame: Day 1 ]Interests for coupling the study questionnaire and demographic data (age, gender, Body Mass Index, phototype).
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02408679
|Clinical Nutrition Center Naturalpha (CNCN)|
|Lille, France, 59020|
|Study Director:||Sylvie BRETON, R&D Innovation Manager||Lesieur, France|
|Principal Investigator:||Xavier Deplanque, MD||Clinical Nutrition Center Naturalpha, France|