Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort

Sahlgrenska University Hospital

Status: Completed

Conditions: Vitamin-D Insufficiency

Study type: Observational

Funder types: Other

Identifiers

NCT02136407

EPN399-09

Details and patient eligibility

About

The purpose of this study was to study seasonal inter-individual and intra-individual variations in S-25(OH)D and to explore parameters associated with S-25-OHD in healthy Swedish adults.

Full description

Serum was collected during 12 months and analysed for 25(OH)D in 540 healthy blood donors. The blood donors answered questionnaires concerning vitamin D supplements, smoking, physical activity, sunbed use and holidays in sunny locations. Repeated serum samples were also collected from thrombocyte donors to study the intra-individual variations in S-25(OH)D.

Enrollment: 615 patients

Sex: All

Ages: 16 to 75 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• healthy at the time of donating blood

Exclusion criteria

• unhealthy

Trial design

615 participants in 2 patient groups

Blood donors

Description:

N=540

Thrombocyte donors

Description:

N=75