Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 615
- 试验地点
- 1
- 主要终点
- Inter-individual and intra-individual varations in serum 25-hydroxy vitamin-D during different seasons.
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 16 Years 至 75 Years（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •healthy at the time of donating blood
排除标准
- •unhealthy
结局指标
主要结局
Inter-individual and intra-individual varations in serum 25-hydroxy vitamin-D during different seasons.
时间窗: Group1:Blood donors, single test, 25(OH)vit D at inclusion . Group 2: thrombocyte donors: multiple tests, serum 25(OH)vit D during 8 months.
次要结局
未报告次要终点
研究者
Eva Klingberg
MD, PhD
Sahlgrenska University Hospital, Sweden