How Much UVB Radiation is Necessary to Maintain Summer Vitamin D Level During Winter?
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 75
- 试验地点
- 1
- 主要终点
- Vitamin D (nmol/l)
研究概览
简要总结
The purpose of the study is to determine the frequency of UVB radiations necessary to maintain the Vitamin D level during winter time.
详细描述
The work is addressing vitamin D production after UVB exposure and explore how much UVB radiation which is necessary to maintain a sufficient vitamin D level during the winter period in Denmark. 4 different UVB exposure times and 2 different UVB doses to 2 different body surface areas.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •18-65 years
排除标准
- •Sun bed use
- •Holiday or business travel south of 45 degrees latitude during trial
- •Drug addiction
- •Pregnancy
- •Lactating
研究组 & 干预措施
Group 1
Body surface area: 88 %
干预措施: Broadband UVB (Radiation)
Group 2
Body surface area: 22 %
干预措施: Broadband UVB (Radiation)
Group 3
Body surface area: 88 %
干预措施: Broadband UVB (Radiation)
Group 4
Body surface area: 88 %
干预措施: Broadband UVB (Radiation)
Group 5
Body surface area: 0 %
干预措施: Control group (Other)
结局指标
主要结局
Vitamin D (nmol/l)
时间窗: Monthly during 4 months
Vitamin D measured in a blood sample to define the relationship between frequency of UVB radiations and the Vitamin D level.
次要结局
- Parathyroideahormone (pmol/l)(4 months)