Long Term Effects of Calcium on Bone Mass in Young Females
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 354
- 试验地点
- 2
研究概览
简要总结
We originally suggested that calcium in the diet is important in determining the amount of bone (bone mass) that builds up in young adults. We are testing the effect of calcium on bone mass in 354 Caucasian (white) girls. At the start of this 7-year study, the average age of the girls was 11 years, and they had not yet reached puberty. The study will also provide information about the effect of calcium on body composition (body fat) and blood pressure in young women.
We have been giving calcium to one group of participants in this study and giving a placebo (an inactive pill, or "sugar pill") to the other group. The results of this research will be important in preventing osteoporosis, because building more bone as a young person should reduce a woman's chances of developing osteoporosis later in life.
详细描述
This study evaluates the effect of calcium on bone mass accretion over 7 years in a cohort of 354 young females who were in pubertal Stage II at the start of the study. The average age of study participants at entry was 11 years; at the end of the study participants were 18 years old.
The study looks at skeletal development under the influence of heredity, nutrition (calcium), and physical exercise. We gave calcium to participants in one arm of this clinical trial calcium. Participants in the other arm of the trial were given a placebo. The main outcome variable is the bone mass measured at different skeletal regions.
The study will also provide data about the efficacy of calcium supplementation with regard to hypertension prevention and obesity. The results of this research will be important in preventing osteoporosis.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Single Group
- 主要目的
- Prevention
- 盲法
- Double
入排标准
- 年龄范围
- 8 Years 至 13 Years（Child）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Pubertal stage II
- •Calcium intake below a threshold level
- •Caucasian
- •Normal health
排除标准
- •Medications affecting calcium and bone metabolism
- •Chronic diseases
- •Metabolic bone disease
- •Abnormality in calcium metabolism