OSTEOPOROSIS PREVENTION IN PREADOLESCENT GIRLS (BE A STAR! BANK ON YOUR BONES!)

我们开发了一种创新的行为/教育干预措施 减少青春期前骨质疏松症的可改变危险因素 女孩们。拟议研究的目的是证明其疗效。 增加膳食钙摄入水平的干预措施 快速增长阶段高危人群中的负重运动 骨量的增加--具体地说，月经前童子军 10岁和12岁。将使用整群随机化来随机选择女孩 童子军要么进行干预，要么只接受教育计划。 18名女童子军士兵(144名女孩)将被随机分配到每支部队 (即每支部队估计有8名女孩参加)。干预措施 由使用各种媒体(即开销)的3个交互式会话组成 透明胶片、图形和三维演示)演示 教学材料。主题包括对骨质疏松症的解释和 其可改变和不可改变的危险因素，预防骨质疏松症 选择健康的食物(即高钙、低脂肪的食物)，以及 通过负重运动预防骨质疏松(具体地说， 跳绳。)每个女孩都会得到一张五颜六色的三日星图 用于轻松自我监控她在实现1350目标的过程中的图表 每天摄入100毫克的钙。星形贴纸代表一份大小的 含钙150毫克(1星)或300毫克(2星)的食物。 “明星锻炼金字塔”类似地允许简单的自我监测 负重活动将由代表5、10或 每周15分钟的负重锻炼。激励措施包括 给了女孩们来加强干预课程的内容-- 例如，一个食物金字塔磁铁，一个带有1杯和2杯标记的杯子 尺寸，跳绳，跳绳游戏手册。干预计划 通过18个月的每月自我监测得到加强。教育 Only计划由三个关于健康饮食的普通会议组成， 身体健康，健康的生活方式选择。其主要成果是 人们感兴趣的是更高的钙摄入量和更高的负重水平 锻炼身体。另一个令人感兴趣的结果是宽带增加 用定量的方法评估骨钙素的超声衰减。 超音波。总而言之，针对这一群体的女孩是理想的 干预，因为他们正处于骨量快速增加的阶段。我们 假设干预将使他们获得最大的机会 达到潜在的峰值骨量，从而推动最终的 预防骨质疏松症的目标。

We have developed an innovate behavioral/education intervention designed to decrease modifiable risk factors for osteoporosis in preadolescent girls. The objective of the proposed study is to demonstrate the efficacy of this intervention in increasing levels of dietary calcium intake and weight-bearing exercise within an at-risk population in a stage of rapid accrual of bone mass--specifically, premenarchal Girl Scouts between the ages of 10 and 12. Cluster randomization will be used to randomize Girl Scout troops to either the intervention or a program of education only. Eighteen Girl Scout troops (144 girls) will be randomized into each arm (i.e., an estimated 8 girls participating per troop). The intervention consists of 3 interactive sessions utilizing various media (i.e., overhead transparencies, graphics, and three-dimensional demonstrations) to present instructional material. Topics include an explanation of osteoporosis and its modifiable and non-modifiable risk factors, prevention of osteoporosis via healthy food choice (i.e., high calcium, low fat foods), and prevention of osteoporosis via weight-bearing exercise (specifically, jumping rope.) Each girl is given a "3-day Star Chart" with colorful graphics for easy self-monitoring of her progress toward the goal of 1350 to 100 mg of calcium per day. Star stickers represent serving sizes of foods that contain either 150 mg (1 star) or 300 mg (2 stars) of calcium. The "Star Exercise Pyramid" similarly allows simple self monitoring of weight-bearing activity to be recorded with stars representing 5-, 10- or 15-minutes blocks of weight bearing exercise per week. Incentives are given to the girls to reinforce the content of the intervention sessions-- i.e., a food pyramid magnet, a mug with markings for 1 and 2 cup serving sizes, jump ropes, a booklet of jump rope games. The intervention program is reinforced via monthly self monitoring for 18 months. The education only program consists of three generic sessions on healthy eating, physical fitness, and healthy lifestyle choices. The primary outcomes of interest are higher calcium intake and higher levels of weight bearing exercise. A secondary outcome of interest is increased broadband ultrasound attenuation of the os calcis assessed using quantitative ultrasound. In summary, the group of girls targeted is ideal for this intervention since they are at a stage of rapid accrual of bone mass. We postulate that the intervention will maximize their opportunity for attaining potential peak bone mass, thus serving to further the ultimate goal of osteoporosis prevention.