Active clinical trials for "Osteoporosis"

Cardiovascular diseases (CVD) represent the most frequent cause of death among the elderly population. Hypertension, unfavorable lipid profile, obesity and physical inactivity are among the main risk factors for CVD. In contrast, mortality from CVD is inversely related to levels of physical activity, and is lower in individuals who exercise and have higher functional fitness levels. Thus, the Centers for Disease Control and Prevention, the American College of Sports Medicine, and the American Heart Association have recommended 20-30 min of moderate-to-vigorous aerobic training for the elderly, preferably every day or at least 3 days a week in the case of vigorous exercise.The same organizations also suggest the inclusion of resistance training in order to improve functional fitness. Therefore, the purpose of this study was to compare different exercise modalities in long-term changes of CVD risk factors and physical fitness among older adults.

This study will determine if daily oral intake of 200g of a marketed yogurt with fortified calcium content and a milk basic protein (MBP)80 mg benefits on bone cells activity in postmenopausal women. The efficacy of the product is measured by examining the variation of biochemical markers of bone turnover. MBP 80 is a particular protein contained in milk; it has been added to the yogurt provided for this study. The effects of MBP 80 on the quality of bone tissue have not yet been proven.

Optimal calcium retention is important for building bone mass within the genetic potential, a key to reducing risk of osteoporosis later in life. Calcium retention is high during the rapid growth period. The investigators know that urinary calcium is affected by sodium intake but the investigators do not know the effects of sodium intake during the growth spurt or the differences in calcium retention between blacks and whites. Our hypothesis was that a high dietary sodium increases the calcium intakes required for optimal calcium retention in both black and white adolescent girls. The investigators tested calcium retention while girls consumed a low and high sodium diet during three week periods. The subjects were housed in a Purdue fraternity house during the summer and they were supervised at all times by trained staff. During the summer of 1999, subjects consumed diets with 2 levels of dietary Na+ with a fixed diet low in calcium. On the next summer, they switched to a high calcium diet. Subjects collected fecal and urine daily for 20 days. Other measurements included daily body weight, blood pressure every other day, blood sample at the end of each session. Baseline measures included bone mass, self-assessment of pubertal development, a physical examination and diet history.

Osteoporosis is defined as a systemic skeletal disease characterised by low bone mass and microarchitectural deterioration of bone tissue, with a consequent increase in bone fragility and susceptibility to fracture. Osteoporosis is a serious public health problem that is responsible for approximately 3 million women with osteoporosis in France, with approximately 150,000 cases per year occurring in vertebral fractures, of which only one third would be diagnosed and 50,000 hip fractures (causing death in 20% of cases). The frequency of the disease increases with age, particularly among women: 10% among women aged 60 years and 20% among women aged 65 and 40% among women aged 75. At menopause, oestrogen deficiency causes alterations of the immune system, decreased bone formation, microarchitectural deterioration and a decrease in bone mass. Various factors may contribute to this decrease in bone density such as diet, lifestyle, or the genetic background. According to prospective studies, an overexpression of 135% of hip fractures is expected at European level in 50 years. Therefore, it is interesting to develop new prevention approaches aimed at maintaining the healthy aging population. Nutritional researches can consider setting up a real prevention. Studies suggest that specific milk protein fraction contain factors able to promote bone formation, inhibit bone resorption in vitro. In animal model, they showed that the specific fraction prevents bone loss in aged ovariectomised rats by reducing bone resorption. Furthermore, in human volunteers, a supplementation with the specific milk protein fraction maintains balanced bone remodelling and increase bone mineral density. For example, in healthy postmenopausal women, it has been reported that a mean rate of gain of lumbar BMD in the MPF group (1.21%) was significantly higher than in placebo group (-0.66%; p<0.05). The objective of this study is to assess the efficacy of daily consumption of the milk proteins fraction on bone mineral density improvement in healthy postmenopausal women.

Osteoporosis has been described as a paediatric disease with a geriatric outcome. This is because bone mass is acquired during youth and is progressively lost later in life, without symptom or pain, until a fracture occurs. The proper management of osteoporosis includes improving bone mineral content in the first two decades of life so that reserves are built up before bone loss ensues. The investigators aim to determine the effect of a 10-month school-based provision of high-calcium milk and weight-bearing exercise program on the bone mineral status among prepubertal girls. The investigators' study is novel since it seeks to determine the effect of these interventions in girls, whose overall risks are much higher for osteoporosis later in life, and in a developing country population whose calcium intakes are more likely to be depleted. The investigators hypothesize that provision of either high-calcium milk or weight-bearing exercises will improve bone mineral density among prepubertal girls but that the bone accrual will be greater among those with both interventions. In addition, the investigators hypothesize that the changes will be more marked among those whose calcium intakes are lower. This study will use a two-by-two factorial design of 1) high-calcium milk (1000 mg/day) vs. placebo (115 mg/day) and 2) weight-bearing exercises (a total of 90 to 150 minutes per week divided into 3 to 5 schooldays) vs. no-exercise (passive activities) in a randomized controlled trial, for a total of 4 intervention groups: calcium+exercise, placebo+exercise, calcium+no exercise, placebo+no exercise. The study will be conducted among 80 prepubertal girls (on Tanner stage 1), aged 7-9 years and enrolled in one primary school in one of the metropolitan cities in the Philippines with an institution or a hospital with a Lunar Prodigy Central dual-energy x-ray absorptiometry (DEXA) machine. Osteoporosis has no treatment. The problem will continue to become burdensome in the future since population aging per se will increase the risk and incidence of fractures. Understanding the relationship between calcium and exercise is important since the greatest benefit is in the paediatric age range. The study results could provide information on a workable intervention that promotes the multiple health benefits of both exercise and high-calcium milk to young children.

The purpose of this study is to examine whether adding the basic salt potassium bicarbonate to the diet will have a positive effect on how dietary protein affects your bone and muscle.

We will study the relative importance of high calcium intake and vitamin D supplementation for calcium homeostasis, as determined by serum parathyroid hormone (PTH) and biochemical bone markers. We also intend to examine the interaction of vitamin D and calcium intake on calcium homeostasis. We hypothesize that optimal calcium supplementation and optimal vitamin D supplementation will lead to lower serum levels of PTH and markers of bone resorption compared with the placebo. We also theorize that when taken together, optimal calcium supplementation and optimal vitamin D intake will result in lower serum levels of PTH and bone markers compared with calcium or vitamin D taken alone.

The study will elucidate the effectiveness of an educational program in the prevention of osteoporosis and fractures. A random sample of the female population in Southern Finland (Uusimaa region) within the age group of 60-70 years was drawn from the population registry. From 1996 through 2000, 2181 women from the population register were recruited and randomly assigned to the intervention and to the control group. The subjects in the intervention group have been on a multidisciplinary program and the subjects in the control group received osteoporosis prevention information through the media and health care system. An end point is any fracture during the ten-year follow-up.

Assesses physician compliance with paper-based and electronic guidelines, reminders, and alerts for outpatient settings. Target areas for the reminders and alerts are disease management, medication management, and interpretation of abnormal test results.

To evaluate the effectiveness of a multifaceted intervention (reminder and educational material) in improving the evaluation of osteoporosis follow-up care of post-menopausal women with wrist fractures by their primary care physicians. The intervention is directed at improving the gap in continuity of care between emergency/fracture clinics and family physicians, and reducing knowledge gaps.