Active clinical trials for "Osteoporosis"

Background: - Osteoporosis is a condition where the bone becomes more brittle and more likely to break as a person ages. The drugs that people take to treat this condition have prevented many common hip fractures. But these drugs may be associated with problems in the shape and structure of the hip bone after many years of use. These changes in the hip bone may lead to an unusual kind of hip fracture. These fractures are very rare, so it is hard to study them. Researchers want to learn more about these fractures. Objectives: - To compare hip x-rays of three groups: people who have been taking osteoporosis drugs for several years, those who have just started taking them, and those who have never taken these drugs. Eligibility: People at least 50 years of age who have been taking osteoporosis drugs for at least 5 years. People at least 50 years of age who have been taking these drugs for less than 1 year. People at least 50 years of age who have never taken these drugs. Design: All participants will have three total visits over 3 years. At the first visit, those taking part will have a medical history and physical exam. They will complete a questionnaire about medication use and bone health. They will also have an x-ray of the hips and pelvis, and have a bone density scan (the kind used to test for osteoporosis) of the hips. Those in the study will repeat these exams and medical history questions at followup visits. These visits will take place 18 months and 36 months after the first study visit. At any of these visits, participants who may have a hip fracture that does not show up on the x-rays will have an imaging study to examine the bone more closely. Participants who receive a hip replacement or suffer from a broken bone at any time should inform the study researchers as soon as possible.

To determine the prevalences of osteoporotic fracture in elderly Chinese population. To determine the prevalences of osteoporosis in elderly Chinese population using QCT BMD measurement. To investigate the difference in the prevalences of osteoporosis between cities and urban-rural area in China. To investigate the association of body composition with osteoporosis To investigate the prevalence of liver steatosis in China To investigate the application of QCT fat measurement

Postmenopausal Osteoporosis is characterized by a decrease in bone mass as well as a deterioration of the bone architecture resulting in an increased risk of fracture,which is directly related to the lack of estrogen and also associated with a variety of genetic and acquired factors. Previous studies have found that POP molecular regulation mechanism of kidney Yang deficiency syndrome may be associated with LTBP1 gene expression. This topic using RT-PCR and Western Blot detection POP of kidney Yang deficiency group and healthy group LTBP1 mRNA and proteion's expression level,validate LTBP1 relevance to POP the kidney Yang deficiency syndrome.To provide a scientific basis for clinical treatment.

Osteoporosis is a disease characterized by skeletal fragility due to decreased bone mass and deterioration of bone microarchitecture , leading to increased fracture risk for low trauma, such as spinal fractures or femoral neck . It is estimated that 3 million people are living in France , particularly women , with an incidence that increases with age . This disease is a major public health issue in terms of morbidity and mortality , costs and risk of recurrence (after a first fracture episode) , including risk factors are identified. However, although bone densitometry is a reliable diagnostic tool and preventive treatments are at our disposal, screening for osteoporosis is still insufficient . The objective of our study is to improve the detection of osteoporosis in Hospital Departmental Vendee , using a simple questionnaire seeking risk factors followed by bone densitometry or if risk factors are found. Based on the results , the patient will be sent in rheumatology consultation for implementation of treatment if necessary . Therefore included women hospitalized in medical services , gynecology, surgery and orthopedics Hospital Departmental Vendee , aged 50 to 80 years. Will not be included women who could answer a simple questionnaire and those previously treated for osteoporosis or have already received a bone density there is less than 3 years old .

The Swedish Mammography Cohort began in 1987-1990, when 66,651 women living in two counties in central Sweden completed a mailed questionnaire that included items about their diet, parity, age at first child's birth, history of breast cancer in family, weight, height, and education. Follow-up questionnaires have been sent out in 1997 and in 2008-09.

Study to demonstrate that the Bone UltraSonic Scanner (BUSS) can aid in detection of osteoporosis and predict prevalent osteoporotic fractures. Measurements derived from the BUSS parameters will be able to discriminate between postmenopausal women with osteoporotic fractures when compared to matched controls without history of osteoporotic fracture.

The purpose of this study is to determine the rate of osteoporosis among patients with advanced prostate cancer. to propose an algorithm for early detection of patients with advanced prostate cancer who are at risk of developing osteoporosis.

Specific subgroups of children who survive treatment for childhood malignancies have been shown to develop relative osteopenia following chemotherapy and are felt to be at risk for developing osteoporosis later in life due to their inability to reach peak bone mass during childhood. Based upon an earlier study in our department, the investigators reported conclusive evidence that approximately half of survivors of pediatric solid malignancies are at risk for these problems. However, the proportion of patients in our population that showed osteopenia/osteoporosis was lower than that in other similar cross-sectional studies in solid tumors such as osteosarcoma. The main difference between our report and the osteosarcoma study was duration of follow-up, with ours being shorter. Longer follow-up may prove that a larger proportion of our patients are affected. The purpose is to perform a longitudinal follow-up study of bone mineral density using dual-energy X-ray absorptiometry (DXA) in adult survivors of solid pediatric tumors that were previously studied as subjects in our original cross-sectional study. The primary hypothesis is that the proportion of pediatric solid cancer survivors with significantly lower bone mineral density (BMD) compared to established age group controls will be increased with the additional time that has elapsed since the original study despite the fact that the patients are young and would not normally be expected to have osteopenia/osteoporosis at this age.

Klinefelter syndrome (KS) is the most common sex-chromosome disorder with a prevalence of one in 660 men and is a frequent cause of hypogonadism and infertility. It is caused by the presence of extra X-chromosomes, the most common karyotype being 47,XXY. The phenotype is variable, but the most constant finding is small hyalinized testes, hypergonadotrophic hypogonadism, infertility, eunuchoid body proportion, increased height and learning disabilities. Klinefelter syndrome has been associated with increased prevalence of diabetes, osteoporosis and cardiovascular diseases but the pathogenesis is unknown. Accordingly the aim of the study was to investigate measures of body composition, insulin sensitivity, bone mineral density, echocardiography, as well as biochemical markers of endocrine, metabolic and bone function in KS and an age-matched control group.

Osteoporosis is a disease that leads to impaired skeletal strength and increased fracture risk. Among 200 million osteoporotic patients most are diagnosed only after several fractures. Furthermore, the progressively aging population will increase the prevalence of osteoporosis. It is estimated that over 75% of osteoporotic patients are not diagnosed and does not receive treatment for their condition. Bindex ultrasound device has been developed and validated in Caucasian female population. In this study, diagnostic thresholds for density index as determined with Bindex will be evaluated in two different ethnic populations.