Proctor, D. N., P. C. O’Brien, E. J. Atkinson, and K. S. Nair. Comparison of techniques to estimate total body skeletal muscle mass in people of different age groups. Am. J. Physiol. 277 (Endocrinol. Metab. 40): E489–E495, 1999.—An estimate of total body muscle mass with dual-energy X-ray absorptiometry (DXA; appendicular muscle mass divided by 0.75) was compared with 24-h urinary creatinine ex...

INTRODUCTION Osteoporosis can be a complication of ankylosing spondylitis (AS), but diagnosing spinal osteoporosis can be difficult since pathologic new bone formation interferes with the assessment of the bone mineral density (BMD). The aims of the current study were to investigate prevalence and risk factors for reduced BMD in a Swedish cohort of AS patients, and to examine how progressive an...

OBJECTIVES To analyze the requirements for osteoporosis (OP) treatment of primary care physicians (PCP), before and after knowing the result of a bone densitometry (DXA). MATERIAL AND METHODS We studied 50 years older women from two Spanish health areas (Canary Islands and Alicante). The FRAX risk factors were collected and we reviewed the requirements for OP treatment before DXA and in the s...

Dear Editor, Sarcopenia is the age-associated progressive loss of skeletal muscle mass and function, with higher risk of adverse outcomes [1, 2]. The cause of sarcopenia is still unclear, but the determinants are likely to be a combination of genetic and environmental factors [2–4]. Computed tomography andmagnetic resonance imaging are considered the gold standard to estimate muscle mass. Howev...

Dual-energy X-ray absorptiometry (DXA; DEXA) is the technique of choice to diagnose osteoporosis and to monitor the response to treatment. It is also useful for measuring body composition. In recent years, new applications have been developed, including vertebral morphometry through the study of the lateral spine, prosthesis integration in orthopedics, and lipodystrophy in HIV+ patients, althou...

BACKGROUND Besides magnetic resonance imaging, dual energy X-ray absorptiometry (DXA) seems the most reliable tool to evaluate body composition and is often considered as the gold standard in clinical practice. Bioelectrical impedance analysis (BIA) could provide a simpler, portative, and less expensive alternative. Because the body composition assessment by BIA is device-dependent, the aim of ...

BACKGROUND Undiagnosed, or diagnosed and untreated osteoporosis (OP) increases the likelihood that falls result in hip fractures, decreased quality of life (QOL), and significant medical expenditures among older adults. We tested whether a tailored dual energy x-ray absorptiometry (DXA) test result letter and an accompanying educational bone-health brochure affected patient satisfaction, QOL, o...

BACKGROUND Lipohypertrophy does not appear to be an adverse ART reaction while lipoatrophy is clearly associated with the use of stavudine (d4T) and zidovudine (AZT). In low and middle income countries d4T has only recently been phased out and AZT is still widely being used. Several case definitions have been developed to diagnose lipodystrophy, but none of them are generalizable to sub-Saharan...

background: osteoporosis is a chronic disease that contributes substantially to decrease physical activity and decline in the quality of life. osteoporosis can be diagnosed easily with the use of dual-energy x-ray absorptiometry (dxa) equipment. the aim of this study was to investigate the magnitude of bone loss on proximal femur and lumbar spine ls in pre- and post-menopausal women from isfaha...