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https://www.readbyqxmd.com/read/28634907/incidence-and-predictors-of-repeat-bone-mineral-densitometry-a-longitudinal-cohort-study
#1
Emily C White VanGompel, Peter Franks, John A Robbins, Joshua J Fenton
BACKGROUND: Existing guidelines for repeat screening and treatment monitoring intervals regarding the use of dual-energy x-ray absorptiometry (DXA) scans are conflicting or lacking. The Choosing Wisely campaign recommends against repeating DXA scans within 2 years of initial screening. It is unclear how frequently physicians order repeat scans and what clinical factors contribute to their use. OBJECTIVE: To estimate cumulative incidence and predictors of repeat DXA for screening or treatment monitoring in a regional health system...
June 20, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/28625602/frax-score-can-be-used-to-avoid-superfluous-dxa-scans-in-detecting-osteoporosis-in-celiac-disease-accuracy-of-the-frax-score-in-celiac-patients
#2
Raffaella Tortora, Nicola Imperatore, Pietro Capone, Nicolò Gerbino, Matilde Rea, Giovanna Affinito, Nicola Caporaso, Antonio Rispo
The Fracture Risk Assessment (FRAX) tool has been developed to estimate patients' 10-yr probability of fracture, thus establishing which patients should undergo dual-energy X-ray Absorptiometry (DXA) scan. This study aimed to evaluate if the FRAX tool can replace or optimize the use of DXA scan in celiac disease (CD). We prospectively enrolled all CD patients aged over 40 yr diagnosed at our third-level unit. At time of CD diagnosis, all patients underwent FRAX score calculation for risk of major osteoporotic and hip fractures and DXA scan (used as gold standard) to assess the accuracy of the FRAX score...
June 15, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28624339/structural-parameters-of-the-proximal-femur-by-3-dimensional-dual-energy-x-ray-absorptiometry-software-comparison-with-quantitative-computed-tomography
#3
Jordi Clotet, Yves Martelli, Silvana Di Gregorio, Luis Miguel Del Río Barquero, Ludovic Humbert
Structural parameters of the proximal femur evaluate the strength of the bone and its susceptibility to fracture. These parameters are computed from dual-energy X-ray absorptiometry (DXA) or from quantitative computed tomography (QCT). The 3-dimensional (3D)-DXA software solution provides 3D models of the proximal femur shape and bone density from anteroposterior DXA scans. In this paper, we present and evaluate a new approach to compute structural parameters using 3D-DXA software. A cohort of 60 study subjects (60...
June 14, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28614701/appendicular-and-whole-body-lean-mass-outcomes-are-associated-with-finite-element-analysis-derived-bone-strength-at-the-distal-radius-and-tibia-in-adults-aged-40years-and-older
#4
Jenna C Gibbs, Lora M Giangregorio, Andy K O Wong, Robert G Josse, Angela M Cheung
PURPOSE: The purpose of this cross-sectional study was to determine how appendicular lean mass index (ALMI), and whole body lean (LMI) and fat mass indices (FMI) associate with estimated bone strength outcomes at the distal radius and tibia in adults aged 40 years and older. METHODS: Dual energy X-ray absorptiometry (DXA) scans were performed to determine body composition, including whole body lean and fat mass, and appendicular lean mass. ALMI (appendicular lean mass/height(2)), LMI (lean tissue mass/height(2)) and FMI (fat mass/height(2)) were calculated...
June 11, 2017: Bone
https://www.readbyqxmd.com/read/28612306/bone-density-and-body-composition-in-newly-licenced-professional-jockeys
#5
K A Jackson, M T Sanchez-Santos, A L MacKinnon, A Turner, K Kuznik, S Ellis, C Box, J Hill, M K Javaid, C Cooper, N K Arden, J L Newton
The primary objective is the description of bone mineral density (BMD) and body composition in newly licensed jockeys. One in three male, flat jockeys has a very low bone mineral density. Further research is needed to assess the short-term risk of fractures and long-term health implications of these findings. INTRODUCTION: Describe bone mineral density (BMD) and body composition in entry-level male and female, flat and jump jockeys in Great Britain. METHODS: Data was collected on jockeys applying for a professional jockey license between 2013 and 2015...
June 13, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28603900/mitochondrial-point-mutation-m-3243a%C3%A2-%C3%A2-g-associates-with-lower-bone-mineral-density-thinner-cortices-and-reduced-bone-strength-a-case-control-study
#6
Jakob Høgild Langdahl, Anja Lisbeth Frederiksen, Stinus Jørn Hansen, Per Heden Andersen, Knud Bonnet Yderstraede, Morten Dunø, John Vissing, Morten Frost
Mitochondrial dysfunction is associated with several clinical manifestations including diabetes, neurological disorders, renal and hepatic diseases and myopathy. While mitochondrial dysfunction is associated with increased bone resorption and decreased bone formation in mouse models, effects of alterations in mitochondrial function on bone remodelling and mass have not been investigated in humans. We recruited 45 carriers (29 females, 16 males) with the m.3243A > G mutation and healthy controls matched for gender, age, height and menopausal status...
June 11, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28580404/the-associations-of-exposure-to-combined-hormonal-contraceptive-use-on-bone-mineral-content-and-areal-bone-mineral-density-accrual-from-adolescence-to-young-adulthood-a-longitudinal-study
#7
Stefan A Jackowski, Adam D G Baxter-Jones, Ashlee J McLardy, Roger A Pierson, Carol D Rodgers
BACKGROUND: The association of long term combined hormone based contraceptives (CHC) use on bone mineral content (BMC) and areal bone mineral density (aBMD) development remains controversial, as it appears that the relationship may be age-dependent. The purpose of this study was to investigate the long-term associations of CHC exposure on the accrual of bone parameters from adolescence into young-adulthood. METHODS: 110 women (67 exposed to CHC) were drawn from the Pediatric Bone Mineral Accrual Study (PBMAS)...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28574873/physical-activity-not-sedentary-time-predicts-dxa-measured-adiposity-age-5-19-years
#8
Kathleen F Janz, Piroska Boros, Elena M Letuchy, Soyang Kwon, Trudy L Burns, Steven M Levy
PURPOSE: To examine the associations among physical activity (PA), sedentary time (SED), and TV viewing (TV) with fat mass (FAT) and visceral adipose tissue mass (VAT) from childhood through adolescence (5-19 years). METHODS: Participants in the Iowa Bone Development Study (n = 230 males and 233 females) were examined at ages 5, 8, 11, 13, 15, 17 & 19 years. Accelerometers measured moderate- or vigorous-intensity PA (MVPA; min/day), light-intensity PA (LPA; min/day), and SED (h/day)...
June 2, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28566123/funen-anorexia-nervosa-study-a-follow-up-study-on-outcome-mortality-quality-of-life-and-body-composition
#9
Laura Al-Dakhiel Winkler
Eating disorders (EDs) comprise a wide range of symptoms, with severe psychological and physical implications for the patient. EDs include anorexia nervosa (AN), bulimia nervosa (BN) and until 2013 eating disorder not otherwise specified (EDNOS), if criteria for AN or BN were not met. Patients suffering from an ED have poor prognosis, with more than half of AN patients not obtaining complete remission. One-fifth develops a chronic disease. EDs have an increased risk of premature death and patients with EDs report poorer quality of life (QoL) compared to both the general population and other psychiatric/somatic diseases...
June 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28562531/widely-differing-screening-and-treatment-practice-for-osteoporosis-in-patients-with-inflammatory-bowel-diseases-in-the-swiss-ibd-cohort-study
#10
Solvey Schüle, Jean-Benoît Rossel, Diana Frey, Luc Biedermann, Michael Scharl, Jonas Zeitz, Natália Freitas-Queiroz, Thomas Kuntzen, Thomas Greuter, Stephan R Vavricka, Gerhard Rogler, Benjamin Misselwitz
Low bone mineral density (BMD) and osteoporosis remain frequent problems in patients with inflammatory bowel diseases (IBDs). Several guidelines with nonidentical recommendations exist and there is no general agreement regarding the optimal approach for osteoporosis screening in IBD patients. Clinical practice of osteoporosis screening and treatment remains insufficiently investigated.In the year 2014, a chart review of 877 patients included in the Swiss IBD Cohort study was performed to assess details of osteoporosis diagnostics and treatment...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28554549/utility-of-dxa-for-monitoring-technical-aspects-of-dxa-bmd-measurement-and-precision-testing
#11
John J Carey, Miriam F Delaney
Monitoring a patient's bone mineral density (BMD) is one of the main reasons for dual-energy X-ray absorptiometry (DXA) referral. It is widely recommended by clinical guidelines, and the accepted standard in practice for managing patients with osteoporosis and other disorders. Clinicians and DXA providers must be familiar with the scientific rationale and procedures involved in measurement science to obtain accurate and reproducible results. Their importance is critical to maximise the value of scan acquisition and interpretation...
May 26, 2017: Bone
https://www.readbyqxmd.com/read/28552661/30years-of-dxa-technology-innovations
#12
Claus-C Glüer
As the successor of Dual Photon Absorptiometry (DPA), Dual X-ray Absorptiometry (DXA) has seen 30years of continuous technological innovations. Implementation of measures for standardization and quality assurance made DXA a reliable and clinically useful approach. Its use in clinical multicenter drug studies in osteoporosis lead to general acceptance as the standard technique of bone densitometry. The limitations of DXA are well established. As a measure of areal bone mineral density (aBMD) it depends on bone size and is biased by overlaying soft tissue and calcified structures...
May 24, 2017: Bone
https://www.readbyqxmd.com/read/28543873/effect-of-surgery-vs-observation-skeletal-5-year-outcomes-in-a-randomized-trial-of-patients-with-primary-hpt-the-siph-study
#13
Karolina Lundstam, Ansgar Heck, Kristin Godang, Charlotte Mollerup, Marek Baranowski, Ylva Pernow, Turid Aas, Ola Hessman, Thord Rosén, Jörgen Nordenström, Svante Jansson, Mikael Hellström, Jens Bollerslev
Mild primary hyperparathyroidism (PHPT) is known to affect the skeleton, even though patients usually are asymptomatic. Treatment strategies have been widely discussed. However, long-term randomized studies comparing parathyroidectomy to observation are lacking. The objective was to study the effect of parathyroidectomy (PTX) compared to observation (OBS) on bone mineral density (BMD) in g/cm(2) and T-scores, and on biochemical markers of bone turnover (P1NP and CTX-1), in a prospective randomized controlled study of patients with mild PHPT after 5 years of follow-up...
May 25, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28502885/contra-lateral-bone-loss-at-the-distal-radius-in-postmenopausal-women-after-a-distal-radius-fracture-a-two-year-follow-up-hrpqct-study
#14
Joost J A de Jong, Jacobus J C Arts, Paul C Willems, Sandrine P G Bours, Judith P A Bons, Paul P C A Menheere, Bert van Rietbergen, Piet P Geusens, Joop P W van den Bergh
Opposite to the fracture side, bone mineral density (BMD) measured by DXA at the contra-lateral side does not change after a distal radius fracture. However, it is unknown if also bone micro-architecture and strength at the contralateral side are unaffected. Therefore, the aim of this study was to assess BMD, micro-architecture and bone mechanical properties at the contra-lateral side during two years follow-up after a distal radius fracture using high resolution peripheral quantitative computed tomography (HRpQCT)...
May 11, 2017: Bone
https://www.readbyqxmd.com/read/28487552/newborn-insula-gray-matter-volume-is-prospectively-associated-with-early-life-adiposity-gain
#15
J M Rasmussen, S Entringer, F Kruggel, D M Cooper, M Styner, J H Gilmore, S G Potkin, P D Wadhwa, C Buss
BACKGROUNDThe importance of energy homeostasis brain circuitry in the context of obesity is well established, however, the developmental ontogeny of this circuitry in humans is currently unknown. Here, we investigate the prospective association between newborn gray matter (GM) volume in the insula, a key brain region underlying energy homeostasis, and change in percent body fat accrual over the first six months of postnatal life, an outcome that represents among the most reliable infant predictors of childhood obesity risk...
May 10, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28486441/bone-mineral-density-in-patients-with-inherited-bone-marrow-failure-syndromes
#16
Roopa Kanakatti Shankar, Neelam Giri, Maya B Lodish, Ninet Sinaii, James C Reynolds, Sharon A Savage, Constantine A Stratakis, Blanche P Alter
BACKGROUNDPatients with inherited bone marrow failure syndromes (IBMFS) may have several risk factors for low bone mineral density (BMD). We aimed to evaluate the prevalence of low BMD in IBMFS and determine associated risk factors.METHODSPatients with IBMFS with at least one Dual Energy X-ray absorptiometry (DXA) scan were evaluated. Diagnosis of each IBMFS, Fanconi anemia (FA), dyskeratosis congenita, Diamond-Blackfan anemia, and Shwachman-Diamond syndrome, was confirmed by syndrome-specific tests. Data were gathered on age, height and clinical history...
May 9, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28486005/reference-values-for-assessment-of-unilateral-limb-lymphedema-with-dual-energy-x-ray-absorptiometry
#17
Caroline A Gjorup, Helle W Hendel, Tobias W Klausen, Bo Zerahn, Lisbet R Hölmich
INTRODUCTION: The clinical assessment of unilateral limb lymphedema is commonly based on measurements of interlimb volume differences. Reference values for interlimb percentage differences of the volume, fat mass, and lean mass measured with dual-energy X-ray absorptiometry (DXA) scan are, however, not established. The aim of the study was to establish and categorize these reference values in normal limbs. METHODS AND RESULTS: DXA scans of the normal arms of 167 and normal legs of 196 melanoma patients (aged 18-75 years, body mass index <40), respectively, were performed...
May 9, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28476576/non-bmd-dxa-measurements-of-the-hip
#18
Clinten P Edmondson, Elliott N Schwartz
Hip fracture is one of the most serious complications of osteoporosis. More than 50% of hip and other fractures occur in patients without densitometric osteoporosis. Therefore, areal bone mineral density (aBMD) may not be the best way to assess fracture risk. In order to improve assessment of fracture risk, many other approaches have been taken. At the present time, the Fracture Risk Algorithm (FRAX©) is one of the most notable ways to improve assessment of fracture risk. However, since early in the initiation of the dual energy x-ray absorptiometry (DXA) era, several non-BMD DXA approaches to the assessment of hip fracture risk have been proposed...
May 2, 2017: Bone
https://www.readbyqxmd.com/read/28474785/protein-timing-during-the-day-and-its-relevance-for-muscle-strength-and-lean-mass
#19
Samuel L Buckner, Jeremy P Loenneke, Paul D Loprinzi
Protein consumption and its association with changes in body composition, muscle function and different strategies to optimize the muscle protein synthetic response have received considerable attention. However, we are not aware of any epidemiological study examining the time-of-day consumption (afternoon versus evening) of protein on strength and lean mass. The purpose was to examine the associations between afternoon and evening protein consumption, at different protein thresholds (i.e. 15, 20, 25 and 30 g), in relation to leg lean mass and knee extensor strength in men...
May 5, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28473075/acr-appropriateness-criteria-%C3%A2-osteoporosis%C3%A2-and%C3%A2-bone-mineral-density
#20
Robert J Ward, Catherine C Roberts, Jenny T Bencardino, Erin Arnold, Steven J Baccei, R Carter Cassidy, Eric Y Chang, Michael G Fox, Bennett S Greenspan, Soterios Gyftopoulos, Mary G Hochman, Douglas N Mintz, Joel S Newman, Charles Reitman, Zehava S Rosenberg, Nehal A Shah, Kirstin M Small, Barbara N Weissman
Osteoporosis is a considerable public health risk, with 50% of women and 20% of men >50 years of age experiencing fracture, with mortality rates of 20% within the first year. Dual x-ray absorptiometry (DXA) is the primary diagnostic modality by which to screen women >65 years of age and men >70 years of age for osteoporosis. In postmenopausal women <65 years of age with additional risk factors for fracture, DXA is recommended. Some patients with bone mineral density above the threshold for treatment may qualify for treatment on the basis of vertebral body fractures detected through a vertebral fracture assessment scan, a lateral spine equivalent generated from a commercial DXA machine...
May 2017: Journal of the American College of Radiology: JACR
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