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https://www.readbyqxmd.com/read/28633874/proportional-bias-between-dual-energy-x-ray-absorptiometry-and-bioelectrical-impedance-analysis-varies-based-on-sex-in-active-adults-consuming-high-and-low-carbohydrate-diets
#1
Grant M Tinsley
Dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA) are common methods of body composition assessment, but the agreement between these methods varies. Bias between DXA and single-frequency BIA was evaluated at 6 different time points in 48 active male and female adults consuming standardized high- and low-carbohydrate diets. It was hypothesized that fixed and proportional biases exist between DXA and BIA but that the extent of bias does not differ based on sex. Substantial fixed bias was present for estimates obtained by DXA and BIA, and both men and women exhibited proportional bias for fat mass (FM) and fat-free mass (FFM)...
June 2017: Nutrition Research
https://www.readbyqxmd.com/read/28629885/-prevalence-of-osteoporosis-estimation-of-probability-of-fracture-and-bone-metabolism-study-in-patients-with-newly-diagnosed-prostate-cancer-in-the-health-area-of-lugo
#2
Jonatan Miguel-Carrera, Carlos García-Porrua, Francisco Javier de Toro Santos, Jose Antonio Picallo-Sánchez
OBJECTIVE: To study the prevalence of osteoporosis and fracture probability in patients diagnosed with prostate cancer. DESIGN: Observational descriptive transversal study. SITE: Study performed from Primary Care of Lugo in collaboration with Rheumatology and Urology Services of our referral hospital. PARTICIPANTS: Patients diagnosed with prostate cancer without bone metastatic disease from January to December 2012. MAIN MEASUREMENTS: Epidemiologic, clinical, laboratory and densitometric variables involved in osteoporosis were collected...
June 16, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28629717/sarcopenia-screened-by-the-sarc-f-questionnaire-and-physical-performances-of-elderly-women-a-cross-sectional-study
#3
Yves Rolland, Charlotte Dupuy, Gabor Abellan Van Kan, Matteo Cesari, Bruno Vellas, Marie Faruch, Cedric Dray, Philipe de Souto Barreto
OBJECTIVES: Screening for sarcopenia in daily practice can be challenging. Our objective was to explore whether the SARC-F questionnaire is a valid screening tool for sarcopenia (defined by the Foundation for the National Institutes of Health [FNIH] criteria). Moreover, we evaluated the physical performance of older women according to the SARC-F questionnaire. DESIGN: Cross-sectional study. PARTICIPANTS: Data from the Toulouse and Lyon EPIDémiologie de l'OStéoporose study (EPIDOS) on 3025 women living in the community (mean age: 80...
June 16, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28628047/improving-body-composition-may-reduce-the-immune-and-inflammatory-responses-of-firefighters-working-in-the-heat
#4
Anthony Walker, Heather E Wright Beatty, Sara Zanetti, Ben Rattray
OBJECTIVE: We hypothesized that different body composition and fitness of firefighters would affect immune and inflammatory activity after working in the heat. METHODS: Forty-two firefighters worked in the heat (100 ± 5 °C). Changes in leukocytes, platelets, tumor necrosis factor (TNF-α), and C-reactive protein (CRP) were analyzed based on body composition (DXA) and aerobic fitness (VO2max). RESULTS: Higher baseline leukocytes were observed for high body fat (P = 0...
April 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28626628/assessing-fracture-risk-in-early-stage-breast-cancer-patients-treated-with-aromatase-inhibitors-an-enhanced-screening-approach-incorporating-trabecular-bone-score
#5
Veronica Mariotti, David B Page, Oksana Davydov, Didier Hans, Clifford A Hudis, Sujata Patil, Siddharth Kunte, Monica Girotra, Azeez Farooki, Monica N Fornier
INTRODUCTION: Aromatase-inhibitors (AIs) are commonly used for treatment of patients with hormone-receptor positive breast carcinoma, and are known to induce bone density loss and increase the risk of fractures. The current standard-of-care screening tool for fracture risk is bone mineral density (BMD) by dual-energy X-ray absorptiometry (DXA). The fracture risk assessment tool (FRAX®) may be used in conjunction with BMD to identify additional osteopenic patients at risk of fracture who may benefit from a bone-modifying agent (BMA)...
June 2017: Journal of Bone Oncology
https://www.readbyqxmd.com/read/28626136/effect-of-hydroxyl-groups-on-solubilization-states-of-alkandiols-in-dtab-micelles-application-of-a-differential-conductivity-technique
#6
Hideo Kawamura, Yuuto Takeda, Takuro Tagawa, Hajime Katuura, Masaki Shiomi
The partition coefficients, Kx, of 1,2-alkanediols and α,ω-alkanediols between dodecyltrimethylammonium bromide (DTAB) micelles and water, and the change of the degree of counterion dissociation, dα/dXa(m), on DTAB micelles associated with solubilization of the alkanediols are determined by a differential conductivity technique. The standard Gibbs energy change of transfer per methylene group, ΔG(0)(CH2), is estimated from a dependence of logarithmic value of the Kx on the carbon number of alkyl chain in the alkanediols...
June 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28625918/body-composition-by-dxa
#7
John A Shepherd, Bennett K Ng, Markus J Sommer, Steven B Heymsfield
Body composition measurements from DXA have been available since DXA technology was developed 30years ago, but are historically underutilized. Recently, there have been rapid developments in body composition assessment including the analysis and publication of representative data for the US, official usage guidance from the International Society for Clinical Densitometry, and development of regional body composition measures with clinical utility. DXA body composition is much more than whole body percent fat...
June 16, 2017: Bone
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
#8
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
#9
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/28620779/the-cost-of-a-patient-activation-intervention-for-achieving-successful-outcomes-results-from-the-paadrn-randomized-controlled-trial
#10
F D Wolinsky, S F Hall, Y Lou, S W Edmonds, K G Saag, D W Roblin, N C Wright, M P Jones, P Cram, J R Curtis, S L Morgan, J A Schlechte, J H Williams, D J Zelman
In a large, pragmatic clinical trial, we calculated the costs of achieving four successful patient-centered outcomes using a tailored patient activation DXA result letter accompanied by a bone health brochure. The cost to achieve one successful outcome (e.g., a 0.5 standard deviation improvement in care satisfaction) ranged from $127.41 to $222.75. INTRODUCTION: Pragmatic randomized controlled trials (RCTs) should focus on patient-centered outcomes and report the costs for achieving those outcomes...
June 15, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28620575/osteoporosis-management-in-ankylosing-spondylitis
#11
Alicia M Hinze, Grant H Louie
Low bone mineral density (BMD) is increasingly recognized as a common comorbid condition in ankylosing spondylitis (AS). As low BMD increases fracture risk, it is important to identify and treat low BMD in patients with AS who have been shown to be at increased risk for fractures above the population normal. Since low BMD occurs early in disease, we screen during the first year of diagnosis with dual energy x-ray absorptiometry (DXA). If patients are found to have osteoporosis by T-score of less than -2.5 or if their Z-score on DXA is more than two standard deviations below the mean, we initiate therapy with bisphosphonates in males and in females who are not planning any future pregnancies...
December 2016: Current Treatment Options in Rheumatology
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
#12
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/28613988/cost-effectiveness-of-virtual-bone-strength-testing-in-osteoporosis-screening-programs-for-postmenopausal-women-in-the-united-states
#13
Christoph A Agten, Austin J Ramme, Stella Kang, Stephen Honig, Gregory Chang
Purpose To investigate whether assessment of bone strength with quantitative computed tomography (CT) in combination with dual-energy x-ray absorptiometry (DXA) is cost-effective as a screening tool for osteoporosis in postmenopausal women. Materials and Methods A state-transition microsimulation model of osteoporosis for postmenopausal women aged 55 years or older was developed with a lifetime horizon and U.S. societal perspective. All model inputs were derived from published literature. Three strategies were compared: no screening, DXA with T score-dependent rescreening intervals, and a combination of DXA and quantitative CT with different intervals (3, 5, and 10 years) at different screening initiation ages (55-65 years)...
June 14, 2017: Radiology
https://www.readbyqxmd.com/read/28612306/bone-density-and-body-composition-in-newly-licenced-professional-jockeys
#14
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/28611110/the-liftmor-m-lifting-intervention-for-training-muscle-and-osteoporosis-rehabilitation-for-men-trial-protocol-for-a-semirandomised-controlled-trial-of-supervised-targeted-exercise-to-reduce-risk-of-osteoporotic-fracture-in-older-men-with-low-bone-mass
#15
Amy T Harding, Benjamin K Weeks, Steven L Watson, Belinda R Beck
INTRODUCTION: The primary aim of the proposed study is to examine the efficacy of an 8-month supervised, high-intensity progressive resistance training and impact loading programme in comparison with a supervised machine-based isometric exercise training programme using the bioDensity system in older men with low bone mass. We will also determine the safety and acceptability of each exercise training mode. Intervention group responses will be compared with those of a self-selected, non-randomised control sample of sex-matched and age-matched men who will follow their usual lifestyle activities for 8 months...
June 12, 2017: BMJ Open
https://www.readbyqxmd.com/read/28606569/dual-energy-x-ray-absorptiometry-metabolic-maps-to-resting-energy-expenditure-estimation-and-body-size-dependence-in-brazilian-young-men
#16
Juliano Henrique Borges, Raquel David Langer, Vagner Xavier Cirolini, Mauro Alexandre Páscoa, Gil Guerra-Júnior, Ezequiel Moreira Gonçalves
OBJECTIVES: The model most suitable for estimating resting energy expenditure (REE) using dual-energy X-ray absorptiometry (DXA) metabolic maps is not known; moreover, the applicability in individuals with different body sizes also is uncertain. The aim of this study was to test the accuracy of REE estimation from models of DXA metabolic maps with four, five, and six tissue-organ components in young men, stratified by body size. METHODS: We studied 52 young men between the ages of 18 and 29 y...
July 2017: Nutrition
https://www.readbyqxmd.com/read/28605535/muscle-wasting-in-male-tnf-%C3%AE-blocker-na%C3%A3-ve-ankylosing-spondylitis-patients-a-comparison-of-gender-differences-in-body-composition
#17
Sebastián Ibáñez Vodnizza, Ingrid M Visman, Christiaan van Denderen, Willem F Lems, Francisca Jaime, Michael T Nurmohamed, Irene E van der Horst-Bruinsma
Objective.: To assess gender differences in body composition (BC) in a cohort of AS patients naïve to TNF-α blockers. Methods.: Patients included fulfilled the Modified New York criteria for AS. Demographic information and disease activity measures (ASDAS and BASDAI) were reported. BC was measured by whole body DXA. Body fat percentage (BF%), fat mass index (FMI), fat free mass index (FFMI) and android/gynoid fat ratio were reported and compared between men and women and with the reference population (percentiles)...
June 12, 2017: Rheumatology
https://www.readbyqxmd.com/read/28604756/anthropometry-dxa-and-leptin-reflect-subcutaneous-but-not-visceral-abdominal-adipose-tissue-by-mri-in-197-healthy-adolescents
#18
Jeanette Tinggaard, Casper P Hagen, Anders N Christensen, Annette Mouritsen, Mikkel G Mieritz, Christine Wohlfahrt-Veje, Jørn W Helge, Thomas N Beck, Eva Fallentin, Rasmus Larsen, Rikke B Jensen, Anders Juul, Katharina M Main
BACKGROUND: Abdominal fat distribution is associated with development of cardio-metabolic disease, independently of BMI. We assessed anthropometry, serum adipokines and DXA as markers of abdominal subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) by MRIMETHODS:We performed a cross-sectional study including 197 healthy adolescents (114 boys) aged 10-15 years nested within a longitudinal population-based cohort. Clinical examination, blood sampling, DXA and abdominal MRI was performed...
June 12, 2017: Pediatric Research
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
#19
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/28602783/patient-reported-reasons-for-nonadherence-to-recommended-osteoporosis-pharmacotherapy
#20
Sylvie F Hall, Stephanie W Edmonds, Yiyue Lou, Peter Cram, Douglas W Roblin, Kenneth G Saag, Nicole C Wright, Michael P Jones, Fredric D Wolinsky
OBJECTIVES: As many as one-half of patients recommended for osteoporosis pharmacotherapy do not take their medications. To identify intervention targets, we examined patient characteristics associated with nonadherence to recommended pharmacotherapy and their reasons for nonadherence. METHODS: Data come from the Patient Activation after DXA Result Notification (PAADRN) study, a randomized controlled trial of 7749 patients aged 50 years or older presenting for dual-energy X-ray absorptiometry (DXA) at 3 health centers in the United States...
June 8, 2017: Journal of the American Pharmacists Association: JAPhA
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