Risk Factor For Bone Fractures Research Articles

Association of serum sodium levels with fractures and mortality in patients undergoing maintenance hemodialysis.

Hyponatremia is implicated in pathological bone resorption and has been identified as a risk factor for bone fracture in the general population. However, there are limited data on the association between serum sodium levels and fracture risk in patients undergoing hemodialysis (HD). We analyzed a historical cohort of 2220 maintenance HD patients to examine the association between serum sodium levels and the risk of fracture and mortality. We also examined the association between serum sodium levels and osteoporosis, based on metacarpal bone mineral density, in a subcohort of 455 patients with available data. In addition, we examined the association between serum sodium levels and bone turnover markers in a separate cross-sectional cohort of 654 maintenance HD patients. During a median follow-up of 5.4years, 712 patients died, 113 experienced clinical fractures, and 64 experienced asymptomatic vertebral fractures. Lower serum sodium levels were associated with an increased risk of mortality (HR 1.06 per 1mEq/L decrease; 95% CI 1.03-1.09) but not with the risk of clinical fracture (HR 1.04 per 1mEq/L decrease; 95% CI 0.97-1.11). A similar lack of association was observed for asymptomatic vertebral fracture and any fracture. Serum sodium levels were also not associated with osteoporosis in a subcohort with available data (n = 455) or with bone alkaline phosphatase or tartrate-resistant acid phosphatase-5b in a separate cross-sectional cohort. Serum sodium levels were associated with mortality but not with fracture risk, osteoporosis, or bone turnover markers in maintenance HD patients.

Fat Body Mass and Vertebral Fracture Progression in Women With Breast Cancer

Women with early breast cancer (EBC) exposed to aromatase inhibitors (AIs) may experience fragility fractures despite treatment with bone-active drugs. Risk factors for fractures in patients receiving AIs and denosumab have not been explored to date. To evaluate whether an association exists between dual x-ray absorptiometry (DXA)-measured fat body mass (FBM) and vertebral fracture (VF) progression in postmenopausal women with EBC undergoing adjuvant therapy with AIs in combination with denosumab and to examine whether VF was associated with common risk factors for bone fracture and parameters of body composition other than FBM. For this prospective, single-center, cohort study, 237 patients with EBC who were undergoing adjuvant treatment with AIs and denosumab (60 mg every 6 months) were enrolled at the Breast Unit of the ASST Spedali Civili of Brescia from September 2014 to June 2018. Data analysis was conducted in June 2022. Body composition parameters, bone mineral density, and morphometric VFs were assessed by DXA at study entry and after 18 months of therapy. VF progression, defined as either new or worsening of preexisting VFs, between the 2 time points. Of the 237 patients enrolled (median [range] age, 61 [28-84] years), 17 (4.4%) reported VF progression. Univariable analysis found an association between VF progression and a history of clinical fractures (odds ratio [OR], 3.22; 95% CI, 1.19-8.74; P = .02), Fracture Risk Assessment Tool (FRAX) score for major fractures (OR, 4.42; 95% CI, 1.23-13.79; P = .04), percentage of FBM (OR, 6.04; 95% CI, 1.69-21.63; P = .006), and android fat (OR, 9.58; 95% CI, 1.17-78.21; P = .04) and an inverse association with appendicular lean mass index-FBM ratio (OR, 0.25, 95% CI, 0.08-0.82; P = .02). Multivariable analysis revealed percentage of FBM (OR, 5.41; 95% CI, 1.49-19.59; P = .01) and FRAX score (OR, 3.95; 95% CI, 1.09-14.39; P = .04) as independent variables associated with VF progression. The findings of this study suggest that baseline FBM is an independent factor for VF progression in patients with EBC treated with adjuvant AIs and denosumab. This observation is new and indicates that diet and exercise may synergize with denosumab in the management of bone health in this patient setting.

Analysis of Bone Mineral Density, Bone Tissue Quality Index (TBS) and Salt Transport in Patients with Nephrolithiasis

The objective: to determine the bone mineral density (BMD), bone tissue quality index (TBS) and to analyze the salt transport in patients with and without urolithiasis. Materials and methods. For qualitatively assess of crystalluria, a study of salt transport was conducted. Evaluation of the structural and functional state of bone tissue was performed on the basis of the Ukrainian Osteoporosis Center of the State University “Institute of Gerontology named after D. F. Chebotareva of National Academy of Sciences of Ukraine” by X-ray absorptiometry of the “Hologic Discovery” apparatus. 80 persons (15 men and 65 women) were included in the study, the average age of the patients was 58 years. Study participants were divided into two groups depending on the presence of urolithiasis. I group (n=32) included patients without urolithiasis with somatic diseases in the remission stage, who had no signs of exclusion criteria. Osteoporosis was diagnosed in 9 (28.1%) women of this group. Patients with urolithiasis were included in the II group (n=48). Osteoporosis was diagnosed in 18 (37.5%) women and 3 (6.25%) men in this group. Results. It was established that 21 (26.2%) patients had BMD within the normal range, 29 (36.3%) patients had BMD abnormalities within the limits of osteopenia, and 30 (37.6%) patients had osteoporosis, namely: 27 (33.8%) women and 3 (3.8%) men. Analysis of BMD status demonstrated that normal densitometric values were comparable in both groups (31.2% without urolithiasis and 22.9% patients with nephrolithiasis; p>0.05). The incidence of osteopenia in patients with urolithiasis (33.3%) and without urolithiasis (40.7%) and the number of cases of detected osteoporosis also did not significantly differ (43.8% and 28.1%, respectively; p>0.05). During X-ray absorptiometry it was found that the TBS bone quality index was significantly lower in patients with urolithiasis (p<0.05). A comparative analysis of salt transport demonstrated that blood uric acid levels in patients with urolithiasis were significantly higher (p=0.02) than those in patients without nephrolithiasis. Conclusions. The results of the study indicate the need for ultrasound examination of the kidneys and salt transport when checking BMD in patients at risk of osteoporosis for early diagnosis of nephrolithiasis and correction of crystalluria. Since a decrease in TBS even with a normal BMD is also an increased risk factor for bone fractures, its timely identification and correction are extremely important in patients with nephrolithiasis. The obtained data indicate the need to conduct a correlational analysis of risk factors in the group of patients with nephrolithiasis, in particular, the influence of the state of the bone system, the TBS indicator and crystalluria.

Serum phosphate is associated with increased risk of bone fragility fractures in hemodialysis patients.

Bone fragility fractures are associated with high morbidity and mortality. This study analysed the association between the current biochemical parameters of CKD-MBD and bone fragility fractures in the COSMOS project. COSMOS is a 3-year, multicentre, open cohort, prospective, observational study carried out in 6797 hemodialysis patients (227 centres from 20 European countries). The association of bone fragility fractures (outcome) with serum calcium, phosphate and PTH (exposure), was assessed using Standard Cox proportional hazards regression and Cox proportional hazards regression for recurrent events. Additional analyses were performed considering all-cause mortality as a competitive event for bone fragility fracture occurrence. Multivariable models were used in all strategies, with the fully adjusted model including a total of 24 variables. During a median follow-up of 24 months 252 (4%) patients experienced at least one bone fragility fracture (incident bone fragility fracture rate 28.5 per 1000 patient-years). In the fractured and non-fractured patients, the percentage of men was 43.7% and 61.4%, mean age 68.1 and 63.8 years and a haemodialysis vintage of 55.9 and 38.3 months respectively. Baseline serum phosphate>6.1mg/dL (reference value 4.3-6.1mg/dL) was significantly associated with a higher bone fragility fracture risk in both regression models (HR: 1.53[95%CI: 1.10-2.13] and HR: 1.44[95%CI: 1.02-2.05]. The significant association persisted after competitive risk analysis (subHR: 1.42[95%CI: 1.02-1.98]) but the finding was not confirmed when serum phosphate was considered as a continuous variable. Baseline serum calcium showed no association with bone fragility fracture risk in any regression model. Baseline serum PTH>800 pg/mL was significantly associated with a higher bone fragility fracture risk in both regression models, but the association disappeared after a competitive risk analysis. Hyperphosphatemia was independently and consistently associated with an increased bone fracture risk, suggesting serum phosphate could be a novel risk factor for bone fractures in hemodialysis patients.

Bone Health in People Living with HIV/AIDS: An Update of Where We Are and Potential Future Strategies

The developments in Human Immunodeficiency Virus (HIV) treatment and in the care of people living with HIV (PLWHIV) and Acquired Immunodeficiency Syndrome (AIDS) over the last three decades has led to a significant increase in life expectancy, on par with HIV-negative individuals. Aside from the fact that bone fractures tend to occur 10 years earlier than in HIV-negative individuals, HIV is, per se, an independent risk factor for bone fractures. A few available antiretroviral therapies (ARVs) are also linked with osteoporosis, particularly those involving tenofovir disoproxil fumarate (TDF). HIV and hepatitis C (HCV) coinfection is associated with a greater risk of osteoporosis and fracture than HIV monoinfection. Both the Fracture Risk Assessment Tool (FRAX) and measurement of bone mineral density (BMD) via a DEXA scan are routinely used in the assessment of fracture risk in individuals living with HIV, as bone loss is thought to start between the ages of 40 and 50 years old. The main treatment for established osteoporosis involves bisphosphonates. Supplementation with calcium and vitamin D is part of clinical practice of most HIV centers globally. Further research is needed to assess (i) the cut-off age for assessment of osteoporosis, (ii) the utility of anti-osteoporotic agents in PLWHIV and (iii) how concomitant viral infections and COVID-19 in PLWHIV can increase risk of osteoporosis.

P341 Fracture risk in middle-age and older patients with inflammatory bowel disease: A Korean nationwide population-based cohort study

Abstract Background Fracture risks and associated factors in middle-age and older Asian populations with inflammatory bowel disease are poorly understood. We investigated fracture risk and the effects of comorbidities and lifestyle habits on the risk of developing fractures in middle-age and older Korean patients with inflammatory bowel disease. Methods We conducted a nationwide population-based cohort study using data from the National Health Insurance Corporation Database. We included patients aged over 40 years with inflammatory bowel disease who received the National Screening Program. We compared patients with age- and sex-matched controls. The incidence of fractures, including vertebral, hip, and other sites was determined using claims data. Results The risk of total fractures and vertebral fractures was significantly higher in the inflammatory bowel disease group [adjusted hazard ratio=1.31, 95% confidence interval=1.16–1.48; adjusted hazard ratio=1.59, 95% confidence interval=1.33–1.92, respectively]. Obesity, diabetes, hypertension, and lack of exercise were associated with an increased risk of fracture in patients with ulcerative colitis. In contrast, risk tended to increase regardless of comorbidities and lifestyle habits in patients with Crohn’s disease. Conclusion The risk of bone fracture, especially vertebral fracture, is high in middle-age and older Korean patients with inflammatory bowel disease. Obesity, diabetes, hypertension, and lack of exercise are risk factors for bone fracture in patients with ulcerative colitis. These findings may be helpful for clinicians to educate patients with inflammatory bowel disease on bone health and raise awareness of bone fractures in patients with ulcerative colitis who have specific risk factors.

Smoking Impairs Hematoma Formation and Dysregulates Angiogenesis as the First Steps of Fracture Healing.

Bone fracture healing is an overly complex process in which inflammation, osteogenesis, and angiogenesis are tightly coupled, and delayed fracture repair is a very common health risk. One of the major causes of delayed healing is the formation of insufficient vasculature. Precise regulation of blood vessels in bone and their interplay with especially osteogenic processes has become an emerging topic within the last years; nevertheless, regulation of angiogenesis in (early) diseased fracture repair is still widely unknown. Here, we aim to develop an in vitro model for the analysis of early fracture healing which also enables the analysis of angiogenesis as a main influencing factor. As smoking is one of the main risk factors for bone fractures and developing a delay in healing, we model smoking and non-smoking conditions in vitro to analyze diverging reactions. Human in vitro fracture hematomas mimicking smokers’ and non-smokers’ hematomas were produced and analyzed regarding cell viability, inflammation, osteogenic and chondrogenic differentiation, and angiogenic potential. We could show that smokers’ blood hematomas were viable and comparable to non-smokers. Smokers’ hematomas showed an increase in inflammation and a decrease in osteogenic and chondrogenic differentiation potential. When analyzing angiogenesis, we could show that the smokers’ hematomas secrete factors that drastically reduced HUVEC proliferation and tube formation. With an angiogenesis array and gene expression analysis, we could identify the main influencing factors: Anpgt1/2, Tie2, and VEGFR2/3. In conclusion, our model is suitable to mimic smoking conditions in vitro showing that smoking negatively impacts early vascularization of newly formed tissue.

Lower Geriatric Nutritional Risk Index (GNRI) Is Associated with Higher Risk of Fractures in Patients Undergoing Hemodialysis.

Background: Although malnutrition and bone fracture are both major complications in patients undergoing hemodialysis, their association has not been clarified. The aim of our study was to clarify the association between the geriatric nutritional risk index (GNRI), an indicator of nutritional status, and the incidence of bone fractures in patients undergoing hemodialysis. Methods: We included 1342 registered patients undergoing hemodialysis and performed a post hoc analysis. We divided patients into the high GNRI group (≥92), considered to have a low risk of malnutrition, and the low GNRI group (<92), considered to have a high risk of malnutrition. Fracture-free survival in the low and high GNRI groups was evaluated by the Kaplan–Meier method. Cox proportional hazards models were used to identify the risk factors for fractures requiring hospitalization. All results were stratified by sex. Results: New bone fractures developed in 108 (8.0%) patients in 5 years of follow-up. Bone fractures occurred more frequently in the low GNRI group compared with the high GNRI group (HR: 3.51, 95% CI: 1.91–6.42, p < 0.01 in males; HR: 2.47, 95% CI: 1.52–4.03, p < 0.01 in females). A low GNRI was significantly associated with an increased incidence of bone fractures, even after adjustment for covariates. However, the serum levels of calcium, phosphate, parathyroid hormone, and alkaline phosphatase were not associated with the incidence of bone fractures. Conclusions: A low GNRI is an independent risk factor for bone fractures in patients undergoing hemodialysis. Early intervention for the low GNRI group may be important in preventing the occurrence of fractures.

Vitamin B12 status is a risk factor for bone fractures among vegans

Several studies consistently showed vegans having a higher risk of bone fractures compared to individuals from other diet groups. While researchers have focused on several factors as possible explanation of these findings, both dietary (e.g. calcium) and non-dietary (e.g. weight/BMI status), the widespread inadequate vitamin B12 (B12) status among vegans as a risk factor for bone fractures has not received adequate scrutiny. The detrimental impact of inadequate B12 status on bone tissue is both direct, via the impairment of the insulin-like growth hormone 1 and taurine synthesis, and indirect, induced through its hyperhomocysteinemic effect, via at least the following mechanisms: 1) reducing bone mineral content and density by accumulating in the extracellular matrix, 2) reducing osteoblasts and increasing osteoclasts function, 3) reducing blood flow to bone tissue, 4) inducing apoptosis via the reactive oxygen-species-mediated mitochondrial pathway, and 5) obstructing the formation of collagen cross-links, impeding lyslyl oxidase, and hampering insolubility of fibrils. Considering the widespread B12 deficiency prevalence among vegans, its role in bone fracture risk should not be overlooked.

FC 079HIGH SERUM PHOSPHATE, A NOVEL POTENTIAL RISK FACTOR FOR BONE FRAGILITY FRACTURES IN THE COSMOS STUDY

Abstract Background and Aims Bone fragility fractures (bone fractures) are extremely frequent in haemodialysis (HD) patients. Serum phosphate (P) has been suggested as a risk factor for bone fracture, nonetheless, evidence is poor. The aim of this study was to assess the association between incidence of bone fractures and serum phosphate (P), calcium (Ca) and parathyroid hormone (PTH) in patients from the COSMOS study. Method COSMOS is an observational, prospective, open cohort study with 3 years of follow-up including 6797 haemodialysis patients from 227 centres randomly selected from 20 European countries. At baseline, demographics, comorbidities, treatments, serum biochemical parameters of the previous six months and bone fractures of the previous 12 months were collected. Every 6 months, all these variables, outcomes, and incident bone fractures, were collected. Patients who had at least one bone fracture during follow-up were compared with those who had not. Multivariate binary logistic regression and Poisson regression were used to assess the association between incidence of bone fractures and serum P, Ca and PTH. Time to fracture (and possible re-fracture) was also evaluated using Cox regression and Cox regression for recurrent events. All the results were adjusted by 23 variables including Ca, P, PTH, albumin and haemoglobin (full adjusted model). Results Analysis included 6274 patients who had follow-up data and non-missing information regarding bone fractures at baseline and during follow-up; 252 patients (4.0%), suffered at least one incident bone fracture. The fractured patients were older (68.1±12.9 vs. 63.8±14.5 years, p&amp;lt;0.001), with a higher percentage of women (56.3% vs. 38.6%, p&amp;lt;0.001) and history of cardiovascular disease (79.4% vs. 71.7%, p=0.010), longer haemodialysis vintage (55.9±64.0 vs. 38.3±48.8 months, p&amp;lt;0.001), and higher serum calcium (9.2±0.8 vs. 9.1±0.7 mg/dL, p=0.025) and lower serum albumin (3.7±0.5 vs. 3.8±0.5 g/dL, p=0.004) levels. Multivariate binary logistic regression showed that “well known risk factors for bone fracture”, such as a previous bone fracture (OR: 7.78[95%CI:4.83-12.55], p&amp;lt;0.001), older age (OR: 1.03[95%CI:1.01-1.04], p&amp;lt;0.001, per 1 year), sex female (OR: 1.71[95%CI:1.28-2.30], p&amp;lt;0.001), haemodialysis vintage (OR: 1.00[95%CI: 1.00-1.01], p=0.002, per 1 month), and serum PTH &amp;gt; 800 pg/mL (OR: 1.60[95%CI: 1.01-2.55], p=0.047), were associated with a higher incidence of follow-up bone fractures. In addition to the “well known bone risk factors for fracture”, serum P &amp;gt; 6.1 mg/dL (OR: 1.50[95% CI: 1.07-2.11], p=0.02) and serum Ca &amp;gt; 9.7 mg/dL (OR: 1.42[95%CI: 1.01-2.03], p=0.043), were also associated with a higher incidence of bone fractures in the full-adjusted model. These findings were partly consistent with Poisson regression for serum P &amp;gt;6.1 mg/dL (IRR: 1.46[95% CI: 1.00-2.13], p=0.0085) and serum Ca &amp;gt; 9.7 mg/dL (IRR: 1.49[95%CI: 1.06-2.08], p=0.0047), but not for PTH. In addition, Cox regression analysis showed association between bone fractures and serum P &amp;gt;6.1 mg/dl (HR: 1.61 [95%CI: 1.16-2.24], p=0.0049) and 1.60 [95%CI: 1.14-2.24] (p=0.0066) for simple and recurrent events respectively, but no association was found with serum Ca and PTH in the 2 full-adjusted models for the Cox regression analyses. Conclusion In COSMOS, a large haemodialysis patient’s cohort with 3 years follow up, serum P was the only biochemical parameter that remained as a significant risk factor for bone fractures after 4 statistic approaches. Thus, for the first time, in a large scale well controlled study, high serum P has been identified as a new independent potential risk factor for incident bone fractures in haemodialysis patients.

Abstract #1003622: Hyperhomocysteinemia and Osteoporisis: Should We Check Homocysteine Levels More Often?

Osteoporosis is a ubiquitous disease with a prevalence of over 200 million people worldwide and is a major risk factor for bone fractures, decreased quality of life, and increased mortality. Primary causes account for the majority of cases and include postmenopausal estrogen loss and age-related bone loss. Secondary causes account for 30% of cases in postmenopausal women and 50% in men, with chronic glucocorticoid use being the most common secondary cause. Hyperhomocysteinemia (HHcy) has been associated with lower bone mineral density and rarely may be the cause of osteoporosis as a diagnosis of exclusion.

Assessment of risk factors for bone fractures in patients with type 2 diabetes mellitus: A study in Saudi Arabia

Background and aimsThis study aimed to estimate the prevalence of bone fractures and analyze their associated risk factors in people with and without type 2 diabetes (T2D) in Saudi Arabia. MethodsThis study was conducted among 1188 people (581 type 2 diabetes) in Prince Sultan Military Medical City, Riyadh, Saudi Arabia. In addition to the demographic variables, glycated hemoglobin (HbA1c), creatinine, estimated glomerular filtration rate (eGFR), use of teriparatide, presence of rheumatoid arthritis, presence of chronic obstructive pulmonary disease (COPD), Bone mineral density (BMD), Trabecular Bone Score (TBS) and Fracture Risk using the Fracture Risk Assessment Tool (FRAX) were also collected. ResultsThere were 1188 people (mean age 66.5 ± 8.7yrs) included in this study, of which 1068 (89.9%) were female, and 120 (10.1%) were male. A total of 112 (9.4%) individuals had a fracture history. Female, use of teriparatide, TBS (partially degraded and degraded), FRAX with TBS (MOF), and FRAX with TBS (Hip fx) were identified as independent risk factors for fracture in the whole study population. Teriparatide use and FRAX with TBS (MOF) were observed as independent risk factors for fracture in the non-diabetic population, whereas age, creatinine, eGFR, teriparatide, osteopenia, osteoporosis, TBS (partially degraded, degraded), FRAX with TBS (MOF), FRAX with TBS (Hip fx) were determined as independent risk factors for fracture among patients with diabetes. ConclusionPatients with T2D were observed to have a higher risk for fractures. The findings of the study highlight the requirement for fracture prevention strategies in patients with diabetes.

Strong Genetic Effects on Bone Mineral Density in Multiple Locations with Two Different Techniques: Results from a Cross-Sectional Twin Study.

Background and Objectives: Previous studies have demonstrated that risk of hip fracture is at least partly heritable. The aim of this study was to determine the magnitude of the genetic component of bone mineral density (BMD), using both X-ray and ultrasound assessment at multiple sites. Materials and Methods: 216 adult, healthy Hungarian twins (124 monozygotic, MZ, 92 dizygotic, DZ; mean age 54.2 ± 14.3 years), recruited from the Hungarian Twin Registry with no history of oncologic disease underwent cross-sectional BMD studies. We measured BMD, T- and Z-scores with dual energy X-ray absorptiometry (DEXA) at multiple sites (lumbar spine, femoral neck, total hip and radius). Quantitative bone ultrasound (QUS) was also performed, resulting in a calculated value of estimated bone mineral density (eBMD) in the heel bone. Heritability was calculated using the univariate ACE model. Results: Bone density had a strong genetic component at all sites with estimates of heritability ranging from 0.613 to 0.838 in the total sample. Lumbar BMD and calcaneus eBMD had major genetic components with estimates of 0.828 and 0.838 respectively, and least heritable (0.653) at the total hip. BMD of the radius had also a strong genetic component with an estimate of 0.806. No common environmental effect was found. The remaining variance was influenced by unique environment (0.162 to 0.387). In females only, slightly higher additive genetic estimates were found, especially in the case of the femoral neck and total hip. Conclusion: Bone mineral density is strongly heritable, especially in females at all locations using both DEXA and QUS, which may explain the importance of family history as a risk factor for bone fractures. Unshared environmental effects account for the rest of the variance with slight differences in magnitude across various bone regions, supporting the role of lifestyle in preventing osteoporotic fractures with various efficacy in different bone regions.

Nomogram to Predict Cadmium-Induced Osteoporosis and Fracture in a Chinese Female Population.

Cadmium exposure may increase the risk of osteoporosis. However, there is no quick method to get bone mineral density (BMD) unless dual-energy X-ray absorptiometry (DXA) examinations were performed. In the present study, we aimed to identify associated factors to osteoporosis and fracture in a Chinese female population with cadmium exposure and develop nomograms to predict the risk. A total of 488 women was included in this study. Cadmium in blood (BCd) and urine (UCd) were determined as exposure biomarkers. BMD was determined using single-photon absorptiometry. Urinary N-acetyl-β-d-glucosaminidase (UNAG) and urinary albumin (UALB) were determined as renal function biomarkers. Osteoporosis was defined if T-score < - 2.5. Multiple logistic regression showed that age, BCd, and menopausal status were independent risk factors for osteoporosis. The odds (OR) value was 1.19 (95% confidence interval (CI): 1.14-1.25) for age, 1.05 (95% CI: 1.004-1.10) for BCd, and 4.75 (95% CI: 1.65-13.69) for menopausal status after adjusting with cofounders. Age and UCd were the independent risk factors for bone fracture. Nomograms were developed based on the associated factors. Age was the main determinant for osteoporosis or fracture. Receiver operating curve showed acceptable performance in predicting osteoporosis (area under the curve (AUC) = 0.93, 95CI: 0.90-0.96) and fracture (AUC = 0.67, 95% CI: 0.58-0.75). Linear discriminant analysis (LDA) further showed that 88.9% of osteoporosis and 68.4% of fractures were correctly classified. Our study develops nomograms that may be used to predict cadmium-induced osteoporosis or fracture if BMD data is not available.

The Influence of Opioid Use Disorder on Open Reduction and Internal Fixation following Ankle Fracture

Category:Ankle; OtherIntroduction/Purpose:Ankle fractures are common injuries that may require surgical treatment consisting of open reduction and internal fixation (ORIF). Injuries associated with increased pain levels are also correlated with increased opioid use, which is also recognized as a risk factor for bone fracture. There is a paucity of literature evaluating the impact of patients with a history of opioid use disorder (OUD) on postoperative complications following ORIF for ankle fracture. This study aims to investigate whether OUD patients are at greater odds of: 1) readmission rates, 2) emergency room visits, and 3) costs of care.Methods:Patients undergoing ORIF for ankle fracture with a 90-day history of OUD prior to the procedure were identified using national health insurance claims database. We selected patients that underwent surgical corrections as recorded by the following current procedural terminology (CPT) medical codes: 27792, 27814, 27822, 27823, 27766, 27829, and 27769. We matched cases with OUD to controls with a 1:4 of OUD to non-OUD controls. Variables that were matched between non-controls and controls included age, sex, Elixhauser- Comorbidity Index (ECI), in addition to comorbidities including diabetes, hyperlipidemia, hypertension, and tobacco usage. Logistic regression analysis was used to calculate odds-ratios (OR) for outcomes of 90-day readmission rates and emergency room visits. Welch’s t-test was used to test for significance of outcomes of cost of care and ECI between the cohorts. A p-value less than 0.001 was statistically significant.Results:A total of 2,198 patients were included with (n= 485) and without (n = 1,698) OUD undergoing ORIF for ankle fracture (Table 1). OUD patients undergoing ORIF for ankle fractures were found to have a higher incidence and odds of 90-day readmission rates compared to controls (8.65 vs. 7.30%; OR: 1.20, 95%CI: 0.83 - 1.73, p=0.320), but failed to reach statistical significance. OUD patients were found to have a higher incidence and odds of emergency room visits compared to controls (3.50 vs. 0.64%; OR: 5.57, 95% CI: 2.59 - 11.97, p<0.0001). OUD patients also incurred significantly higher costs of care compared to controls ($5,921.59 vs. $5,128.22, p<0.0001).Conclusion:Patients with OUD have greater odds of 90-day hospital readmission rates, emergency room visits, and costs of care following ORIF procedures for ankle fracture. These outcomes are consistent with previous research which found increased costs associated with individuals diagnosed with OUD prior to undergoing other foot and ankle procedures. This study, establishes that patients with OUD place a significant, but preventable, financial burden on healthcare resources. The findings of this study highlight the role that foot and ankle orthopaedic surgeons can play in reducing healthcare costs and improving patient outcomes by addressing OUD prior to the occurrence of injury.

Mechanism of osteoporosis in patients with Parkinson's disease

Background: The purpose of this study was to investigate the mechanism of osteoporosis in Parkinson's disease (PD). Osteoporosis in PD is an important issue in maintaining the quality of life better, because it is a risk factor for bone fracture. Osteoporosis and bone metabolism are influenced by sex and age as well as nutrition and physical activity. Therefore, we conducted these matched case-control study.

Selenium: A Trace Element for a Healthy Skeleton - A Narrative Review.

Inadequate serum selenium levels may delay the growth and physiological changes in bone metabolism. In humans, reduced serum selenium concentrations are associated with both increased bone turnover and reduced bone mineral density. Moreover, a reduced nutritional intake of selenium may lead to an increased risk of bone disease. Therefore, selenium is an essential nutrient playing a role in bone health, probably due to specific selenium-proteins. Some selenium-proteins have an antioxidation enzymatic activity and participate in maintaining the redox cellular balance, regulating inflammation and proliferation/differentiation of bone cells too. At least nine selenium-proteins are known to be expressed by fetal osteoblasts and appear to protect bone cells from oxidative stress at bone microenvironment. Mutations of selenium-proteins and reduced circulating levels of selenium are known to be associated with skeletal diseases such as the Kashin-Beck osteoarthropathy and postmenopausal osteoporosis. In addition, the intake of selenium appears to be inversely related to the risk of hip fragility fractures. Recent data suggest that an altered selenium state may affect bone mass even in males and selenium-proteins and selenium concentrations were positively associated with the bone mass at femoral, total and trochanteric sites. However, selenium, but not selenium-proteins, seems to be associated with femoral neck bone mass after adjustment for many bone fracture risk factors. The present review summarizes the findings of observational and interventional studies, which have been designed for investigating the relationship between selenium and bone metabolism.

Predictive Power of Bone Turnover Biomarkers to Estimate Bone Mineral Density after Kidney Transplantation with or without Denosumab: A post hoc Analysis of the POSTOP Study

Background: Low bone mineral density (BMD) represents a major risk factor for bone fractures in patients with chronic kidney disease (CKD) as well as after kidney transplantation. However, modalities to solidly predict patients at fracture risk are yet to be defined. Better understanding of bone turnover biomarkers (BTMs) may close this diagnostic gap. This study strives to correlate BTMs to BMD in kidney transplant recipients. Methods: Changes in BTMs – procollagen type I N-terminal propeptide (P1NP), bone-specific alkaline phosphatase (BSAP), β-isomer of the C-terminal telopeptide of type I collagen, and urine deoxypyridinoline/Cr – at the time of transplant and 3 months were correlated to changes in BMD measured by dual-energy X-ray absorptiometry at the time of transplant, 6, and 12 months, respectively. Half of the collective was treated with denosumab twice yearly in addition to the standard treatment with calcium and vitamin D. Results: Changes in bone formation markers BSAP and P1NP within 3 months showed a significant negative correlation to changes in BMD at the hip within 6 months in denosumab-naïve patients. This correlation was abrogated by denosumab treatment. Conclusions: Changes in BSAP and P1NP showed promise in short-term prediction of BMD. We suggest further trials expanding on the knowledge of these BTMs with assessment of fracture risk, sequential measurements of BTMs within the first 6 months, and the additional use of computed tomography to assess BMD.

Short Communication: Low Muscle Mass Is Associated with Osteoporosis in Older Adults Living with HIV.

Sarcopenia, age-related low muscle mass and function, is a well-established independent risk factor for bone fracture in the geriatric population but is understudied in older people living with HIV (PLWH). The objective of this cross-sectional study was to investigate in older PLWH the relationship between muscle mass and bone mineral density (BMD). Sedentary PLWH who were ≥50 years of age, receiving antiretroviral therapy, and enrolled in an exercise intervention trial were included. Established definitions for sarcopenia and osteopenia/osteoporosis were applied to muscle mass data and BMD collected by dual-energy X-ray absorptiometry before exercise training. Participants were 93% male and 33% Caucasian race with median age 61 years, and median CD4 lymphocytes 707 cells/μL. The majority (64%) were overweight and obese by body mass index. Appendicular skeletal muscle index (ASMI) correlated with BMD at the femoral neck (r = 0.49, p < .01), total hip (r = 0.54, p < .01), and lumbar spine (r = 0.48, p < .05). Low BMD at the femoral neck was present in 39% (26% osteopenia, 13% osteoporosis). ASMI was lower among those with low BMD compared with normal BMD (p = .02). Low muscle mass measured by ASMI is associated with low BMD in clinically stable older PLWH. Detailed body composition assessment may help guide lifestyle recommendations to prevent bone fractures in older PLWH.

Voluntary Chronic Heavy Alcohol Consumption in Male Rhesus Macaques Suppresses Cancellous Bone Formation and Increases Bone Marrow Adiposity.

Chronic heavy alcohol consumption is an established risk factor for bone fracture, but comorbidities associated with alcohol intake may contribute to increased fracture rates in alcohol abusers. To address the specific effects of alcohol on bone, we used a nonhuman primate model and evaluated voluntary alcohol consumption on: (i) global markers of bone turnover in blood and (ii) cancellous bone mass, density, microarchitecture, turnover, and microdamage in lumbar vertebra. Following a 4-month induction period, 6-year-old male rhesus macaques (Macaca mulatta, n=13) voluntarily self-administered water or ethanol (EtOH; 4% w/v) for 22h/d, 7 d/wk, for a total of 12months. Control animals (n=9) consumed an isocaloric maltose-dextrin solution. Tetracycline hydrochloride was administered orally 17 and 3days prior to sacrifice to label mineralizing bone surfaces. Global skeletal response to EtOH was evaluated by measuring plasma osteocalcin and carboxyterminal collagen cross-links (CTX). Local response was evaluated in lumbar vertebra using dual-energy X-ray absorptiometry, microcomputed tomography, static and dynamic histomorphometry, and histological assessment of microdamage. Monkeys in the EtOH group consumed an average of 2.8±0.2 (mean±SE) g/kg/d of EtOH (30±2% of total calories), resulting in an average blood EtOH concentration of 88.3±8.8mg/dl 7hours after the session onset. Plasma CTX and osteocalcin tended to be lower in EtOH-consuming monkeys compared to controls. Significant differences in bone mineral density in lumbar vertebrae 1 to 4 were not detected with treatment. However, cancellous bone volume fraction (in cores biopsied from the central region of the third vertebral body) was lower in EtOH-consuming monkeys compared to controls. Furthermore, EtOH-consuming monkeys had lower osteoblast perimeter and mineralizing perimeter, no significant difference in osteoclast perimeter, and higher bone marrow adiposity than controls. No significant differences between groups were detected in microcrack density (2nd lumbar vertebra). Voluntary chronic heavy EtOH consumption reduces cancellous bone formation in lumbar vertebra by decreasing osteoblast-lined bone perimeter, a response associated with an increase in bone marrow adiposity.