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OBJECTIVE: The objective of this observational, descriptive, cross-sectional, multicentre study was to assess the perceived quality and grade of satisfaction expressed by patients with chronic arthropathies regarding the use of musculoskeletal (MSK) ultrasonography by rheumatologists as an integrated clinical care tool. METHODS: All Spanish rheumatology departments with MSK ultrasonography incorporated in their healthcare services were invited to participate in the study. A Spanish-language survey was offered to fill out anonymously to all consecutive patients with chronic arthropathies under follow-up in the rheumatology outpatient clinics who attended their centre for a period of 3 months. The survey consisted of three sections. The first section contained patients' demographics, disease data, frequency of performing rheumatological ultrasound and information about who performed their ultrasound assessments. The second section consisted of 14 questions about patient's experience and opinion on different aspects of the management, performance and perceived usefulness of performing ultrasound, to be answered on a Likert scale 1-5. The third section of the survey was addressed to the rheumatologist ultrasonographers. RESULTS: Nine hundred and four patients from 16 university hospital rheumatology departments completed the survey. All questions reached an overall favourable response ≥ 80%. Patients who reported usual ultrasound examinations in their rheumatology care and those in which it was their attending rheumatologist who performed the ultrasound assessments responded more favourably. CONCLUSION: Our encouraging patient-centred results may be useful in facilitating the implementation of rheumatological ultrasound in rheumatology care worldwide. Key Points ⢠This is the largest multicentre survey carried out in patients with chronic joint diseases designed to assess their experience and perceived benefits with the use of ultrasonography performed by rheumatologists in daily practice. ⢠Musculoskeletal ultrasound incorporated into rheumatology care was very well accepted and valued by most patients. ⢠The patients perceived that ultrasonography helps not only their rheumatologist but also themselves to better understand their condition. ⢠The patients believed that ultrasonography helps them accept and comply with the proposed treatment.
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Artropatias , Doenças Reumáticas , Reumatologia , Humanos , Reumatologia/métodos , Estudos Transversais , Ultrassonografia/métodos , Doenças Reumáticas/diagnóstico por imagemRESUMO
OBJECTIVE: To describe postprandial lipidemia in patients with rheumatoid arthritis (RA) and to analyze its association with subclinical atherosclerosis and inflammatory activity. METHODS: Observational study of 80 cases of RA and 80 sex- and age-matched controls. We excluded individuals with dyslipidemia. Postprandial hyperlipidemia (PPHL) was defined as postprandial triglycerides >220 mg/dL and/or postprandial ApoB48 levels >75th percentile (>p75). Plasma lipids, cholesterol, triglycerides, ApoB48, and total ApoB were evaluated at baseline and after a meal. Other variables analyzed included subclinical atherosclerosis (defined as presence of carotid atheromatous plaque), inflammatory activity (disease activity score (DAS28-ESR)), cytokines, apolipoproteins, and physical activity. A multivariate analysis was performed to identify factors associated with PPHL in patients with RA. RESULTS: A total of 75 patients with RA and 67 healthy controls fulfilled the inclusion criteria. PPHL was more frequent in patients with RA than controls (No. (%), 29 (38.70) vs. 15 (22.40); p = 0.036), as was subclinical atherosclerosis (No. (%), 22 (30.10) vs. 10 (14.90); p = 0.032). PPHL in patients with RA was associated with subclinical atherosclerosis (OR (95% CI) 4.69 (1.09-12.11); p = 0.037), TNF-α (OR (95% CI) 2.00 (1.00-3.98); p = 0.048), high-sensitivity C-reactive protein (OR (95% CI) 1.10 (1.01-1.19); p = 0.027), and baseline triglycerides (OR (95% CI) 1.02 (1.00-1.04); p = 0.049). CONCLUSION: PPHL was more frequent in patients with RA than in controls. PPHL in patients with RA was associated with inflammation and subclinical atherosclerosis.
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OBJECTIVE: Sarcopenia is a major cause of morbidity in rheumatoid arthritis patients. Our purpose was to determine whether polyautoimmunity is associated with sarcopenia and alterations in whole body composition in patients with rheumatoid arthritis (RA). METHODS: We performed a cross-sectional observational study of a series of cases of RA. All patients were recruited consecutively from a rheumatology clinic. Body composition by dual-energy x-ray absorptiometry (DEXA) was assessed. The variables of interest were polyautoimmunity (RA associated with other autoimmune diseases), sarcopenia, fat mass, and body mass index (BMI). Other variables included were clinical-analytical and inflammatory cytokines and adipokines. The relationship between sarcopenic obesity and the presence of polyautoimmunity was studied using multivariate analysis. RESULTS: Of the 94 patients with RA included in the study, 15 (16%) had polyautoimmunity. A total of 23 patients with RA (24.5%) had sarcopenia, which was more prevalent in patients with polyautoimmunity than in patients without polyautoimmunity (46.7% vs 20.3%; p = .029). Sarcopenia was not associated with body fat content (p = .870) or with BMI (p = .998). The multivariate analysis showed the factors associated with polyautoimmunity in RA to be sarcopenia (odds ratio [95% CI], 4.80 [1.49-13.95]), BMI (1.18 [1.04-1.35]), and resistin (1.249 [1.01-1.53]). CONCLUSION: Sarcopenia and obesity were more prevalent in patients with RA and polyautoimmunity. Resistin values were also higher in this group than in patients with RA without polyautoimmunity.
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Artrite Reumatoide , Sarcopenia , Humanos , Sarcopenia/complicações , Resistina , Estudos Transversais , Obesidade/complicações , Artrite Reumatoide/complicaçõesRESUMO
OBJECTIVE: To describe the frequency of polyautoimmunity and multiple autoimmune syndrome in patients with rheumatoid arthritis (RA) and patients with systemic lupus erythematosus (SLE). PATIENTS AND METHODS: This was a cross-sectional observational study of patients with RA, SLE, and controls without autoimmune rheumatic disease. Cases were those with RA according to the 2010 American College of Rheumatology/European League Against Rheumatism criteria and SLE according to the 2019 American College of Rheumatology/European League Against Rheumatism criteria, consecutively recruited in a rheumatology clinic. Controls were subjects with no rheumatic autoimmune disease (AIDs) recruited in the same area. Patients filled out a questionnaire on polyautoimmunity. Variables of interest were polyautoimmunity (RA or SLE with other AIDs), whereas secondary variables were rheumatic, skin, endocrine, digestive, and neurological AIDs. Multiple autoimmune syndrome is defined as the presence of 3 or more AIDs and a family history of AIDs. Statistical analyses performed were descriptive, bivariate, and multivariate (dependent variable: polyautoimmunity). RESULTS: The study population comprised 109 patients with RA, 105 patients with SLE, and 88 controls. Polyautoimmunity was recorded in 15 patients with RA (13.8%), 43 with SLE (41%), and 2 controls (2.2%). The most frequent AID in RA was Sjögren syndrome (53.3%), followed by Hashimoto thyroiditis and psoriasis; the most frequent AIDs in SLE were Sjögren syndrome (55.8%) and antiphospholipid syndrome (30.2%), followed by Hashimoto thyroiditis. Obesity was associated with polyautoimmunity in RA (odds ratio [OR], 3.362; p = 0.034). In SLE, joint damage (OR, 2.282; p = 0.038) and anti-RNP antibodies (OR, 5.095; p = 0.028) were risk factors for polyautoimmunity, and hydroxychloroquine was a protective factor (OR, 0.190; p = 0.004). CONCLUSIONS: Polyautoimmunity is frequent in RA and even more frequent in SLE. It was associated with obesity in RA and with joint damage and anti-RNP in SLE. Hydroxychloroquine was a protector.
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Artrite Reumatoide , Doenças Autoimunes , Lúpus Eritematoso Sistêmico , Síndrome de Sjogren , Artrite Reumatoide/diagnóstico , Artrite Reumatoide/tratamento farmacológico , Artrite Reumatoide/epidemiologia , Estudos Transversais , Humanos , Lúpus Eritematoso Sistêmico/diagnóstico , Lúpus Eritematoso Sistêmico/epidemiologia , Síndrome de Sjogren/diagnóstico , Síndrome de Sjogren/epidemiologiaRESUMO
OBJECTIVE: To assess the effectiveness, safety and cost of Etanercept biosimilar in patients with rheumatoid arthritis (RA), spondyloarthritis (SpA) and psoriatic arthritis (PsA) compared to the standard drug in real clinical practice. PATIENTS AND METHODS: Retrospective observational study. Case series of 138 patients with RA, SpA or PsA treated with at least one dose of Benepali® (nâ¯=â¯79) or Enbrel® (nâ¯=â¯59). Drug retention time was the primary efficacy endpoint compared to the biosimilar and the original. The proportion of patients achieving low disease activity or remission after 52â¯weeks was used as the secondary outcome. Safety was assessed by means of the adverse effects incidence rate. A cost minimization analysis was performed. RESULTS: No differences were observed regarding treatment retention time between drugs (median [95% confidence interval, 95%â¯CI] at 12.0â¯months [10.2-12.0] for the biosimilar and 12.0â¯months [12.0-12.0] for the original). Similar improvements, in terms of inflammatory activity and physical function, were obtained after 52â¯weeks except for patients with SpA and PsA who, in general, experienced improvements of BASDAI and ASDAS with the original compared with the biosimilar. No significant differences were observed in the total number of adverse effects (.43 events/patient-years versus the biosimilar and .53 versus the original). Using the biosimilar in place of the original drug resulted in a net savings of 118,383.55⯠(1,747.20â¯/patient-years) for the hospital. CONCLUSION: The biosimilar Benepali is as effective and safe as the original and much more cost-effective.
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Antirreumáticos , Artrite Psoriásica , Artrite Reumatoide , Medicamentos Biossimilares , Antirreumáticos/uso terapêutico , Artrite Psoriásica/tratamento farmacológico , Artrite Reumatoide/tratamento farmacológico , Medicamentos Biossimilares/efeitos adversos , Etanercepte/uso terapêutico , HumanosRESUMO
OBJECTIVES: To describe a prospective cohort of patients with rheumatoid arthritis associated with interstitial lung disease (RA-ILD) and identify risk factors associated with disease progression and mortality in this cohort. PATIENTS AND METHODS: We performed a multicenter, prospective, observational study of patients with RA-ILD receiving disease-modifying antirheumatic drugs (DMARDs) between 2015 and 2020. The patients were assessed using high-resolution computed tomography and pulmonary function tests at baseline and at 60 months. The main endpoint was "Progression to ILD at the end of follow-up" in terms of the following outcomes: (1) improvement (i.e., improvement in forced vital capacity (FVC) ≥10% or diffusing capacity of the lungs for carbon monoxide (DLCO) ≥15% and absence of radiological progression); (2) nonprogression (stabilization or improvement in FVC ≤10% or diffusing capacity of the lungs for carbon monoxide (DLCO) <15% and absence of radiological progression); (3) progression (worsening of FVC >10% or DLCO >15% and radiological progression); or (4) death. We recorded demographic and clinical characteristics, lung function, and the incidence of adverse events. A Cox regression analysis was performed to identify factors associated with the worsening of ILD. RESULTS: After 60 months, lung disease had stabilized in 66 patients (56.9%), improved in 9 (7.8%), and worsened in 23 (19.8%). Eighteen patients (15.5%) died, with a mean survival of 71.8 (1.9) months after diagnosis of ILD. The Cox multivariate analysis revealed the independent predictors of worsening of RA-ILD to be usual interstitial pneumonia (hazard ratio (HR), 2.6 (95%CI, 1.0-6.7)), FVC <80% (HR, 3.8 (95%CI, 1.5-6.7)), anticitrullinated protein antibody titers (HR, 2.8 (95%CI, 1.1-6.8)), smoking (HR, 2.5 (95%CI, 1.1-6.2)), and treatment with abatacept, tocilizumab, or rituximab (HR, 0.4 (95%CI, 0.2-0.8)). During follow-up, 79 patients (68%) experienced an adverse event, mostly infection (61%). Infection was fatal in 10/18 patients (55.5%) during follow-up. CONCLUSIONS: Lung function is stable in most patients with RA-ILD receiving treatment with disease-modifying anti-rheumatic drugs (DMARDs), although one-third worsened or died. Identifying factors associated with worsening in RA-ILD is important for clinical management.
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OBJECTIVES: To analyze the diagnostic utility of lung ultrasound (US) to detect interstitial lung disease (ILD) in rheumatoid arthritis (RA) patients comparing with high-resolution computed tomography (HRCT) PATIENTS AND METHODS: We performed a cross-sectional, observational study in patients with RA-ILD (cases) controlled with a group of RA patients without ILD (controls) paired by sex, age, and time of disease evolution. Patients were assessed using HRCT, PFT, and US. The main variables were B-line number, evaluation of the lung-US score already described, pleural irregularities, and A pattern US lost. ROC curve analysis was performed to establish the cut-off point of the US B-lines number for detecting the presence of significant RA-ILD in relation to HRCT, and logistic regression analysis was performed to identify the intercostal spaces. RESULTS: Seventy-one patients were included, 35 (49.2%) with ILD-RA and 36 (50.8%) RA controls. Regarding US score, we found that the detection of 5.5 lines in a reduced score of 8 intercostal spaces had a sensitivity = 62.2%, specificity = 91.3%, PPV = 88.4%, and NPV = 69.5%. In multivariate analysis, the intercostal spaces which showed independent association with ILD were 3rd right anterior axillary space (OR [IC 95%] 19.0 [1.3-27.5]), 8th right posterior axillary space (OR [IC 95%] 0.04 [0.0-0.6]), 8th right subscapular space (OR [IC 95%] 16.5 [1.8-45.5]), 9th right paravertebral space (OR [IC 95%] 7.11 [1.0-37.1]), and 2nd left clavicular middle space (OR [IC 95%] 21.9 [1.26-37.8]). CONCLUSIONS: Lung ultrasound could be a useful tool for ILD diagnosis associated with rheumatoid arthritis. A 8-space reduced score showed a similar total predictive capacity than 72-space score. Key Points ⢠Lung ultrasound could be a useful tool for ILD diagnosis associated with rheumatoid arthritis. ⢠The 72-space evaluation is highly sensitive, whereas a simplified score enables a more specific and faster diagnosis. ⢠The number of B lines is correlated with DLCO, ACPA, inflammatory activity, and physical function.
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Artrite Reumatoide , Doenças Pulmonares Intersticiais , Artrite Reumatoide/complicações , Artrite Reumatoide/diagnóstico por imagem , Estudos Transversais , Humanos , Pulmão/diagnóstico por imagem , Doenças Pulmonares Intersticiais/complicações , Doenças Pulmonares Intersticiais/diagnóstico por imagem , UltrassonografiaRESUMO
OBJECTIVES: To analyze the effect of disease-modifying antirheumatic drugs (DMARDs) on the outcome of interstitial lung disease secondary to rheumatoid arthritis (RA-ILD). PATIENTS AND METHODS: We performed a multicenter, prospective, observational study of patients with RA-ILD receiving DMARDs between 2015 and 2017. The patients were assessed using high-resolution computed tomography and pulmonary function tests at baseline and at 24 months. The radiological assessment was centralized. The main outcome measure at 24 months was changed in lung function (improvement, stabilization, worsening, or death). We recorded the 28-joint Disease Activity Score 28 (DAS28) and adverse events. A logistic regression analysis was performed to identify factors associated with worsening of ILD. RESULTS: After 24 months, lung disease was stabilized in 40 patients (57.1%), improved in 8 (11.4%), and worse in 21 (30.0%). One patient (1.4%) died. The factors associated with worsening of ILD in the multivariate analysis were treatment with abatacept, tocilizumab, or rituximab (OR, 0.102 [95%CI, 0.015-0.686]), DAS28 (OR, 1.969 [95%CI, 1.005-3.857]), and smoking (OR, 6.937 [95%CI, 1.378-4.900]). During follow-up, 30 patients (42.9%) experienced an adverse event, which was severe in 12 cases (17.1%). CONCLUSIONS: Lung function is stable and inflammatory activity well controlled in most patients with RA-ILD receiving treatment with DMARDs. Non-anti-TNF DMARDs reduce the risk of worsening of lung disease in 90% of patients. The inflammatory activity of RA and smoking, on the other hand, are associated with worsening. Key Points ⢠We have performed prospectively evaluated lung and joint function in patients with RA-ILD receiving treatment with various DMARDs. ⢠In our study, the lung function is stable and inflammatory activity well controlled in most patients with RA-ILD receiving treatment with DMARDs. ⢠Neither csDMARDs nor anti-TNF agents were associated with a significant risk of worsening of lung disease, whereas non-anti-TNF bDMARDs could reduce the risk of worsening of lung disease. ⢠Smoking and poor control of joint involvement were the main factors associated with worsening of lung disease.
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Antirreumáticos , Artrite Reumatoide , Doenças Pulmonares Intersticiais , Antirreumáticos/efeitos adversos , Artrite Reumatoide/complicações , Artrite Reumatoide/tratamento farmacológico , Humanos , Doenças Pulmonares Intersticiais/tratamento farmacológico , Estudos Prospectivos , Fator de Necrose Tumoral alfa/uso terapêuticoRESUMO
Ultrasound is a widely implemented imaging modality in rheumatology practice that implies a great interaction between patient and professional. The COVID-19 pandemic requires a change in our clinical practice, through the adoption of new strategies that allow comprehensive care for our patients, guaranteeing the safety of both patients and healthcare professionals. OBJETIVE: Our objective was to develop practical recommendations, agreed among a panel of experts, on the use and safety of rheumatological ultrasound during the COVID-19 pandemic. METHODS: We performed a narrative review of the available literature. Based on the literature review, we produced preliminary recommendations that were subsequently agreed among a panel of experts using the Delphi methodology with a 1-5 Likert scale. Agreement for each recommendation was considered if 75% of the panel members scored the item ≥4 on the Likert scale. RESULTS: 5 overarching principles and 28 recommendations were issued and agreed among the panel. Group consensus was achieved in 100% of items. CONCLUSIONS: The document provides useful information about preventive measures in the practice of ultrasound in rheumatology in times of a COVID-19 pandemic based on the experience and literature available to date.
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COVID-19/prevenção & controle , Controle de Infecções/normas , Pandemias , Reumatologia/métodos , Ultrassonografia , COVID-19/transmissão , Desinfecção/métodos , Desinfecção/normas , Contaminação de Equipamentos/prevenção & controle , Géis , Humanos , Controle de Infecções/métodos , Transmissão de Doença Infecciosa do Paciente para o Profissional/prevenção & controle , Transmissão de Doença Infecciosa do Profissional para o Paciente/prevenção & controle , Angioscopia Microscópica/instrumentação , Angioscopia Microscópica/métodos , Óleos , Equipamento de Proteção Individual , Doenças Reumáticas/diagnóstico por imagem , SARS-CoV-2 , Ultrassonografia/instrumentação , Ultrassonografia/métodosRESUMO
Ultrasound is a widely implemented imaging modality in rheumatology practice that implies a great interaction between patient and professional. The COVID-19 pandemic requires a change in our clinical practice, through the adoption of new strategies that allow comprehensive care for our patients, guaranteeing the safety of both patients and healthcare professionals. Objetive: Our objective was to develop practical recommendations, agreed among a panel of experts, on the use and safety of rheumatological ultrasound during the COVID-19 pandemic. Methods: We performed a narrative review of the available literature. Based on the literature review, we produced preliminary recommendations that were subsequently agreed among a panel of experts using the Delphi methodology with a 1-5 Likert scale. Agreement for each recommendation was considered if 75% of the panel members scored the item ≥4 on the Likert scale. Results: 5 overarching principles and 28 recommendations were issued and agreed among the panel. Group consensus was achieved in 100% of items. Conclusions: The document provides useful information about preventive measures in the practice of ultrasound in rheumatology in times of a COVID-19 pandemic based on the experience and literature available to date.
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OBJECTIVE: To describe postprandial lipemia in patients with rheumatoid arthritis (RA) and to analyze its association with subclinical atherosclerosis measured as carotid intima-media thickness (cIMT). METHODS: We performed an observational study of 40 patients with RA and 40 sex and age-matched controls. Patients with dyslipidemia were excluded. Pathologically increased cIMT was defined as a carotid thickness greater than the 90th percentile (>p90) for age and sex. Fasting and postprandial plasma lipids, cholesterol, triglycerides, apolipoprotein B48 (ApoB48), and total ApoB were evaluated. The other variables included were clinical and laboratory values, Framingham score, and the 28-joint Disease Activity Score (DAS28). Two multivariate models were constructed to identify factors associated with pathologic cIMT in patients with RA. RESULTS: Fasting lipid values were similar in patients with RA and controls, although those of postprandial ApoB48 were higher (median (IQR), 14.4 (10.8-12.1) vs. 12.1 (2.3-9,8); p = 0.042). Pathologic cIMT was recorded in 10 patients with RA (25%) and nine controls (22.5%). In patients with RA, pathologic cIMT was associated with postprandial ApoB48 (OR (95% CI), 1.15 (1.0-1.3)) and total ApoB (OR [95% CI], 1.12 [1.1-1.2]). The second model revealed a mean increase of 0.256 mm for cIMT in patients with elevated anticitrullinated protein antibodies (ACPAs). CONCLUSION: Postprandial ApoB48 levels in patients with RA are higher than in controls. Postprandial ApoB48 and total ApoB levels and markers of severity, such as ACPAs, are associated with pathologic cIMT in patients with RA. Our findings could indicate that these atherogenic particles have a negative effect on the endothelium.
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The aims of this study were to evaluate adherence of rheumatoid arthritis (RA) patients to biological disease-modifying antirheumatic drugs (bDMARDs), identify potential risk factors, and analyze the discriminative ability of the Morisky-Green test (MGT) to detect bDMARD nonadherence. One hundred and seventy-eight adult RA patients treated with bDMARDs were included. Adherence was measured using the medication possession ratio (MPR) of the previous 6 months. An MPR >80% was considered good adherence. Patient demographics, clinical characteristics, and MGT scores were assessed through a standardized clinical interview at the cross-sectional date. One-hundred and twelve patients (63%) were taking subcutaneous bDMARDs, while 66 (37%) were taking intravenous drugs. One-hundred fifty-eight (88.8%) showed good adherence to bDMARDs, while 79 (61.2%) also correctly took concomitant conventional synthetic DMARDs (csDMARDs). In logistic regression models, nonadherence to bDMARDs was associated with higher disease activity [odds ratio (OR) 1.45; 95% CI, 1.03-2.03; p = 0.032] and subcutaneous route (OR 3.70; 95% CI 1.02-13.48; p = 0.040). MGT accurately identified an MPR >80% of bDMARDs in 76.9% of the patients. A sensitivity of 78%, specificity of 70%, positive predictive value of 95.3%, negative predictive value of 28.5%, positive likelihood ratio (LR) of 2.6, and negative LR of 0.3% were obtained. Adherence may be good for bDMARDs but is low for csDMARDs. Low adherence for bDMARDs is associated with poorer disease control during the past 6 months and use of subcutaneous route. These findings should alert doctors to consider possible low adherence before declaring treatment failure.
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Antirreumáticos/uso terapêutico , Artrite Reumatoide/tratamento farmacológico , Produtos Biológicos/uso terapêutico , Adesão à Medicação , Adulto , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do TratamentoRESUMO
We evaluated the efficacy of a triage approach based on a combination of osteoporosis risk-assessment tools plus peripheral densitometry to identify low bone density accurately enough to be useful for clinical decision making in postmenopausal women. We conducted a cross-sectional diagnostic study in postmenopausal Caucasian women from primary and tertiary care. All women underwent dual-energy X-ray absorptiometric (DXA) measurement at the hip and lumbar spine and were categorized as osteoporotic or not. Additionally, patients had a nondominant heel densitometry performed with a PIXI densitometer. Four osteoporosis risk scores were tested: SCORE, ORAI, OST, and OSIRIS. All measurements were cross-blinded. We estimated the area under the curve (AUC) to predict the DXA results of 16 combinations of PIXI plus risk scores. A formula including the best combination was derived from a regression model and its predictability estimated. We included 505 women, in whom the prevalence of osteoporosis was 20 %, similar in both settings. The best algorithm was a combination of PIXI + OST + SCORE with an AUC of 0.826 (95 % CI 0.782-0.869). The proposed formula is Risk = (-12) × [PIXI + (-5)] × [OST + (-2)] × SCORE and showed little bias in the estimation (0.0016). If the formula had been implemented and the intermediate risk cutoff set at -5 to 20, the system would have saved
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Algoritmos , Osteoporose Pós-Menopausa/diagnóstico por imagem , Absorciometria de Fóton , Densidade Óssea , Estudos Transversais , Densitometria , Feminino , Humanos , Pessoa de Meia-Idade , Osteoporose Pós-Menopausa/epidemiologia , Medição de RiscoRESUMO
AIM: To determine whether rheumatoid arthritis (RA) patients who have been prescribed biological agents exhibit a different comorbidity burden than RA patients who take disease-modifying antirheumatic drugs (DMARDs) alone, and to understand the association between comorbidity and other variables, as well as the association between comorbidity and multimorbidity. METHODS: This observational case-control study included 114 RA patients treated with biological agents and a control group comprising 163 sex- and age-matched RA patients treated with DMARDs only. Current and previous data regarding the patients' disease activity, comorbidities, and treatments were collected. The data were analysed using bivariate and multivariate regression models. RESULTS: The patients who were prescribed biological agents exhibited poorer disease control, received more DMARDs and steroids, and underwent more total joint arthroplasties compared with the patients in the control group. However, the risk factors for cardiovascular disease and the comorbidity frequency were similar between cases and controls. The most prevalent comorbidities were hypertension, obesity, and respiratory, thyroid, and upper gastrointestinal disorders. The incidence of cardiovascular disease was low, and only 29% of the patients exhibited multimorbidities. A bivariate association of age, late diagnosis, joint replacements and a high score on the health assessment questionnaire score (HAQ) with comorbidity was observed. There were also correlations between the Charlson index and age, joint reconstructive surgery, disease activity (DAS28), and HAQ score. However, when binary logarithmic regression models were applied, only patient age remained significantly associated with comorbidity and multimorbidity [hazard ratio, 1.08; 95% confidence interval, 1.05-1.12; p<0.0005]. CONCLUSION: RA patients taking biological drugs have a comorbidity burden equivalent to those treated with DMARDs alone. Age is the main predictive factor of comorbidity in these patients.