OBJECTIVE: Idiopathic inflammatory myopathies (IIMs, myositis) are rare systemic autoimmune disorders that lead to muscle inflammation, weakness, and extramuscular manifestations, with a strong genetic component influencing disease development and progression. Previous genome-wide association studies identified loci associated with IIMs. In this study, we imputed data from two prior genome-wide myositis studies and analyzed the largest myositis data set to date to identify novel risk loci and susceptibility genes associated with IIMs and its clinical subtypes. METHODS: We performed association analyses on 14,903 individuals (3,206 patients and 11,697 controls) with genotypes and imputed data from the Trans-Omics for Precision Medicine reference panel. Fine-mapping and expression quantitative trait locus colocalization analyses in myositis-relevant tissues indicated potential causal variants. Functional annotation and network analyses using the random walk with restart (RWR) algorithm explored underlying genetic networks and drug repurposing opportunities. RESULTS: Our analyses identified novel risk loci and susceptibility genes, such as FCRLA, NFKB1, IRF4, DCAKD, and ATXN2 in overall IIMs; NEMP2 in polymyositis; ACBC11 in dermatomyositis; and PSD3 in myositis with anti-histidyl-transfer RNA synthetase autoantibodies (anti-Jo-1). We also characterized effects of HLA region variants and the role of C4. Colocalization analyses suggested putative causal variants in DCAKD in skin and muscle, HCP5 in lung, and IRF4 in Epstein-Barr virus (EBV)-transformed lymphocytes, lung, and whole blood. RWR further prioritized additional candidate genes, including APP, CD74, CIITA, NR1H4, and TXNIP, for future investigation. CONCLUSION: Our study uncovers novel genetic regions contributing to IIMs, advancing our understanding of myositis pathogenesis and offering new insights for future research.
Neuromuskulárne ochorenia (NM) v detskom veku predstavujú výrazne heterogénnu skupinu získaných a vrodených ochorení, pričom mnohé sa vyznačujú svojou zriedkavosťou. V dôsledku extramuskulárnych komplikácií NM ochorení sú detskí pacienti často indikovaní na výkony vyžadujúce anestéziu. Vzhľadom na špecifický perioperačný manažment NM ochorení je často nevyhnutná spolupráca dostatočne skúseného anestéziológa a viacerých odborníkov začlenených do starostlivosti o pacienta. Z uvedeného vyplýva, že aj neurológ musí byť oboznámený s úskaliami, aké prináša anestézia pre NM pacientov. Nesprávny anestéziologický manažment môže viesť na nedostatočne pripravenom a vybavenom pracovisku k ohrozeniu pacienta, eventuálne k nenávratnému zhoršeniu jeho klinického stavu. Článok obsahuje všeobecné odporúčania pre perioperačný manažment NM pacientov, špecifické komplikácie spojené s anestéziou a odporúčania pre vybrané NM ochorenia. Komplexný náhľad na anestéziologickí manažment uvedených klinických jednotiek môže pomôcť ku zlepšeniu orientácie neurológa v starostlivosti o túto zriedkavú skupinu pacientov.
Neuromuscular diseases (NMDs) in childhood represent a markedly heterogenous group of acquired and congenital diseases, many of which are rare. Due to extramuscular complications of NMDs, pediatric patients often require anesthesia for medical procedures. The specific management of NMDs during perioperative periods requires the collaboration of an experienced anesthesiologist and several other experts involved in patient care. It is essential also for neurologists to be familiar with the challenges that anesthesia brings to NM patients. Improper management of anesthesia in an inadequately prepared and equipped workplace can lead to patient endangerment, possibly irreversible deterioration of the patient’s condition. The article provides general recommendations for perioperative management of patients with NMDs, specific complications associated with anesthesia, and recommendations for selected NMDs. A comprehensive overview of anesthetic management in NMDs may help to improve the neurologist´s orientation in the care for this rare group of patients.
- MeSH
- Anesthesia * methods MeSH
- Child * MeSH
- Risk Assessment MeSH
- Humans MeSH
- Malignant Hyperthermia etiology prevention & control MeSH
- Neuromuscular Diseases * complications MeSH
- Perioperative Care methods MeSH
- Intraoperative Complications prevention & control MeSH
- Intraoperative Care MeSH
- Rhabdomyolysis etiology prevention & control MeSH
- Risk Factors MeSH
- Check Tag
- Child * MeSH
- Humans MeSH
OBJECTIVES: To compare clinical characteristics, including the frequency of cutaneous, extramuscular manifestations and malignancy, between adults with anti-synthetase syndrome (ASyS) and DM. METHODS: Using data regarding adults from the MYONET registry, a cohort of DM patients with anti-Mi2/-TIF1γ/-NXP2/-SAE/-MDA5 autoantibodies, and a cohort of ASyS patients with anti-tRNA synthetase autoantibodies (anti-Jo1/-PL7/-PL12/-OJ/-EJ/-Zo/-KS) were identified. Patients with DM sine dermatitis or with discordant dual autoantibody specificities were excluded. Sub-cohorts of patients with ASyS with or without skin involvement were defined based on presence of DM-type rashes (heliotrope rash, Gottron's papules/sign, violaceous rash, shawl sign, V-sign, erythroderma, and/or periorbital rash). RESULTS: In total 1054 patients were included (DM, n = 405; ASyS, n = 649). In the ASyS cohort, 31% (n = 203) had DM-type skin involvement (ASyS-DMskin). A higher frequency of extramuscular manifestations, including Mechanic's hands, Raynaud's phenomenon, arthritis, interstitial lung disease and cardiac involvement differentiated ASyS-DMskin from DM (all P < 0.001), whereas higher frequency of any of four DM-type rashes-heliotrope rash (n = 248, 61% vs n = 90, 44%), violaceous rash (n = 166, 41% vs n = 57, 9%), V-sign (n = 124, 31% vs n = 28, 4%), and shawl sign (n = 133, 33% vs n = 18, 3%)-differentiated DM from ASyS-DMskin (all P < 0.005). Cancer-associated myositis (CAM) was more frequent in DM (n = 67, 17%) compared with ASyS (n = 21, 3%) and ASyS-DMskin (n = 7, 3%) cohorts (both P < 0.001). CONCLUSION: DM-type rashes are frequent in patients with ASyS; however, distinct clinical manifestations differentiate these patients from classical DM. Skin involvement in ASyS does not necessitate increased malignancy surveillance. These findings will inform future ASyS classification criteria and patient management.
- MeSH
- Amino Acyl-tRNA Synthetases immunology MeSH
- Autoantibodies * blood immunology MeSH
- Dermatomyositis * immunology complications MeSH
- Adult MeSH
- Exanthema etiology MeSH
- Lung Diseases, Interstitial immunology etiology MeSH
- Middle Aged MeSH
- Humans MeSH
- Myositis * immunology complications MeSH
- Neoplasms complications MeSH
- Registries * MeSH
- Aged MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Comparative Study MeSH
OBJECTIVE: The ACR-EULAR Myositis Response Criteria (MRC) were developed as a composite measure using absolute percentage change in six core set measures (CSMs). We aimed to further validate the MRC by assessing the contribution of each CSM, frequency of strength vs extramuscular activity improvement, representation of patient-reported outcome measures (PROM), and frequency of CSM worsening. METHODS: Data from adult dermatomyositis/polymyositis patients in the rituximab (n = 147), etanercept (n = 14), and abatacept (n = 19) trials, and consensus patient profiles (n = 232) were evaluated. The Total Improvement Score (TIS), number of improving vs worsening CSMs, frequency of improvement with and without muscle-related CSMs, and contribution of PROM were evaluated by MRC category. Regression analysis was performed to assess contribution of each CSM to the MRC. RESULTS: Of 412 adults with dermatomyositis/polymyositis, there were 37%, 24%, 25%, and 14% with no, minimal, moderate, and major MRC improvement, respectively. The number of improving CSMs and absolute percentage change in all CSMs increased by improvement category. In minimal-moderate improvement, only physician-reported disease activity contributed significantly more than expected by MRC. Of patients with at least minimal improvement, 95% had improvement in muscle-related measures and a majority (84%) had improvement in PROM. Patients with minimal improvement had worsening in a median of 1 CSM, and most patients with moderate-major improvement had no worsening CSMs. Physician assessment of change generally agreed with MRC improvement categories. CONCLUSION: The ACR-EULAR MRC performs consistently across multiple studies, further supporting its use as an efficacy end point in future myositis therapeutic trials.
- MeSH
- Dermatomyositis * drug therapy MeSH
- Adult MeSH
- Consensus MeSH
- Humans MeSH
- Myositis * drug therapy MeSH
- Polymyositis * drug therapy MeSH
- Treatment Outcome MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Research Support, N.I.H., Intramural MeSH
BACKGROUND: Interleukin-35 (IL-35) is a recently described heterodimeric cytokine that belongs to the IL-12 family and consists of p35 (IL-12a) and EBI3 (IL-27b) subunits. The expression of IL-35 in humans is inducible in response to inflammatory stimuli. Increased IL-35 levels were documented in several autoimmune inflammatory diseases, suggesting a possible immunomodulatory role in their pathogenesis. OBJECTIVES: The aim of this study was to explore a potential role of IL-35 in the pathogenesis of idiopathic inflammatory myopathies (IIM) by studying the expression of IL-35 subunits in muscle biopsy samples and by evaluating serum levels of IL-35 and their association with disease activity in IIM patients. METHODS: The expression of IL-35 subunits was studied in serial sections of 9 muscle biopsy samples [4 polymyositis (PM), 5 dermatomyositis (DM)] and in 7 non-inflammatory control muscle biopsies. Serum levels of IL-35 were measured in 23 PM, 28 DM and 15 cancer associated myositis (CAM) patients as well as in 40 healthy controls. Disease activity was evaluated using the Myositis Disease Activity Assessment Tool (MDAAT) and by serum muscle enzymes. RESULTS: Expression of both IL-35 subunits was evident in the inflammatory infiltrates in IIM muscle biopsies, while no IL-35 expression was observed in control muscle samples. IL-35 serum levels were increased in all IIM patients compared to healthy controls [median 119.5 (range 32.1-1074.5) vs 36.2 (range 1.5-86.5) pg/ml, P < 0.001]. There were no differences in IL-35 serum levels between myositis subgroups (DM, PM or CAM). Serum IL-35 levels correlated significantly with physician's assessment of global (r = 0.29, p = 0.021), muscle (r = 0.30, p = 0.017) and extramuscular (r = 0.30, p = 0.016) disease activity as well as creatine kinase (r = 0.26, p = 0.044) and lactate dehydrogenase (r = 0.40, p = 0.003) levels. There was a significant correlation with pulmonary activity in patients with interstitial lung disease (r = 0.39, p = 0.037). Serum IL-35 correlated negatively with duration of treatment (r = -34, p = 0.009). CONCLUSIONS: IL-35 is overexpressed in inflammatory infiltrates in muscle tissue and serum in IIM patients and there is correlation with several disease activity parameters. These data suggest potential role of locally produced IL-35 in the pathogenesis of inflammatory myopathies.
- MeSH
- Biopsy MeSH
- Child MeSH
- Adult MeSH
- Interleukins blood metabolism MeSH
- Middle Aged MeSH
- Humans MeSH
- Adolescent MeSH
- Young Adult MeSH
- Myositis blood metabolism pathology MeSH
- Polymyositis blood metabolism pathology MeSH
- Aged MeSH
- Muscles metabolism pathology MeSH
- Up-Regulation MeSH
- Check Tag
- Child MeSH
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Adolescent MeSH
- Young Adult MeSH
- Male MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Cíl: Popis průběhu a komplikací Duchennovy (DMD) a Beckerovy (BMD) svalové dystrofie v dětském věku. Soubor a metodika: Restrospektivní analýza klinických a laboratorních dat se zaměřením na svalové a mimosvalové komplikace 78 chlapců s dystrofinopatií (65 DMD a 13 BMD) sledovaných v našem nervosvalovém centru v letech 2004–2018. Výsledky: Zatímco chlapci s BMD měli zanedbatelný výskyt sekundárních komplikací, chlapci s DMD byli ohroženi závažnými komplikacemi již od druhé dekády života. Celkem 43 (66 %) chlapců s DMD bylo léčeno kortikoidy. Chlapci léčení kortikoidy v průměru ztratili schopnost chůze o 1,3 roku později než chlapci neléčení (p < 0,001). U 54 % chlapců s DMD starších 12 let byla diagnostikována středně těžká restriktivní plicní porucha, nejvýznamnějším rizikovým faktorem byla ztráta schopnosti chůze (p < 0,001). Sníženou ejekční frakci či fibrózu myokardu mělo 45 % chlapců starších 10 let. Chlapci s DMD měli ve 40 % malý vzrůst, jehož výskyt stoupal s věkem (p < 0,0001). Osteoporóza byla diagnostikována u 22 % chlapců s DMD, častěji u léčených kortikoidy než u neléčených (p = 0,024). Tranzientní proteinurie v biochemickém vyšetření moči byla u 48 % chlapců s DMD. Psychologické odchylky mělo 68 % chlapců s DMD. Závěr: Tato studie vychází z dosud nejrozsáhlejšího souboru dětských pacientů s dystrofinopatií v ČR a zdůrazňuje potřebu multioborového přístupu v péči o ně.
Aim: Description of natural course and variety of complications in Duchenne (DMD) and Becker (BMD) muscular dystrophies in childhood. Patients and methods: Retrospective analysis of clinical and laboratory data with focus on muscular and extramuscular complications in 78 boys with dystrophinopathy (65 with DMD and 13 with BMD) followed up in our neuromuscular centre between 2004 and 2018. Results: The incidence of secondary complications was negligible in boys with BMD. On the other hand, boys with DMD suffered from severe complications from their second decade of age. Overall 43 (66%) of the boys with DMD were treated with glucocorticoids. Glucocorticoid-treated boys lost ability to walk on average 1.3 years later than glucocorticoid-naive boys (P < 0.001). Moderate restrictive lung disease was diagnosed in 54% of boys with DMD older than 12 years of age, and loss of ability to walk was the most significant risk factor (P < 0.001). Decreased ejection fraction or myocardial fibrosis was found in 45% of boys older than 10 years of age. Boys with DMD had short stature in 40%, the incidence of which increased with age (P < 0.0001). Osteoporosis was diagnosed in 22% of boys with DMD, more often in the glucocorticoid-treated group than in glucocorticoid-naive group (P = 0.024). Transient proteinuria was described in 48% of boys with DMD. Psychological aberrations were described in 68% of boys with DMD. Conclusion: This study describes the most extensive cohort of pediatric patients with dystrophinopathy in the Czech Republic and highlights the need of multidisciplinary care.
- MeSH
- Child MeSH
- Muscular Dystrophy, Duchenne * complications MeSH
- Cardiomyopathies MeSH
- Humans MeSH
- Osteoporosis MeSH
- Proteinuria MeSH
- Respiratory Insufficiency MeSH
- Retrospective Studies MeSH
- Patient Care Team MeSH
- Check Tag
- Child MeSH
- Humans MeSH
- Male MeSH
- Publication type
- Research Support, Non-U.S. Gov't MeSH
BACKGROUND: S100A11 (calgizzarin), a member of the S100 family, is associated with oncogenesis, inflammation and myocardial damage. Our aim was to analyse S100A11 in idiopathic inflammatory myopathies (IIMs) and its association with disease activity features and cancer development. METHODS: S100A11 in muscle was determined by immunohistochemistry in polymyositis (PM), dermatomyositis (DM), myasthenia gravis (MG) and in subjects without autoimmune inflammatory disease (HC). S100A11 in plasma was measured in 110 patients with IIMs (PM, DM, and cancer associated myositis (CAM) patients) and in 42 HC. Disease activity was assessed by myositis disease activity assessment (MYOACT), muscle enzymes and C-reactive protein (CRP) were measured by routine laboratory techniques; autoantibodies by immunoprecipitation or by immunoblot. RESULTS: We observed an accumulation of S100A11 in the cytoplasm of regenerating and necrotizing muscle fibres of PM and DM patients. S100A11 was increased in plasma of all myositis patients compared to HC (3.8 (1.5-16.8) vs 2.8 (1.7-11.2)ng/ml, p=0.011) and in DM and CAM patients compared to HC (4.0 (2.2-14.9) and 4.5 (1.5-9.1) vs 2.8 (1.7-11.2)ng/ml, p<0.001 and p=0.022, respectively). In all myositis patients, S100A11 correlated with the levels of lactate dehydrogenase (r=0.256, p=0.011), aspartate aminotransferase (AST) (r=0.312, p=0.002), CRP (r=0.254, p=0.022) and MYOACT (r=0.245, p=0.022). S100A11 was associated with MYOACT (r=0.377, p=0.030) and pulmonary and cutaneous disease activity in DM patients (r=0.408, p=0.017 and r=0.417, p=0.01, respectively). S100A11 was related to the levels of AST (r=0.412, p=0.027) in PM and to the levels of creatine phosphokinase (r=0.432, p=0.028) in CAM patients. CONCLUSIONS: We show for a first time a potential implication of S100A11 in the local inflammatory and tissue remodelling processes in myositis and an association of circulating S100A11 with disease activity and extra muscular manifestations in DM.
- MeSH
- Autoimmune Diseases immunology pathology MeSH
- Autoantibodies immunology MeSH
- C-Reactive Protein analysis MeSH
- Adult MeSH
- Muscle Fibers, Skeletal * pathology MeSH
- Middle Aged MeSH
- Humans MeSH
- Polymyositis * immunology pathology MeSH
- S100 Proteins * metabolism MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Female MeSH
BACKGROUND: S100A11 (calgizzarin), a member of the S100 family, is associated with oncogenesis, inflammation and myocardial damage. Our aim was to analyse S100A11 in idiopathic inflammatory myopathies (IIMs) and its association with disease activity features and cancer development. METHODS: S100A11 in muscle was determined by immunohistochemistry in polymyositis (PM), dermatomyositis (DM), myasthenia gravis (MG) and in subjects without autoimmune inflammatory disease (HC). S100A11 in plasma was measured in 110 patients with IIMs (PM, DM, and cancer associated myositis (CAM) patients) and in 42 HC. Disease activity was assessed by myositis disease activity assessment (MYOACT), muscle enzymes and C-reactive protein (CRP) were measured by routine laboratory techniques; autoantibodies by immunoprecipitation or by immunoblot. RESULTS: We observed an accumulation of S100A11 in the cytoplasm of regenerating and necrotizing muscle fibres of PM and DM patients. S100A11 was increased in plasma of all myositis patients compared to HC (3.8 (1.5-16.8) vs 2.8 (1.7-11.2) ng/ml, p = 0.011) and in DM and CAM patients compared to HC (4.0 (2.2-14.9) and 4.5 (1.5-9.1) vs 2.8 (1.7-11.2) ng/ml, p < 0.001 and p = 0.022, respectively). In all myositis patients, S100A11 correlated with the levels of lactate dehydrogenase (r = 0.256, p = 0.011), aspartate aminotransferase (AST) (r = 0.312, p = 0.002), CRP (r = 0.254, p = 0.022) and MYOACT (r = 0.245, p = 0.022). S100A11 was associated with MYOACT (r = 0.377, p = 0.030) and pulmonary and cutaneous disease activity in DM patients (r = 0.408, p = 0.017 and r = 0.417, p = 0.01, respectively). S100A11 was related to the levels of AST (r = 0.412, p = 0.027) in PM and to the levels of creatine phosphokinase (r = 0.432, p = 0.028) in CAM patients. CONCLUSIONS: We show for a first time a potential implication of S100A11 in the local inflammatory and tissue remodelling processes in myositis and an association of circulating S100A11 with disease activity and extra muscular manifestations in DM.
- MeSH
- Autoimmune Diseases immunology pathology MeSH
- Autoantibodies immunology MeSH
- C-Reactive Protein analysis MeSH
- Adult MeSH
- Muscle Fibers, Skeletal pathology MeSH
- Middle Aged MeSH
- Humans MeSH
- Polymyositis immunology pathology MeSH
- S100 Proteins metabolism MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
AIMS: The EuroMyositis Registry facilitates collaboration across the idiopathic inflammatory myopathy (IIM) research community. This inaugural report examines pooled Registry data. METHODS: Cross-sectional analysis of IIM cases from 11 countries was performed. Associations between clinical subtypes, extramuscular involvement, environmental exposures and medications were investigated. RESULTS: Of 3067 IIM cases, 69% were female. The most common IIM subtype was dermatomyositis (DM) (31%). Smoking was more frequent in connective tissue disease overlap cases (45%, OR 1.44, 95% CI 1.09 to 1.90, p=0.012). Smoking was associated with interstitial lung disease (ILD) (OR 1.32, 95% CI 1.06 to 1.65, p=0.013), dysphagia (OR 1.43, 95% CI 1.16 to 1.77, p=0.001), malignancy ever (OR 1.78, 95% CI 1.36 to 2.33, p<0.001) and cardiac involvement (OR 2.40, 95% CI 1.60 to 3.60, p<0.001).Dysphagia occurred in 39% and cardiac involvement in 9%; either occurrence was associated with higher Health Assessment Questionnaire (HAQ) scores (adjusted OR 1.79, 95% CI 1.43 to 2.23, p<0.001). HAQ scores were also higher in inclusion body myositis cases (adjusted OR 3.85, 95% CI 2.52 to 5.90, p<0.001). Malignancy (ever) occurred in 13%, most commonly in DM (20%, OR 2.06, 95% CI 1.65 to 2.57, p<0.001).ILD occurred in 30%, most frequently in antisynthetase syndrome (71%, OR 10.7, 95% CI 8.6 to 13.4, p<0.001). Rash characteristics differed between adult-onset and juvenile-onset DM cases ('V' sign: 56% DM vs 16% juvenile-DM, OR 0.16, 95% CI 0.07 to 0.36, p<0.001). Glucocorticoids were used in 98% of cases, methotrexate in 71% and azathioprine in 51%. CONCLUSION: This large multicentre cohort demonstrates the importance of extramuscular involvement in patients with IIM, its association with smoking and its influence on disease severity. Our findings emphasise that IIM is a multisystem inflammatory disease and will help inform prognosis and clinical management of patients.
- MeSH
- Biomedical Research methods MeSH
- Cohort Studies MeSH
- Smoking adverse effects MeSH
- Humans MeSH
- International Cooperation * MeSH
- Myositis epidemiology etiology pathology MeSH
- Prognosis MeSH
- Cross-Sectional Studies MeSH
- Surveys and Questionnaires MeSH
- Registries statistics & numerical data MeSH
- Severity of Illness Index MeSH
- Health Status MeSH
- Check Tag
- Humans MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Multicenter Study MeSH
To develop response criteria for adult dermatomyositis (DM) and polymyositis (PM). Expert surveys, logistic regression, and conjoint analysis were used to develop 287 definitions using core set measures. Myositis experts rated greater improvement among multiple pairwise scenarios in conjoint analysis surveys, where different levels of improvement in 2 core set measures were presented. The PAPRIKA (Potentially All Pairwise Rankings of All Possible Alternatives) method determined the relative weights of core set measures and conjoint analysis definitions. The performance characteristics of the definitions were evaluated on patient profiles using expert consensus (gold standard) and were validated using data from a clinical trial. The nominal group technique was used to reach consensus. Consensus was reached for a conjoint analysis-based continuous model using absolute per cent change in core set measures (physician, patient, and extramuscular global activity, muscle strength, Health Assessment Questionnaire, and muscle enzyme levels). A total improvement score (range 0-100), determined by summing scores for each core set measure, was based on improvement in and relative weight of each core set measure. Thresholds for minimal, moderate, and major improvement were ≥20, ≥40, and ≥60 points in the total improvement score. The same criteria were chosen for juvenile DM, with different improvement thresholds. Sensitivity and specificity in DM/PM patient cohorts were 85% and 92%, 90% and 96%, and 92% and 98% for minimal, moderate, and major improvement, respectively. Definitions were validated in the clinical trial analysis for differentiating the physician rating of improvement (p<0.001). The response criteria for adult DM/PM consisted of the conjoint analysis model based on absolute per cent change in 6 core set measures, with thresholds for minimal, moderate, and major improvement.
- MeSH
- Dermatomyositis therapy MeSH
- Child MeSH
- Adult MeSH
- Outcome Assessment, Health Care standards MeSH
- Consensus MeSH
- Humans MeSH
- Adolescent MeSH
- Polymyositis therapy MeSH
- Child, Preschool MeSH
- Randomized Controlled Trials as Topic MeSH
- Sensitivity and Specificity MeSH
- Severity of Illness Index * MeSH
- Check Tag
- Child MeSH
- Adult MeSH
- Humans MeSH
- Adolescent MeSH
- Child, Preschool MeSH
- Publication type
- Journal Article MeSH
- Consensus Development Conference MeSH
- Practice Guideline MeSH
- Validation Study MeSH
