FRI0434 Patients with inflammatory myopathies admitted in icu are characterised by recent onset and untreated active disease as well as older age and high comorbidities
Authors: B. Michard, T. Artzner, F. Severac, M. Schenck, J.-E. Herbrecht, R. Janssen-Langenstein, O. Collange, G. Freys, J. Pottecher, J. Sibilia, T. Martin, F. Meziani, F. Schneider, A. Meyer
Journal: Annals of the Rheumatic Diseases (2018)

<h3>Background</h3> Inflammatory myopathies (IM) are life-threatening but treatable diseases. The risk factors for admission in Intensive care unit (ICU), the management and the outcome of patients with IM admitted to ICU has not yet been assessed. <h3>Objectives</h3> To assess the clinical features, risk factors and outcome of patients with IM admitted in ICU. <h3>Methods</h3> A single centre cohort of 509 patients with IM was screened for admission in ICU from 1992 to 2017. Patients admitted for trauma or for complications from elective surgery were excluded. Control patients with IM who had not been hospitalised in ICU were randomly selected from the cohort. <h3>Results</h3> Thirty-two ICU admissions were recorded in 27 IM patients during the study period (&lt;0.05% of admissions over this 25 year period). Three IM patients were admitted more than once. Characteristics and prognosis of patients in ICU Patients hospitalised in ICU had a mean age of 63 y.±15 with SAPS II score of 58±24 and LODS score of 9±5 corresponding to an intermediate severity at admission in ICU. The delay between IM diagnosis and first ICU admission was 27±43 months. It is noteworthy that 12 patients (44%) were admitted in the ICU within the first month of IM diagnosis, among whom 4 (15%) were diagnosed with IM during ICU stay. Sixteen patients (60%) were not treated at the time of their first ICU admission. In 56% of the ICU stays, patients had active disease at admission. Patients were most frequently admitted for respiratory failure (88%) but cardiac (47%), renal (47%), neurologic (47%), haematological (22%) and hepatic (15%) failures were also recorded. Infections were present in 72% of the ICU stays, with septic shock in 44%. Nine patients (33%) died in ICU and 3 others (11%) within 90 days of the last ICU discharge (vs. 15% during a 7.5±5 years period of follow-up in the control group, p&lt;0.0001). <h3>Risk factors of ICU admission</h3> The case control analysis identified 6 risk factors significantly associated with hospitalisation in the ICU, 3 of which were independently associated with hospitalisation in multivariate analysis. ICU patients had a higher age at first clinical signs of illness (62±13 years old vs. 53±13 years old, p&lt;0.05), they had a higher rate of chronic kidney failure (26% vs. 0%, p&lt;0.05) and higher incidence of arterial or venous thrombosis history (37% vs. 0%, p&lt;0.05). Other risk factors that were only identified in univariate analysis included lower BMI (22.6±4.5 vs. 25.4±6.3), a history of interstitial lung disease (48% vs. 30%) and a higher Charlson comorbidity index (4.6±2.6 vs. 3.3±2). The type of myositis was not significantly associated with admission in ICU, although no patient admitted in ICU had sIBM. It is noteworthy that cumulative number of immunomodulatory treatments in patients at the time of hospitalisation in ICU was lower than in the control group (0.5±0.7 vs. 1.9±0.8 p&lt;0.001). <h3>Conclusions</h3> IM patients admitted in ICU frequently have recent onset and untreated active IM with respiratory failure. Admission to ICU is associated with older age and a higher number of comorbidities. Mortality of IM patients in ICU is high. <h3>Disclosure of Interest</h3> None declared