RT Journal Article T1 Lung ultrasound for the early diagnosis of COVID-19 pneumonia: an international multicenter study. A1 Volpicelli, Giovanni A1 Gargani, Luna A1 Perlini, Stefano A1 Spinelli, Stefano A1 Barbieri, Greta A1 Lanotte, Antonella A1 Casasola, Gonzalo García A1 Nogué-Bou, Ramon A1 Lamorte, Alessandro A1 Agricola, Eustachio A1 Villén, Tomas A1 Deol, Paramjeet Singh A1 Nazerian, Peiman A1 Corradi, Francesco A1 Stefanone, Valerio A1 Fraga, Denise Nicole A1 Navalesi, Paolo A1 Ferre, Robinson A1 Boero, Enrico A1 Martinelli, Giampaolo A1 Cristoni, Lorenzo A1 Perani, Cristiano A1 Vetrugno, Luigi A1 McDermott, Cian A1 Miralles-Aguiar, Francisco A1 Secco, Gianmarco A1 Zattera, Caterina A1 Salinaro, Francesco A1 Grignaschi, Alice A1 Boccatonda, Andrea A1 Giostra, Fabrizio A1 Infante, Marta Nogué A1 Covella, Michele A1 Ingallina, Giacomo A1 Burkert, Julia A1 Frumento, Paolo A1 Forfori, Francesco A1 Ghiadoni, Lorenzo A1 on behalf of the International Multicenter Study Group on LUS in COVID-19, K1 COVID-19 K1 Interstitial pneumonia K1 Lung ultrasound K1 SARS-CoV-2 AB To analyze the application of a lung ultrasound (LUS)-based diagnostic approach to patients suspected of COVID-19, combining the LUS likelihood of COVID-19 pneumonia with patient's symptoms and clinical history. This is an international multicenter observational study in 20 US and European hospitals. Patients suspected of COVID-19 were tested with reverse transcription-polymerase chain reaction (RT-PCR) swab test and had an LUS examination. We identified three clinical phenotypes based on pre-existing chronic diseases (mixed phenotype), and on the presence (severe phenotype) or absence (mild phenotype) of signs and/or symptoms of respiratory failure at presentation. We defined the LUS likelihood of COVID-19 pneumonia according to four different patterns: high (HighLUS), intermediate (IntLUS), alternative (AltLUS), and low (LowLUS) probability. The combination of patterns and phenotypes with RT-PCR results was described and analyzed. We studied 1462 patients, classified in mild (n = 400), severe (n = 727), and mixed (n = 335) phenotypes. HighLUS and IntLUS showed an overall sensitivity of 90.2% (95% CI 88.23-91.97%) in identifying patients with positive RT-PCR, with higher values in the mixed (94.7%) and severe phenotype (97.1%), and even higher in those patients with objective respiratory failure (99.3%). The HighLUS showed a specificity of 88.8% (CI 85.55-91.65%) that was higher in the mild phenotype (94.4%; CI 90.0-97.0%). At multivariate analysis, the HighLUS was a strong independent predictor of RT-PCR positivity (odds ratio 4.2, confidence interval 2.6-6.7, p  Combining LUS patterns of probability with clinical phenotypes at presentation can rapidly identify those patients with or without COVID-19 pneumonia at bedside. This approach could support and expedite patients' management during a pandemic surge. YR 2021 FD 2021-03-20 LK http://hdl.handle.net/10668/17373 UL http://hdl.handle.net/10668/17373 LA en DS RISalud RD Apr 7, 2025