tetano
Editor, Senior Moderator
Clinics (Sao Paulo)
. 2021 Dec 6;76:e3503.
doi: 10.6061/clinics/2021/e3503. eCollection 2021.
Lung Lesion Burden found on Chest CT as a Prognostic Marker in Hospitalized Patients with High Clinical Suspicion of COVID-19 Pneumonia: a Brazilian experience
Eduardo Kaiser Ururahy Nunes Fonseca[SUP] 1 [/SUP], Antonildes Nascimento Assunção Júnior[SUP] 1 [/SUP], Jose de Arimateia Batista Araujo-Filho[SUP] 1 [/SUP], Lorena Carneiro Ferreira[SUP] 1 [/SUP], Bruna Melo Coelho Loureiro[SUP] 1 [/SUP], Daniel Giunchetti Strabelli[SUP] 1 [/SUP], Lucas de Pádua Gomes de Farias[SUP] 1 [/SUP], Rodrigo Caruso Chate[SUP] 1 [/SUP], Giovanni Guido Cerri[SUP] 1 [/SUP], Marcio Valente Yamada Sawamura, Cesar Higa Nomura[SUP] 1 [/SUP]
Affiliations
Abstract
Objective: To investigate the relationship between lung lesion burden (LLB) found on chest computed tomography (CT) and 30-day mortality in hospitalized patients with high clinical suspicion of coronavirus disease 2019 (COVID-19), accounting for tomographic dynamic changes.
Methods: Patients hospitalized with high clinical suspicion of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in a dedicated and reference hospital for COVID-19, having undergone at least one RT-PCR test, regardless of the result, and with one CT compatible with COVID-19, were retrospectively studied. Clinical and laboratory data upon admission were assessed, and LLB found on CT was semi-quantitatively evaluated through visual analysis. The primary outcome was 30-day mortality after admission. Secondary outcomes, including the intensive care unit (ICU) admission, mechanical ventilation used, and length of stay (LOS), were assessed.
Results: A total of 457 patients with a mean age of 57±15 years were included. Among these, 58% presented with positive RT-PCR result for COVID-19. The median time from symptom onset to RT-PCR was 8 days [interquartile range 6-11 days]. An initial LLB of ≥50% using CT was found in 201 patients (44%), which was associated with an increased crude at 30-day mortality (31% vs. 15% in patients with LLB of <50%, p<0.001). An LLB of ≥50% was also associated with an increase in the ICU admission, the need for mechanical ventilation, and a prolonged LOS after adjusting for baseline covariates and accounting for the CT findings as a time-varying covariate; hence, patients with an LLB of ≥50% remained at a higher risk at 30-day mortality (adjusted hazard ratio 2.17, 95% confidence interval 1.47-3.18, p<0.001).
Conclusion: Even after accounting for dynamic CT changes in patients with both clinical and imaging findings consistent with COVID-19, an LLB of ≥50% might be associated with a higher risk of mortality.
. 2021 Dec 6;76:e3503.
doi: 10.6061/clinics/2021/e3503. eCollection 2021.
Lung Lesion Burden found on Chest CT as a Prognostic Marker in Hospitalized Patients with High Clinical Suspicion of COVID-19 Pneumonia: a Brazilian experience
Eduardo Kaiser Ururahy Nunes Fonseca[SUP] 1 [/SUP], Antonildes Nascimento Assunção Júnior[SUP] 1 [/SUP], Jose de Arimateia Batista Araujo-Filho[SUP] 1 [/SUP], Lorena Carneiro Ferreira[SUP] 1 [/SUP], Bruna Melo Coelho Loureiro[SUP] 1 [/SUP], Daniel Giunchetti Strabelli[SUP] 1 [/SUP], Lucas de Pádua Gomes de Farias[SUP] 1 [/SUP], Rodrigo Caruso Chate[SUP] 1 [/SUP], Giovanni Guido Cerri[SUP] 1 [/SUP], Marcio Valente Yamada Sawamura, Cesar Higa Nomura[SUP] 1 [/SUP]
Affiliations
- PMID: 34878032
- DOI: 10.6061/clinics/2021/e3503
Abstract
Objective: To investigate the relationship between lung lesion burden (LLB) found on chest computed tomography (CT) and 30-day mortality in hospitalized patients with high clinical suspicion of coronavirus disease 2019 (COVID-19), accounting for tomographic dynamic changes.
Methods: Patients hospitalized with high clinical suspicion of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in a dedicated and reference hospital for COVID-19, having undergone at least one RT-PCR test, regardless of the result, and with one CT compatible with COVID-19, were retrospectively studied. Clinical and laboratory data upon admission were assessed, and LLB found on CT was semi-quantitatively evaluated through visual analysis. The primary outcome was 30-day mortality after admission. Secondary outcomes, including the intensive care unit (ICU) admission, mechanical ventilation used, and length of stay (LOS), were assessed.
Results: A total of 457 patients with a mean age of 57±15 years were included. Among these, 58% presented with positive RT-PCR result for COVID-19. The median time from symptom onset to RT-PCR was 8 days [interquartile range 6-11 days]. An initial LLB of ≥50% using CT was found in 201 patients (44%), which was associated with an increased crude at 30-day mortality (31% vs. 15% in patients with LLB of <50%, p<0.001). An LLB of ≥50% was also associated with an increase in the ICU admission, the need for mechanical ventilation, and a prolonged LOS after adjusting for baseline covariates and accounting for the CT findings as a time-varying covariate; hence, patients with an LLB of ≥50% remained at a higher risk at 30-day mortality (adjusted hazard ratio 2.17, 95% confidence interval 1.47-3.18, p<0.001).
Conclusion: Even after accounting for dynamic CT changes in patients with both clinical and imaging findings consistent with COVID-19, an LLB of ≥50% might be associated with a higher risk of mortality.