Clinical data was collected via phone calls within 6 to 24 hours following ICU admission. Data was collected through March 18, 2020.

University of Michigan - Ann Arbor

Grasselli G, Zangrillo A, Zanella A, Antonelli M, Cabrini L, Castelli A, et al. (2020). Baseline Characteristics and Outcomes of 1591 Patients Infected With SARS-CoV-2 Admitted to ICUs of the Lombardy Region, Italy. JAMA.
https://doi.org/10.1001/jama.2020.5394

https://jamanetwork.com/journals/jama/fullarticle/2764365

Baseline Characteristics and Outcomes of 1591 Patients Infected With SARS-CoV-2 Admitted to ICUs of the Lombardy Region, Italy

Retrospective observational study design
Positive SARS-Cov-2 result defined as a positive real-time transcriptase-polymerase chain reaction assay of nasal and pharyngeal swabs


Study Design of "Baseline Characteristics and Outcomes of 1591 Patients Infected With SARS-CoV-2 Admitted to ICUs of the Lombardy Region, Italy"

Patients were grouped by ages: 0-20 years, 21-40 years, 41-50 years, 51-60 years, 61-70 years, 71-80 years, 81-90 years, and 91-100 years.
Mann-Whitney rank sum test was used to compare nonparametric continuous variables between patients with or without hypertension and median age subgroups.
Chi-square or Fisher exact tests were used for categorical variables. 
Statistical tests were 2-tailed, with significance deemed as a p value of < 0.05.
Anaysis was not adjusted.

Statistical Analysis of "Baseline Characteristics and Outcomes of 1591 Patients Infected With SARS-CoV-2 Admitted to ICUs of the Lombardy Region, Italy"

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