Petrilli (2020)
Factors associated with hospital admission and critical illness among 5279 people with coronavirus disease 2019 in New York City: prospective cohort study
Laboratory Findings
Lymphocyte count (<0.5 vs. >1.2)
COVID-19 (severe/critical)
Odds ratio: 1.760 (1.260-2.500) Adjusted model

United States of America

Prospective cohort study

Medical records


5279 patients with laboratory confirmed severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) infection between 1 March 2020 and 8 April 2020

The median age of the study population that tested positive for covid-19 was 54 years (interquartile range 38-66 years), and 2615 (49.5%) were men. A total of 1195 (22.6%) had diabetes, 1865 (35.3%) were obese (BMI ?30), and 2752 (52.1%) had any form of cardiovascular disease. 2741 (51.9%) required admission to hospital, 990/2741 (36.1%) experienced critical illness,


7 Day

COVID-19 (severe/critical)


critical illness

Laboratory Findings

Lymphocyte count

First lymphocyte count (103/uL; SI 109/L)



Odds ratio

1.760 (1.260-2.500)




Admission date, age, gender, race, smoking, BMI, Coronary artery disease, Heart failure, Hyperlipidemia, Hypertension, Diabetes, Asthma or chronic obstructive pulmonary disease, Chronic kidney disease, Cancer, Temperature on presentation, Oxygen saturation on presentation, First lymphocyte count, First creatinine, First C reactive protein, First D-dimer, First ferritin, First procalcitonin, First troponin