Link to the article: https://pubmed.ncbi.nlm.nih.gov/32607928/
This was a retrospective study taking place in New York City looking at 6,493 patients positive for COVID-19. They looked at specific vital signs and laboratory values and found low blood pressure, increased heart rate, low oxygen, kidney function, and increased D-dimer had increased hazard ratios. Being female, African-American, and hydroxychloroquine had decreased hazard ratios.
TL;DR Retrospective study finding older male patients with low blood pressure, increased heart rate, low oxygen, decreased kidney function, increased troponins, and increased D-dimer had a higher mortality