Relative bradycardia (1st quartile) in comparison to middle-range RHR (2nd and3rd quartiles) was significantly associated with older age, higher comorbidityburden, less severe COVID-19 at admission, lower C reactive protein (CRP), higher D-dimers, reducedwhite blood cell count (WBC), and reduced platelets (p < 0.05 for all analyses). The gene discussed is CRP; the disease is COVID-19.