Table 2

Relative risk of incident heart failure or death within 90 days of follow-up from admission to hospital for new onset myocarditis in individuals with myocarditis associated with SARS-CoV-2 mRNA vaccination, myocarditis associated with covid-19 disease, and conventional myocarditis (Nordic myocarditis cohort)

Type of myocarditisDiagnosis of heart failure (No of patients)Death from any cause (No of patients)Total No of patientsRelative risk (95% CI) of heart failureRelative risk (95% CI) of death
Vaccination2265300.56 (0.37 to 0.85)0.48 (0.21 to 1.09)
Covid-191261091.48 (0.86 to 2.54)2.35 (1.06 to 5.19)
Conventional49615666531 (reference)1 (reference)
  • CI=confidence interval.