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. 2021 Nov 3;75(1):e749–e754. doi: 10.1093/cid/ciab926

Table 2.

Myocarditis Incidence Rates and Incidence Rate Ratios

Gender Coronavirus Disease 2019 Vaccine Registry Population Rochester Epidemiology Project Population IRRs
Incidence Rate per 100 000 Person-Years LoCI95 UpCI95 Incidence Rate per 100 000 Person-Years LoCI95 UpCI95 IRR LoCI95 UpCI95
Males 109.52 40.19 238.4 16.37 12.33 21.3 6.69 2.35 15.52
Females 13.95 3.53 77.72 9.9 6.73 14.05 1.41 0.03 8.45
All 55.35 22.25 114 13.25 10.6 16.36 4.18 1.63 8.98

Abbreviations: IRR, incidence rate ratio; LoCI95, lower limit of the 95th confidence interval; UpCI95, upper limit of the 95th confidence interval.