. 2022 Feb 24;148(4):307–315. doi: 10.1001/jamaoto.2021.4414

Table 2. Sensitivity Analysis for Incidence Estimates of Sudden Sensorineural Hearing Loss After COVID-19 Vaccination.

Source	Incidence
Source	Minimum^a	Maximum^b
Cases	555	2170
Population size	185 424 899^{^c}	92 712 450^{^d}
VAERS underreporting bias, %	0	50
Incidence^{^e}	0.6	28.0

Abbreviations: SSNHL, sudden sensorineural hearing loss; VAERS, Vaccine Adverse Events Reporting System.

^{^a}

Estimates of minimum incidence were based on the 555 cases deemed to be probable SSNHL, a population size that included 1 vaccine dose per person, and the assumption that all cases were reported to VAERS.

^{^b}

Estimates of maximum incidence (the most inclusive estimates) were based on all 2170 reports of SSNHL reported to VAERS using search terms described in the Methods section, a population size that included 2 vaccine doses per person (ie, 2 opportunities to experience a COVID-19 vaccination–associated SSNHL), and the assumption that only 50% of cases were reported to VAERS.

^{^c}

One dose per person.

^{^d}

Two doses per person.

^{^e}

Per 100 000 people per year.