The chart below shows the results of a survey of 194 people with misophonia who were contacted through the online misophonia groups and websites. While the most common age for onset of misophonia is shown in the pre-teen (late childhood) years, the chart also reveals that the severity increases a few years later.
Several research studies have reproduced the same results: that misophonia most commonly develops between ages 8–13. Studies also show that misophonia can begin at any age, indicating that it is not simply related to maturation.
Misophonia Onset and Severity