Figure 2: A. Univariate logistic regression showing the probability to mimic in relation to misophonia severity score. B. Odds Ratio (OR) with 95 % confidence limits for different trigger sound categories.
To identify patterns of relationship between mimicry and different sound categories, we performed principal component analysis on 8 variables: mimicry and the severity score on 7 sound categories. The PCA revealed two components which explained 56.6% of the variance. Loadings of the two components are shown in Figure 3. Notably, orofacial related trigger sounds such as, eating, nasal, and throat sounds loaded significantly onto the second component whereas environmental and non-orofacial sounds, such as repetitive tapping and rustling, loaded significantly onto the first component. Importantly, ‘mimicry’, loaded onto the same component as orofacial sounds thus highlighting that mimicry and distress for orofacial sounds are more strongly associated with one another in relation to misophonia, compared to other types of trigger sounds.