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.