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. 2020 Jan:215:357-364.
doi: 10.1016/j.schres.2019.08.028. Epub 2019 Sep 1.

Psychotic symptoms and sensory impairment: Findings from the 2014 adult psychiatric morbidity survey

Natalie Shoham  1 , Gemma Lewis  2 , Joseph Hayes  2 , Sally McManus  3 , Reza Kiani  4 , Traolach Brugha  4 , Paul Bebbington  2 , Claudia Cooper  2
Affiliations

Psychotic symptoms and sensory impairment: Findings from the 2014 adult psychiatric morbidity survey

Natalie Shoham et al. Schizophr Res. 2020 Jan.

Abstract

Purpose: Hearing and visual impairment have been associated with psychosis. Mechanisms behind this are poorly understood. We tested whether i) self-reported hearing and visual impairments are associated with psychotic symptoms in the 2014 UK Adult Psychiatric Morbidity Survey; ii) the odds of having psychotic symptoms vary with self-perceived degree of impairments; and iii) reduced social functioning partially explains these associations.

Methods: We analysed cross-sectional data using logistic regression. Hearing and visual impairment were the exposures, and screening positive on the Psychosis Screening Questionnaire was the outcome. We used structural equation modelling to assess mediation by social functioning, measured by the Social Functioning Questionnaire.

Results: Psychotic symptoms were strongly associated with visual impairment (Adjusted Odds Ratio (AOR) 1.81, 95% Confidence Intervals (CI) 1.33 to 2.44), especially moderate visual impairment (AOR 2.75, 95% CI 1.78 to 4.24, p < .001). Psychotic symptoms were associated with a severe degree of hearing impairment (AOR 4.94, 95% CI 1.66 to 14.67, p = .004), and weakly associated with hearing impairment overall (AOR 1.50, 95% CI 1.10 to 2.04, p = .010). Social functioning accounted for approximately 50% of associations with both types of sensory impairment, but the confidence intervals around these estimates were broad.

Conclusions: Our findings suggest an association between psychosis and visual impairment, with the strongest evidence for moderate visual impairment; the findings also support a linear relationship between psychosis and degree of hearing impairment. Social functioning may mediate these relationships and be a potential target for intervention, alongside sensory correction. These should be investigated longitudinally.

Keywords: Hearing impairment; Psychotic symptoms; Social functioning; Visual impairment.

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Conflict of interest statement

Declaration of competing interest There are no conflicts of interest to declare.

Figures

Fig. 1
Fig. 1. Mediation model. Total effect = Indirect effect + direct effect
Fig. 2
Fig. 2. Missing data.
See this image and copyright information in PMC

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