Persistent visual perceptual disorders after stroke: Associated factors

Abstract

Introduction Visual perceptual disorders are common after stroke and often affect functional independence. Little is known about biopsychosocial variables related to these disorders. This study aimed to identify which variables best explain the persistence of visual perceptual disorders in seniors with stroke. Method Visual perception of 195 people aged 65 and over with stroke was assessed using the Motor-free Visual Perceptual Test – Vertical version, three weeks after returning home as well as three and six months later. Biopsychosocial and personal variables were also assessed three weeks after returning home. Correlation analyses were followed by bivariate linear regression analyses. Results Seventy participants still had visual perceptual disorders six months later. Many variables measured at the first test were found to be associated with visual perception at the six-month follow-up. Those best explaining the persistence of visual perceptual dysfunctions ( R2 = 49.2%) were memory (Wechsler, delayed recall) ( p < 0.001), verbal comprehension (Token Test) ( p = 0.015), stroke severity (Canadian Neurological Scale) ( p = 0.005) and sex (female) ( p = 0.02). Conclusion Among many variables, four (memory, verbal comprehension, stroke severity and sex) were most strongly associated with persistent visual perceptual disorders. Other studies are needed to better understand the role of memory and verbal comprehension in visual perceptual disorders after stroke.