Is functional dependence of Duchenne muscular dystrophy patients determinant of the quality of life and burden of their caregivers?

OBJECTIVE: The relationship between functional dependence and quality of life (QOL) in Duchenne muscular dystrophy (DMD) patients and burden and QOL in caregivers is not clear. This study investigated possible relationships between functional dependence/QOL of DMD patients and QOL/burden of caregivers. METHOD: This study included 35 boys (6-17 years) and respective caregivers (above 21 years). Caregivers answered to World Health Organization Quality of Life and Zarit Burden Interview questionnaires. Patients were assessed with the Motor Function Measure and the Autoquestionnaire Qualité de vie Enfant Imagé. Spearman correlations and linear regressions were run to investigate relationships between the variables. RESULTS: The occurrence of lower QOL and higher burden among the caregivers of patients with Duchenne muscular dystrophy was evidenced. The functional dependence of patients was not considered a determinant factor. Higher caregivers' burden was related to lower caregivers' QOL and to higher patients' ages.

Visuospatial attention disturbance in Duchenne muscular dystrophy.

AIM: The cognitive deficits present in the Duchenne muscular dystrophy (DMD) are not yet well characterized. Attention, considered to be the brain mechanism responsible for the selection of sensory stimuli, could be disturbed in DMD, contributing, at least partially, to the observed global cognitive deficit. The aim of this study was to investigate attentional function in individuals with DMD. METHOD: Twenty-five males (mean age 12y; SD 2y 2mo) with DMD and 25 healthy males (mean age 12y; SD 2y) were tested in a visuospatial task (Posner computerized test). They were instructed to respond as quickly as possible to a lateralized visual target stimulus with the ipsilateral hand. Their attention was automatically orientated by a peripheral prime stimulus or, alternatively, voluntarily orientated by a central spatially informative cue. RESULTS: The main result obtained was that the attentional effect (sum of the benefit and the cost of attention) did not differ between the two groups in the case of automatic attention (p=0.846) but was much larger for individuals with DMD than for comparison individuals in the case of voluntary attention (p<0.001). INTERPRETATION: The large voluntary attentional effect exhibited by the participants with DMD seems similar to that of younger children, suggesting that the disease is associated with delayed maturation of voluntary attention mechanisms.