Cognitive function and other non-motor features in non-demented Parkinson’s disease motor subtypes

Adult Aged, 80 and over Male Posture Parkinson Disease Middle Aged Neuropsychological Tests Severity of Illness Index Antiparkinson Agents Affect Disability Evaluation 03 medical and health sciences Cognition Cross-Sectional Studies 0302 clinical medicine Quality of Life Humans Female Sleep 10. No inequality Gait Aged
DOI: 10.1007/s00702-014-1349-1 Publication Date: 2014-12-09T16:59:07Z
ABSTRACT
Among patients with Parkinson's disease (PD), a wide range of non-motor symptoms (NMS) are evident. We assessed markers of NMS and explored their behavioral correlates with the tremor-dominant (TD) and postural instability gait difficulty (PIGD) subtypes. 110 non-demented patients with PD were evaluated and stratified into the PIGD and TD subtypes and, using stricter criteria, into predominant subgroups: p-PIGD (n = 31) and p-TD (n = 32). Non-motor signs that were assessed included cognitive function (pen and paper and a computerized battery), autonomic function (NMSQest and SCOPA-AUT), mood, and sleep. Health-related quality of life was evaluated using the PDQ-39. The p-PIGD subgroup had a higher score on the NMSQest (p = 0.033) and a higher score (i.e., worse) on the PDQ-39 (p-PIGD: 26.28 ± 12.47; p-TD: 16.93 ± 12.22; p = 0.004), compared to the p-TD subgroup, while these measures did not differ in the larger PIGD and TD group. The p-PIGD subgroup used more sleep medications compared to the p-TD subgroup (1.0 ± 1.39 vs. 0.41 ± 0.94, p = 0.05, respectively). Most cognitive scores were similar in both subgroups; however, the visuospatial components of the Montreal Cognitive Assessment and the computerized catch game were significantly worse among the p-PIGD subgroup. Mild associations were found between certain non-motor symptoms, but not cognitive function, and the PIGD score. Non-demented patients from the PIGD subtype experience more non-motor symptoms and poorer quality of life compared to the TD subtype. These findings suggest that the clinical management of non-motor and motor symptoms in patients with PD may be enhanced by a personalized approach.
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