Pattern of Nonmotor Symptoms in Patients with Idiopathic Parkinson's Disease in a Tertiary Care Hospital of Rural Eastern India

Idiopathic Parkinson's disease (IPD) is associated with a spectrum of nonmotor symptoms (NMS) that contribute as much to the burden of the disease as the more obvious motor abnormalities. There is a paucity of literature determining the association between NMS and the severity of IPD, especially in rural eastern parts of India.

This study explores the frequency of NMS in patients with IPD and determines the association between NMS and the severity of IPD.

A cross-sectional observational study involving 65 serially enrolled IPD patients (diagnosed as per United Kingdom Parkinson's Disease Society Brain Bank Clinical Diagnostic Criteria) was conducted over a period of 18 months. The patients were evaluated for disease severity as per the Hoehn and Yahr scale (original) and were subsequently evaluated with a predesigned and validated Parkinson's Disease Non-Motor Symptoms Questionnaire. Pearson's Chi-squared test for independence of attributes or Fisher's exact test was used for comparison of categorical variables across the groups. Continuous variables were compared using a one-way analysis of variance (ANOVA) test.

The most common presenting NMS of IPD was low mood (n = 61; 93.85%), followed by apathy (n = 59; 90.77%), impaired concentration (n = 58; 89.23%), restless leg (n = 54; 83.08%), and tenesmus (n = 54; 83.08%). A majority of the neuropsychiatric symptoms, autonomic dysfunctions, sleep abnormalities, gastrointestinal manifestations, and sensory abnormalities individually showed a statistically significant relation with the severity of IPD.

Common presenting NMS include neuropsychiatric manifestations, autonomic symptoms, sleep-related symptoms, and gastrointestinal manifestations. Most of the NMS are significantly related to disease severity.