OBJECTIVE
To evaluate abdominal pain in patients with Parkinson’s disease (PD) and its relationship with motor and non-motor symptoms of disease.
MATERIAL AND METHODS
We analyzed 118 patients with PD Hoehn-Yahr grade 1—3 using the following scales: the Unified Parkinson’s Disease Rating Scale (UPDRS), the Schwab and England Activities of Daily Living Scale (Sch&En), the Parkinson’s Disease Quality of Life Questionnaire-39 (PDQ-39), the Gastrointestinal Symptom Rating Scale (GSRS) including abdominal pain domain, the Glasgow Dyspepsia Severity Score (GDSS), the Mini-Mental State Examination (MMSE), the Beck Depression Inventory (BDI), the Spielberg’s State-Trait Anxiety Inventory (STAI-S and STAI-T), the Parkinson’s Disease Fatigue Scale (PFS-16), the Non-Motor Symptoms Questionnaire (NMSQ), the American Urological Association Symptom Score (AUA) and Body Mass Index (BMI).
RESULTS
Predominate mild-to-moderate abdominal pain (mean GSRS score 2.48, σ=1.696) was found in 62 (52.5%) patients. Pain syndrome did not depend on gender, age or BMI, intake and dose of dopaminergic drugs, duration of PD. Abdominal pain was associated with H&Y stage, total UPDRS and its subscales I, II, III and some other factors (swallowing, gait, falls, postural instability, posture and orthostasis), depression, anxiety, fatigue, NMSQ score, urological symptoms and all domains of the GSRS scale. Abdominal pain was more severe in patients with reflux, dyspepsia and constipation. Abdominal pain had negative impact on daily activities and quality of life (Sch&En and PDQ-39). According to stepwise linear multiple regression (R2=0.631), the following predictors of abdominal pain were revealed: dyspepsia (GSRS score), swallowing (UPDRS score), reflux (GSRS score) and AUA score.
CONCLUSION
Mild-to-moderate abdominal pain syndrome is widespread in patients with PD stage 1-3 and significantly reduces quality of life. Abdominal pain has a complex mechanism and depends on the following factors: stage of PD, severity of postural disorders, presence and intensity of affective and autonomic disorders. According to our data, predictors of pain in PD are dyspepsia, dysphagia, reflux and urinary disorders.