Abstract:
The purposes of this cross-sectional analytical study were to determine the prevalence and factors associated with symptomatic orthostatic hypotension (OH) in Thai patients with Parkinson's disease (PD). The study was performed during May and August 2015 at Chulalongkorn Center of Excellence for Parkinsons Disease and Related Disorders, King Chulalongkorn Memorial Hospital. Sitting or supine and standing blood pressures were measured sequentially and the presence of OH symptoms in past week was evaluated from Orthostatic Hypotension Questionnaire (OHQ). Symptomatic OH was defined as systolic BP (SBP) and/or diastolic BP (DBP) fall ≥ 20 and/or ≥ 10 mmHg after standing within 3 minutes and had OHQ score > 0. Sixteen factors consisting of patient's characteristics, disease and drug related factors were analyzed for the association with symptomatic OH by multivariate logistic regression analysis. There were 100 PD patients with the average (±SD) age of 65±11.59 years, disease duration of 9±6.12 years. The prevalence of OH and symptomatic OH were 22% (95%CI: 14%-30%) and 18% (95% CI: 10%-26%), respectively. Independent factors related to symptomatic OH were age (OR, 95% CI: 1.06, 1.01-1.12), the presence of cardiovascular disorders and fall problems identified by TU-NMSQuest (OR, 95% CI: 3.37, 0.98-11.60) and hypertension (OR, 95% CI: 5.83, 1.12-30.37). Therefore, PD patients having those significant factors should be monitored for the presence of symptomatic OH.