Abstract:Objective To explore the factors related to dyskinesia in Parkinson's disease (PD). Methods The patients' score on the motor component and ability of daily living (Part 2 and 3) of the Unified Parkinson's Disease Rating Scale (UPDRS) and Hoehn-Yahr stage were recorded. Levodopa-induced dyskinesia (LID) was considered to be present if the patient had a score of 1 or more on item 32 of the UPDRS Part 4. Clinical data including age, gender, age at disease onset, initial clinical manifestation, duration of disease, time when Levodopa therapy was started, and current treatment were analyzed and compared between the two groups. Results Of the 410 cases with PD, 396 patients received regular treatment with Levodopa for at least 2 months, among which 105 patients developed LID by the end of the study. There were statistically significant differences in gender, age, age at onset of disease, duration of disease, duration and dose of Levodopa treatment, score on UPDRS part 3 and Hoehn-Yahr stage between the LID and non-LID groups. Multivariate logistic regression analysis showed that age, gender, age at onset of PD, duration of disease and dose of Levo-dopa were the independent risk factors of LID. Conclusions The results showed that the development of LID is more likely in young female patients with early onset of the disease, a longer duration of PD and a higher daily dose of Levodopa.