Department of Neurology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
Department of Neurology, MRC and Movement Disorder Center, Seoul National University Hospital, Parkinson Study Group, Seoul National University College of Medicine
Department of Neurology, Ewha Womans University School of Medicine and Ewha Medical Research Institute, 1071 Anyangcheon-ro, Yangcheon-gu, Seoul, Republic of Korea
Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
Correspondence to: Beomseok Jeon, MD, PhD, Department of Neurology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea. Tel.: +82 2 2072 2876; Fax: +82 2 3672 7553; E-mail: firstname.lastname@example.org.
Abstract: Background:Dyskinesia, wearing off (WO) and freezing of gait (FOG) are troublesome complications degrading quality of life in the course of Parkinson’s disease (PD). Objective:This study evaluated the gross chronological trend of 4 motor complications - peak dose dyskinesia (PDSK), diphasic dyskinesia (DDSK), WO and FOG in a large PD population with stratification by age at disease onset according to the PD duration. Methods:The motor complications of 1212 Korean PD patients were analyzed using Kaplan-Meier curves and Cox proportional hazards models. Results:PDSK and WO appeared first as motor complications and showed accelerated development around the 5 year-PD-duration, while DDSK showed a rather constant development over time and FOG developed around the 10 year-disease duration at an accelerated rate (p < 0.001). A younger age at PD onset predicted an earlier appearance of PDSK, DDSK and WO (p < 0.001), while an older age at onset (≥60 years) was a predictor for FOG (p = 0.014). Conclusion:Motor complications developed with a distinguishing inclination over the PD duration. This study provides insight into the chronological trend of motor complications in PD at a glance.