Abstract: Altogether 944 cases of Parkinson disease patients were investigated about their experien ce of treatment, and the reasons of misdiagnosis were summed up. Of the 944 cases, 35.1% of them wer e diagnosed within half a year, 26.3% patients were diagnosed between 0.5 to 1 year, 17.6% patients were diagnosed between 1.0 to 2.0 year, 8.5% patients were diagnosed between 2.0 to 3.0 year, while 12.5% patients were diagnosed after 3 years. Some patients were thought to be young-onset Parkinson disease (YOPD) if the illness onset before 40 year old, while other patients were thought to be re gular PD if the illness onset after 40 year old. In the tremor patients, the diagnosis time of YOPD was (1.7± 1.9) years, while the regular one was (1.4 ±1.7) years, the difference was not significant; In the rigidity type patients, the diagnosis time of YOPD was (2.6±2.4) years, while the regular PD was (1.6 ± 1.8) years, the difference was significant. The former's time of diagnosis i s longer than the later's.

Key words: Parkinson disease, clinical type, diagnosis, misdiagnosis