Ray Dorsey E

Although numerous studies have concentrated on PD, there is a notable scarcity of investigations that delve into step counts of PD patients over extended periods. This limitation is primarily due to the large volume of daily data records required, making continuous follow-up challenging. Even in the extensive PPMI study, the number of participants in the healthy control group followed for up to two years remains limited compared to the PD groups, leading to imbalanced data between the two groups.