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Accelerometer-derived physical activity analysis of elderly osteoarthritis patients
Sang-Yeob Lee1, Seung Chan Kim2, Jeong-An Gim3
1Department of Biomedical Research Institute, Gyeongsang National University Hospital, Jinju, South Korea.
Musculoskeletal Science & Practice
|June 23, 2023
Summary
Osteoarthritis (OA) patients show decreased moderate to vigorous physical activity (MVPA) but increased light activity. Maintaining a certain level of MVPA is crucial for OA patients, especially those with comorbidities.
Area of Science:
- Orthopedics
- Public Health
- Gerontology
Background:
- Disability in Osteoarthritis (OA) can alter physical activity (PA) levels, potentially influencing disease progression.
- Monitoring daily PA is essential for understanding the link between PA and OA progression.
Purpose of the Study:
- To investigate the relationship between PA and OA.
- Compare PA levels between individuals with and without OA using KNHANES data.
Main Methods:
- Demographic analysis to identify comorbidities in participants.
- Comparison of PA between OA and non-OA groups.
- Analysis of PA in OA patients with and without comorbidities.
- Receiver operating characteristic (ROC) curve to determine moderate to vigorous physical activity (MVPA) cut-off.
Main Results:
- OA group had higher education levels.
- OA group exhibited reduced MVPA but increased light activity.
- OA patients with comorbidities showed higher MVPA compared to those without.
- The determined MVPA cut-off point was 7.071 min/day.
Conclusions:
- Patients with OA and low activity require a specific level of physical activity.
- An MVPA cut-off point is established, considering comorbidities in OA patients.

