Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Division of Physiotherapy, 141 83 Huddinge, Sweden
Comparison of Pedometer and Accelerometer Derived Steps in Elderly Individuals With Parkinson’s Disease or Osteoporosis Under Free-Living Conditions.
- Published on Dec. 4, 2013
Aim To compare self-reported pedometer steps with accelerometer steps under free-living conditions in individuals with Parkinson’s disease (PD) or osteoporosis (OP).
Methods Seventy-three individuals with PD and 71 individuals with OP wore a pedometer (Yamax LS2000) and an accelerometer (Actigraph GT1M/GT3X+) simultaneously for one week.
Results Fifty-one individuals with PD (72.6 ± 5.3 years) and 61 with OP (75.6 ± 5.3 years) provided simultaneously recorded data for 3–7 consecutive days. Pedometer steps were significantly lower than accelerometer steps in the PD-group (p = .002) but not in the OP-group (p = .956). Bland-Altman plots demonstrated wide limits of agreement between the instruments in both PD (range = 6,911 steps) and OP (range = 6,794 steps).
Conclusion These results suggest that the Actigraph GT1M/GT3X+ should be preferred over the Yamax LS2000 for the assessment of steps in both research and clinical evaluations, particularly in individuals with PD and/or altered gait.
- Martin Benka Wallén 1
- Ing-Mari Dohrn 1
- Agneta Ståhle 1, 2
- Erika Franzén 1, 2
- Maria Hagströmer 1
Karolinska University Hospital, Department of Physical Therapy, Stockholm, Sweden
Journal of Aging and Physical Activity