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Accuracy of consumer-based activity trackers to measure and coach patients with lower limb lymphoedema

Astrid Blondeel, Nele Devoogdt, Anne Asnong, Inge Geraerts, An De Groef, An-Kathleen Heroes, Charlotte Van Calster, Thierry Troosters, Heleen Demeyer (UGent) , Pieter Ginis, et al.
(2024) PLOS ONE. 19(7).
Author
Organization
Abstract
Purpose This study investigated the accuracy of activity trackers in chronic lower limb lymphoedema (LLL) patients and in comparison to matched controls.Materials and methods Seventeen LLL patients and 35 healthy subjects wore an activity tracker at the hip (Fitbit Zip/Inspire; hip-AT) and one at the wrist (Fitbit Alta/Inspire; wrist-AT) combined with a reference activity monitor (Dynaport Movemonitor; DAM), for 14 consecutive days. To analyze accuracy and agreement, mean daily step count from both AT's were compared to DAM. To evaluate the accuracy as coaching tool, day-by-day differences were calculated. The Kendall correlation coefficient was used to test consistency of ranking daily steps between the AT's and the DAM.Results The wrist-AT significantly overestimated daily step count compared to DAM in the LLL group (+1221 +/- 1754 steps per day, p = 0.011) while the hip-AT underestimated the step count, although not significantly. Similar results were found in the healthy control group. As a coaching tool, both wrist-AT and hip-AT showed a moderate correlation with the DAM (r = 0.507 and 0.622, respectively) in the LLL group regarding consistency of ranking from most to least active days.Conclusion Wrist-AT's significantly overestimate daily step count in a LLL population. As a coaching tool, both trackers show moderate validity, indicating applicability to improve physical activity.
Keywords
PHYSICAL-ACTIVITY, ACTIVITY MONITORS, WALKING, RELIABILITY, INTERVENTIONS, DISABILITY, PEDOMETERS, VALIDITY, HEALTH, ADULTS

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MLA
Blondeel, Astrid, et al. “Accuracy of Consumer-Based Activity Trackers to Measure and Coach Patients with Lower Limb Lymphoedema.” PLOS ONE, vol. 19, no. 7, 2024, doi:10.1371/journal.pone.0305768.
APA
Blondeel, A., Devoogdt, N., Asnong, A., Geraerts, I., De Groef, A., Heroes, A.-K., … De Vrieze, T. (2024). Accuracy of consumer-based activity trackers to measure and coach patients with lower limb lymphoedema. PLOS ONE, 19(7). https://doi.org/10.1371/journal.pone.0305768
Chicago author-date
Blondeel, Astrid, Nele Devoogdt, Anne Asnong, Inge Geraerts, An De Groef, An-Kathleen Heroes, Charlotte Van Calster, et al. 2024. “Accuracy of Consumer-Based Activity Trackers to Measure and Coach Patients with Lower Limb Lymphoedema.” PLOS ONE 19 (7). https://doi.org/10.1371/journal.pone.0305768.
Chicago author-date (all authors)
Blondeel, Astrid, Nele Devoogdt, Anne Asnong, Inge Geraerts, An De Groef, An-Kathleen Heroes, Charlotte Van Calster, Thierry Troosters, Heleen Demeyer, Pieter Ginis, and Tessa De Vrieze. 2024. “Accuracy of Consumer-Based Activity Trackers to Measure and Coach Patients with Lower Limb Lymphoedema.” PLOS ONE 19 (7). doi:10.1371/journal.pone.0305768.
Vancouver
1.
Blondeel A, Devoogdt N, Asnong A, Geraerts I, De Groef A, Heroes A-K, et al. Accuracy of consumer-based activity trackers to measure and coach patients with lower limb lymphoedema. PLOS ONE. 2024;19(7).
IEEE
[1]
A. Blondeel et al., “Accuracy of consumer-based activity trackers to measure and coach patients with lower limb lymphoedema,” PLOS ONE, vol. 19, no. 7, 2024.
@article{01JEV7X3M3TYBR38NVZRMFJK4Z,
  abstract     = {{Purpose This study investigated the accuracy of activity trackers in chronic lower limb lymphoedema (LLL) patients and in comparison to matched controls.Materials and methods Seventeen LLL patients and 35 healthy subjects wore an activity tracker at the hip (Fitbit Zip/Inspire; hip-AT) and one at the wrist (Fitbit Alta/Inspire; wrist-AT) combined with a reference activity monitor (Dynaport Movemonitor; DAM), for 14 consecutive days. To analyze accuracy and agreement, mean daily step count from both AT's were compared to DAM. To evaluate the accuracy as coaching tool, day-by-day differences were calculated. The Kendall correlation coefficient was used to test consistency of ranking daily steps between the AT's and the DAM.Results The wrist-AT significantly overestimated daily step count compared to DAM in the LLL group (+1221 +/- 1754 steps per day, p = 0.011) while the hip-AT underestimated the step count, although not significantly. Similar results were found in the healthy control group. As a coaching tool, both wrist-AT and hip-AT showed a moderate correlation with the DAM (r = 0.507 and 0.622, respectively) in the LLL group regarding consistency of ranking from most to least active days.Conclusion Wrist-AT's significantly overestimate daily step count in a LLL population. As a coaching tool, both trackers show moderate validity, indicating applicability to improve physical activity.}},
  articleno    = {{e0305768}},
  author       = {{Blondeel, Astrid and Devoogdt, Nele and Asnong, Anne and Geraerts, Inge and De Groef, An and Heroes, An-Kathleen and Van Calster, Charlotte and Troosters, Thierry and Demeyer, Heleen and Ginis, Pieter and De Vrieze, Tessa}},
  issn         = {{1932-6203}},
  journal      = {{PLOS ONE}},
  keywords     = {{PHYSICAL-ACTIVITY,ACTIVITY MONITORS,WALKING,RELIABILITY,INTERVENTIONS,DISABILITY,PEDOMETERS,VALIDITY,HEALTH,ADULTS}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{15}},
  title        = {{Accuracy of consumer-based activity trackers to measure and coach patients with lower limb lymphoedema}},
  url          = {{http://doi.org/10.1371/journal.pone.0305768}},
  volume       = {{19}},
  year         = {{2024}},
}
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