Intra- and Inter-Session Reliability of Methods for Measuring Reaction Time in Participants with and without Patellofemoral Pain Syndrome

Document Type : RESEARCH PAPER

Authors

1 Department of Physiotherapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran

2 Orthopedic Research Center, Shahid Kamyab Hospital, Mashhad University of Medical Sciences, Mashhad, Iran

3 Orthopedic Research Center, Mashhad University of Medical Sciences, Mashhad, Iran

Abstract

Background: To evaluate the relative and absolute reliability of reaction time measuring methods during different
conditions in participants with and without patellofemoral pain syndrome (PFPS).
Methods: 30 patients with PFPS and 30 healthy controls were recruited in the present study. The upper extremity
reaction time, upper extremity error rate, involved and non-involved lower extremity braking reaction times, and involved
and non-involved knee extension reaction times were measured. Each condition was repeated three times, 2 sessions
with a 5-7 days interval. The intra-session reliability was evaluated in three-trial (A), second- and third-trial (B) modes.
In addition, the inter-session reliability was evaluated in mode A, mode B, and best score (C) mode.
Results: The result of inter-session reliability of mode A showed that all measurements except upper extremity reaction
time in PFPS group showed high to very high relative reliability (ICC: 0.74-0.94). In mode B, all measurements except
non-involved knee extension reaction time in PFPS group showed high to very high relative reliability (ICC: 0.71-0.93).
In mode C, all measurements showed high to very high relative reliability (ICC: 0.70-0.94) except upper extremity error
rate and non-involved knee extension reaction time in PFPS group. The result of intra-session reliability showed that
all measurements had high to very high relative reliability (ICC: 0.78-0.94) in mode A. In mode B, all measurements
showed high to very high relative reliability (0.78-0.94).
Conclusion: The braking time seems more reliable than other reaction time tasks. In addition, the results showed
that mode A is more reliable than other modes. The newly designed package is a reliable tool to measure the knee
extension reaction time in patients with knee musculoskeletal disorders.
Level of evidence: II

Keywords

References

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The Archives of Bone and Joint Surgery
Volume 9, Issue 1
January 2021
Pages 102-109

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History

  • Receive Date: 05 February 2020
  • Revise Date: 21 August 2020
  • Accept Date: 26 August 2020

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