Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees

David Rowe, Sarah Deans, Alison Kirk, Anthony McGarry, Hayley Mitchell, Lauren Sloan, Andrew Walker

Research output: Contribution to conferencePoster

Abstract

Introduction: Valid, reliable measurement of physical behaviours in adults with limb absence is essential to accurately describe physical behaviour patterns and intervention effects. Purpose: To assess parallel forms reliability and criterion-related validity of the activPAL for measuring steps and reclining time in simulated lifestyle activities in adults with unilateral lower limb absence. Methods: 15 adults completed three circuits of simulated kitchen work, sitting, lying and purposeful walking on level ground and stairs. Three trained raters independently analysed video recorded trials for incidental stepping, purposeful stepping and reclining. Simultaneous data were obtained from two activPAL monitors placed on the sound and prosthetic side. Data were analysed using oneway intraclass correlation coefficients (ICC; parallel forms reliability), and with Pearson correlations, oneway repeated ANOVAs, and Cohen's d (criterion-related validity). Results: Parallel forms reliability (prosthetic side vs. sound side) was poor for incidental steps (ICC = .05, d = 0.41) but acceptable for all other measures (ICC = .69-.98; d = 0.02-0.17). Correlations between direct observation and activPAL ranged from r = .65-.98 (activPAL on sound side) and from r = .30-.99 (activPAL on prosthetic side). Mean differences between observed measures and activPAL measures were generally large for all stepping variables (d = 0.56-4.22); observed mean scores were systematically higher than from the activPAL. Correlations were higher for reclining time (r = .98- .99), and differences were smaller (d = 0.25-0.28), although the pattern was similar (observed scores were higher). Conclusions: activPAL data from the sound side and prosthetic side are similar for adults with unilateral lower limb absence. Validity of the activPAL in this population seems poor in simulated lifestyle activities. These results may be at least partly due to the brief sampling period or the simulated activity protocol.

Conference

ConferenceInternational Conference on Ambulatory Monitoring of Physical Activity and Movement
Abbreviated titleICAMPAM
CountryUnited States
CityMaryland
Period20/06/1723/06/17
Internet address

Fingerprint

Amputees
Prosthetics
Reproducibility of Results
Lower Extremity
Acoustic waves
Life Style
Kitchens
Stairs
Analysis of variance (ANOVA)
Walking
Analysis of Variance
Extremities
Observation
Sampling
Networks (circuits)
Population

Keywords

  • reliability
  • validity
  • amputee
  • amputation
  • measurement
  • stepping activity
  • physical activity

Cite this

Rowe, D., Deans, S., Kirk, A., McGarry, A., Mitchell, H., Sloan, L., & Walker, A. (2017). Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees. Poster session presented at International Conference on Ambulatory Monitoring of Physical Activity and Movement , Maryland, United States.
Rowe, David ; Deans, Sarah ; Kirk, Alison ; McGarry, Anthony ; Mitchell, Hayley ; Sloan, Lauren ; Walker, Andrew. / Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees. Poster session presented at International Conference on Ambulatory Monitoring of Physical Activity and Movement , Maryland, United States.1 p.
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abstract = "Introduction: Valid, reliable measurement of physical behaviours in adults with limb absence is essential to accurately describe physical behaviour patterns and intervention effects. Purpose: To assess parallel forms reliability and criterion-related validity of the activPAL for measuring steps and reclining time in simulated lifestyle activities in adults with unilateral lower limb absence. Methods: 15 adults completed three circuits of simulated kitchen work, sitting, lying and purposeful walking on level ground and stairs. Three trained raters independently analysed video recorded trials for incidental stepping, purposeful stepping and reclining. Simultaneous data were obtained from two activPAL monitors placed on the sound and prosthetic side. Data were analysed using oneway intraclass correlation coefficients (ICC; parallel forms reliability), and with Pearson correlations, oneway repeated ANOVAs, and Cohen's d (criterion-related validity). Results: Parallel forms reliability (prosthetic side vs. sound side) was poor for incidental steps (ICC = .05, d = 0.41) but acceptable for all other measures (ICC = .69-.98; d = 0.02-0.17). Correlations between direct observation and activPAL ranged from r = .65-.98 (activPAL on sound side) and from r = .30-.99 (activPAL on prosthetic side). Mean differences between observed measures and activPAL measures were generally large for all stepping variables (d = 0.56-4.22); observed mean scores were systematically higher than from the activPAL. Correlations were higher for reclining time (r = .98- .99), and differences were smaller (d = 0.25-0.28), although the pattern was similar (observed scores were higher). Conclusions: activPAL data from the sound side and prosthetic side are similar for adults with unilateral lower limb absence. Validity of the activPAL in this population seems poor in simulated lifestyle activities. These results may be at least partly due to the brief sampling period or the simulated activity protocol.",
keywords = "reliability, validity, amputee, amputation, measurement, stepping activity, physical activity",
author = "David Rowe and Sarah Deans and Alison Kirk and Anthony McGarry and Hayley Mitchell and Lauren Sloan and Andrew Walker",
year = "2017",
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day = "20",
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note = "International Conference on Ambulatory Monitoring of Physical Activity and Movement , ICAMPAM ; Conference date: 20-06-2017 Through 23-06-2017",
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Rowe, D, Deans, S, Kirk, A, McGarry, A, Mitchell, H, Sloan, L & Walker, A 2017, 'Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees' International Conference on Ambulatory Monitoring of Physical Activity and Movement , Maryland, United States, 20/06/17 - 23/06/17, .

Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees. / Rowe, David; Deans, Sarah; Kirk, Alison; McGarry, Anthony; Mitchell, Hayley; Sloan, Lauren; Walker, Andrew.

2017. Poster session presented at International Conference on Ambulatory Monitoring of Physical Activity and Movement , Maryland, United States.

Research output: Contribution to conferencePoster

TY - CONF

T1 - Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees

AU - Rowe, David

AU - Deans, Sarah

AU - Kirk, Alison

AU - McGarry, Anthony

AU - Mitchell, Hayley

AU - Sloan, Lauren

AU - Walker, Andrew

PY - 2017/6/20

Y1 - 2017/6/20

N2 - Introduction: Valid, reliable measurement of physical behaviours in adults with limb absence is essential to accurately describe physical behaviour patterns and intervention effects. Purpose: To assess parallel forms reliability and criterion-related validity of the activPAL for measuring steps and reclining time in simulated lifestyle activities in adults with unilateral lower limb absence. Methods: 15 adults completed three circuits of simulated kitchen work, sitting, lying and purposeful walking on level ground and stairs. Three trained raters independently analysed video recorded trials for incidental stepping, purposeful stepping and reclining. Simultaneous data were obtained from two activPAL monitors placed on the sound and prosthetic side. Data were analysed using oneway intraclass correlation coefficients (ICC; parallel forms reliability), and with Pearson correlations, oneway repeated ANOVAs, and Cohen's d (criterion-related validity). Results: Parallel forms reliability (prosthetic side vs. sound side) was poor for incidental steps (ICC = .05, d = 0.41) but acceptable for all other measures (ICC = .69-.98; d = 0.02-0.17). Correlations between direct observation and activPAL ranged from r = .65-.98 (activPAL on sound side) and from r = .30-.99 (activPAL on prosthetic side). Mean differences between observed measures and activPAL measures were generally large for all stepping variables (d = 0.56-4.22); observed mean scores were systematically higher than from the activPAL. Correlations were higher for reclining time (r = .98- .99), and differences were smaller (d = 0.25-0.28), although the pattern was similar (observed scores were higher). Conclusions: activPAL data from the sound side and prosthetic side are similar for adults with unilateral lower limb absence. Validity of the activPAL in this population seems poor in simulated lifestyle activities. These results may be at least partly due to the brief sampling period or the simulated activity protocol.

AB - Introduction: Valid, reliable measurement of physical behaviours in adults with limb absence is essential to accurately describe physical behaviour patterns and intervention effects. Purpose: To assess parallel forms reliability and criterion-related validity of the activPAL for measuring steps and reclining time in simulated lifestyle activities in adults with unilateral lower limb absence. Methods: 15 adults completed three circuits of simulated kitchen work, sitting, lying and purposeful walking on level ground and stairs. Three trained raters independently analysed video recorded trials for incidental stepping, purposeful stepping and reclining. Simultaneous data were obtained from two activPAL monitors placed on the sound and prosthetic side. Data were analysed using oneway intraclass correlation coefficients (ICC; parallel forms reliability), and with Pearson correlations, oneway repeated ANOVAs, and Cohen's d (criterion-related validity). Results: Parallel forms reliability (prosthetic side vs. sound side) was poor for incidental steps (ICC = .05, d = 0.41) but acceptable for all other measures (ICC = .69-.98; d = 0.02-0.17). Correlations between direct observation and activPAL ranged from r = .65-.98 (activPAL on sound side) and from r = .30-.99 (activPAL on prosthetic side). Mean differences between observed measures and activPAL measures were generally large for all stepping variables (d = 0.56-4.22); observed mean scores were systematically higher than from the activPAL. Correlations were higher for reclining time (r = .98- .99), and differences were smaller (d = 0.25-0.28), although the pattern was similar (observed scores were higher). Conclusions: activPAL data from the sound side and prosthetic side are similar for adults with unilateral lower limb absence. Validity of the activPAL in this population seems poor in simulated lifestyle activities. These results may be at least partly due to the brief sampling period or the simulated activity protocol.

KW - reliability

KW - validity

KW - amputee

KW - amputation

KW - measurement

KW - stepping activity

KW - physical activity

UR - https://ismpb.org/2017-bethesda/

M3 - Poster

ER -

Rowe D, Deans S, Kirk A, McGarry A, Mitchell H, Sloan L et al. Reliability and validity of the activPAL for measuring stepping and reclining in unilateral lower limb amputees. 2017. Poster session presented at International Conference on Ambulatory Monitoring of Physical Activity and Movement , Maryland, United States.