The Balance Intensity Scales for Therapists and Exercisers Measure Balance Exercise Intensity in Older Adults: Initial Validation Using Rasch Analysis

Melanie Farlie, Jenny Keating, Elizabeth Molloy, Kelly-Ann Bowles, Becky Neave, Jessica Yamin, Josie Weightman, Kelly J Saber, Terry P. Haines

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background: The Balance Intensity Scales (BIS) have been developed to measure the intensity of balance exercise in older adults. Objective: The objective was to determine whether the BIS for therapists (BIS-T) and for exercisers (BIS-E) are unidimensional measures of balance exercise intensity, able to be refined using the Rasch model into a hierarchical item order, and appropriately targeted for the older adult population with a variety of diagnoses in a range of exercise testing settings. Design: This was a scale development study using a pragmatic mixed-methods approach. Methods: Older adult exercisers (n = 108) and their therapists (n = 33) were recruited from a large metropolitan health service and rated balance exercise tasks on the BIS-T and BIS-E in a single session. Results: Scores on both the BIS items and global effort ratings for therapists and exercisers had good correlation and demonstrated unidimensionality. The BIS-T and BIS-E demonstrated a hierarchical distribution of items that fit the Rasch model. The Person Separation Index was moderate (0.62) for the BIS-T but poor (0.33) for the BIS-E. Limitations: The limitations were that therapists in this study underprescribed high-intensity balance tasks. Conclusions: Initial validation of the BIS-T and the BIS-E demonstrated that these scales can be used for the measurement of balance exercise intensity in older adult populations. The BIS-T items and global effort ratings are recommended for use by therapists, and the global effort ratings are recommended for use by exercisers. Ongoing validation of both scales using high-intensity balance task ratings and different populations of older adults is recommended.

Original languageEnglish
Pages (from-to)1394-1404
Number of pages11
JournalPhysical Therapy
Volume99
Issue number10
DOIs
Publication statusPublished - 28 Oct 2019

Keywords

  • balance exercise
  • Older adults

Cite this

@article{03225713cc7840518814fe2b8c29a8ee,
title = "The Balance Intensity Scales for Therapists and Exercisers Measure Balance Exercise Intensity in Older Adults: Initial Validation Using Rasch Analysis",
abstract = "Background: The Balance Intensity Scales (BIS) have been developed to measure the intensity of balance exercise in older adults. Objective: The objective was to determine whether the BIS for therapists (BIS-T) and for exercisers (BIS-E) are unidimensional measures of balance exercise intensity, able to be refined using the Rasch model into a hierarchical item order, and appropriately targeted for the older adult population with a variety of diagnoses in a range of exercise testing settings. Design: This was a scale development study using a pragmatic mixed-methods approach. Methods: Older adult exercisers (n = 108) and their therapists (n = 33) were recruited from a large metropolitan health service and rated balance exercise tasks on the BIS-T and BIS-E in a single session. Results: Scores on both the BIS items and global effort ratings for therapists and exercisers had good correlation and demonstrated unidimensionality. The BIS-T and BIS-E demonstrated a hierarchical distribution of items that fit the Rasch model. The Person Separation Index was moderate (0.62) for the BIS-T but poor (0.33) for the BIS-E. Limitations: The limitations were that therapists in this study underprescribed high-intensity balance tasks. Conclusions: Initial validation of the BIS-T and the BIS-E demonstrated that these scales can be used for the measurement of balance exercise intensity in older adult populations. The BIS-T items and global effort ratings are recommended for use by therapists, and the global effort ratings are recommended for use by exercisers. Ongoing validation of both scales using high-intensity balance task ratings and different populations of older adults is recommended.",
keywords = "balance exercise, Older adults",
author = "Melanie Farlie and Jenny Keating and Elizabeth Molloy and Kelly-Ann Bowles and Becky Neave and Jessica Yamin and Josie Weightman and Saber, {Kelly J} and Haines, {Terry P.}",
year = "2019",
month = "10",
day = "28",
doi = "10.1093/ptj/pzz092",
language = "English",
volume = "99",
pages = "1394--1404",
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The Balance Intensity Scales for Therapists and Exercisers Measure Balance Exercise Intensity in Older Adults : Initial Validation Using Rasch Analysis. / Farlie, Melanie; Keating, Jenny; Molloy, Elizabeth; Bowles, Kelly-Ann; Neave, Becky; Yamin, Jessica; Weightman, Josie; Saber, Kelly J; Haines, Terry P.

In: Physical Therapy, Vol. 99, No. 10, 28.10.2019, p. 1394-1404.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The Balance Intensity Scales for Therapists and Exercisers Measure Balance Exercise Intensity in Older Adults

T2 - Initial Validation Using Rasch Analysis

AU - Farlie, Melanie

AU - Keating, Jenny

AU - Molloy, Elizabeth

AU - Bowles, Kelly-Ann

AU - Neave, Becky

AU - Yamin, Jessica

AU - Weightman, Josie

AU - Saber, Kelly J

AU - Haines, Terry P.

PY - 2019/10/28

Y1 - 2019/10/28

N2 - Background: The Balance Intensity Scales (BIS) have been developed to measure the intensity of balance exercise in older adults. Objective: The objective was to determine whether the BIS for therapists (BIS-T) and for exercisers (BIS-E) are unidimensional measures of balance exercise intensity, able to be refined using the Rasch model into a hierarchical item order, and appropriately targeted for the older adult population with a variety of diagnoses in a range of exercise testing settings. Design: This was a scale development study using a pragmatic mixed-methods approach. Methods: Older adult exercisers (n = 108) and their therapists (n = 33) were recruited from a large metropolitan health service and rated balance exercise tasks on the BIS-T and BIS-E in a single session. Results: Scores on both the BIS items and global effort ratings for therapists and exercisers had good correlation and demonstrated unidimensionality. The BIS-T and BIS-E demonstrated a hierarchical distribution of items that fit the Rasch model. The Person Separation Index was moderate (0.62) for the BIS-T but poor (0.33) for the BIS-E. Limitations: The limitations were that therapists in this study underprescribed high-intensity balance tasks. Conclusions: Initial validation of the BIS-T and the BIS-E demonstrated that these scales can be used for the measurement of balance exercise intensity in older adult populations. The BIS-T items and global effort ratings are recommended for use by therapists, and the global effort ratings are recommended for use by exercisers. Ongoing validation of both scales using high-intensity balance task ratings and different populations of older adults is recommended.

AB - Background: The Balance Intensity Scales (BIS) have been developed to measure the intensity of balance exercise in older adults. Objective: The objective was to determine whether the BIS for therapists (BIS-T) and for exercisers (BIS-E) are unidimensional measures of balance exercise intensity, able to be refined using the Rasch model into a hierarchical item order, and appropriately targeted for the older adult population with a variety of diagnoses in a range of exercise testing settings. Design: This was a scale development study using a pragmatic mixed-methods approach. Methods: Older adult exercisers (n = 108) and their therapists (n = 33) were recruited from a large metropolitan health service and rated balance exercise tasks on the BIS-T and BIS-E in a single session. Results: Scores on both the BIS items and global effort ratings for therapists and exercisers had good correlation and demonstrated unidimensionality. The BIS-T and BIS-E demonstrated a hierarchical distribution of items that fit the Rasch model. The Person Separation Index was moderate (0.62) for the BIS-T but poor (0.33) for the BIS-E. Limitations: The limitations were that therapists in this study underprescribed high-intensity balance tasks. Conclusions: Initial validation of the BIS-T and the BIS-E demonstrated that these scales can be used for the measurement of balance exercise intensity in older adult populations. The BIS-T items and global effort ratings are recommended for use by therapists, and the global effort ratings are recommended for use by exercisers. Ongoing validation of both scales using high-intensity balance task ratings and different populations of older adults is recommended.

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