Exercise capacity in non-specific chronic low back pain patients: a lean body mass-based Astrand bicycle test; reliability, validity and feasibility

Audy Paul Hodselmans, Pieter U Dijkstra, Jan H B Geertzen, Cees van der Schans

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

OBJECTIVE: Measurement of exercise capacity is essential in patients with non-specific chronic low back pain (CLBP). However, the conventional Astrand bicycle test is not feasible in patients with a very poor aerobic capacity. Therefore the Astrand bicycles test for non-specific CLBP patients based on lean body mass (LBM) was developed as an alternative. The aim of this study was to evaluate reliability and validity of the LBM-based Astrand test.

SUBJECTS: Twenty patients with non-specific CLBP and 20 healthy subjects were included for the reliability evaluation, and 19 healthy subjects for the validity evaluation.

METHOD: Patients and healthy subjects were assessed twice. Intra class correlation (ICC), repeatability coefficient (RC) and the limits of agreement (LOA) were calculated as a measure of test re-tests reliability. An ICC >or= 0.75 was considered acceptable. Validity was tested by calculating ICC between the LBM-based Astrand test and a maximal bicycle test.

RESULTS: The LBM-based Astrand test shows good reliability, reflected by an ICC >or= 0.91 and 95% of the 20 patients could perform the test. However, differences with the estimated true value reflected by the RC and natural variation reflected by the LOA were substantial in patients. Validity was good, reflected by ICC >or= 0.88.

CONCLUSION: The present study shows that the LBM-based Astrand test is a reliable, valid, and feasible method for patients with non-specific CLBP. However, a substantial amount of variation should be taken into account in patients when interpreting the test results clinically.

Original languageEnglish
Pages (from-to)282-289
JournalJournal of occupational rehabilitation
Volume18
Issue number3
DOIs
Publication statusPublished - Sep 2008

Keywords

  • adults
  • exercise test
  • exercise tolerance
  • females
  • humans
  • low back pain
  • males
  • reproducibility of results
  • young adults
  • validation studies

Cite this

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title = "Exercise capacity in non-specific chronic low back pain patients: a lean body mass-based Astrand bicycle test; reliability, validity and feasibility",
abstract = "OBJECTIVE: Measurement of exercise capacity is essential in patients with non-specific chronic low back pain (CLBP). However, the conventional Astrand bicycle test is not feasible in patients with a very poor aerobic capacity. Therefore the Astrand bicycles test for non-specific CLBP patients based on lean body mass (LBM) was developed as an alternative. The aim of this study was to evaluate reliability and validity of the LBM-based Astrand test.SUBJECTS: Twenty patients with non-specific CLBP and 20 healthy subjects were included for the reliability evaluation, and 19 healthy subjects for the validity evaluation.METHOD: Patients and healthy subjects were assessed twice. Intra class correlation (ICC), repeatability coefficient (RC) and the limits of agreement (LOA) were calculated as a measure of test re-tests reliability. An ICC >or= 0.75 was considered acceptable. Validity was tested by calculating ICC between the LBM-based Astrand test and a maximal bicycle test.RESULTS: The LBM-based Astrand test shows good reliability, reflected by an ICC >or= 0.91 and 95{\%} of the 20 patients could perform the test. However, differences with the estimated true value reflected by the RC and natural variation reflected by the LOA were substantial in patients. Validity was good, reflected by ICC >or= 0.88.CONCLUSION: The present study shows that the LBM-based Astrand test is a reliable, valid, and feasible method for patients with non-specific CLBP. However, a substantial amount of variation should be taken into account in patients when interpreting the test results clinically.",
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author = "Hodselmans, {Audy Paul} and Dijkstra, {Pieter U} and Geertzen, {Jan H B} and {van der Schans}, Cees",
year = "2008",
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doi = "10.1007/s10926-008-9143-2",
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Exercise capacity in non-specific chronic low back pain patients : a lean body mass-based Astrand bicycle test; reliability, validity and feasibility. / Hodselmans, Audy Paul; Dijkstra, Pieter U; Geertzen, Jan H B; van der Schans, Cees.

In: Journal of occupational rehabilitation, Vol. 18, No. 3, 09.2008, p. 282-289.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Exercise capacity in non-specific chronic low back pain patients

T2 - a lean body mass-based Astrand bicycle test; reliability, validity and feasibility

AU - Hodselmans, Audy Paul

AU - Dijkstra, Pieter U

AU - Geertzen, Jan H B

AU - van der Schans, Cees

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N2 - OBJECTIVE: Measurement of exercise capacity is essential in patients with non-specific chronic low back pain (CLBP). However, the conventional Astrand bicycle test is not feasible in patients with a very poor aerobic capacity. Therefore the Astrand bicycles test for non-specific CLBP patients based on lean body mass (LBM) was developed as an alternative. The aim of this study was to evaluate reliability and validity of the LBM-based Astrand test.SUBJECTS: Twenty patients with non-specific CLBP and 20 healthy subjects were included for the reliability evaluation, and 19 healthy subjects for the validity evaluation.METHOD: Patients and healthy subjects were assessed twice. Intra class correlation (ICC), repeatability coefficient (RC) and the limits of agreement (LOA) were calculated as a measure of test re-tests reliability. An ICC >or= 0.75 was considered acceptable. Validity was tested by calculating ICC between the LBM-based Astrand test and a maximal bicycle test.RESULTS: The LBM-based Astrand test shows good reliability, reflected by an ICC >or= 0.91 and 95% of the 20 patients could perform the test. However, differences with the estimated true value reflected by the RC and natural variation reflected by the LOA were substantial in patients. Validity was good, reflected by ICC >or= 0.88.CONCLUSION: The present study shows that the LBM-based Astrand test is a reliable, valid, and feasible method for patients with non-specific CLBP. However, a substantial amount of variation should be taken into account in patients when interpreting the test results clinically.

AB - OBJECTIVE: Measurement of exercise capacity is essential in patients with non-specific chronic low back pain (CLBP). However, the conventional Astrand bicycle test is not feasible in patients with a very poor aerobic capacity. Therefore the Astrand bicycles test for non-specific CLBP patients based on lean body mass (LBM) was developed as an alternative. The aim of this study was to evaluate reliability and validity of the LBM-based Astrand test.SUBJECTS: Twenty patients with non-specific CLBP and 20 healthy subjects were included for the reliability evaluation, and 19 healthy subjects for the validity evaluation.METHOD: Patients and healthy subjects were assessed twice. Intra class correlation (ICC), repeatability coefficient (RC) and the limits of agreement (LOA) were calculated as a measure of test re-tests reliability. An ICC >or= 0.75 was considered acceptable. Validity was tested by calculating ICC between the LBM-based Astrand test and a maximal bicycle test.RESULTS: The LBM-based Astrand test shows good reliability, reflected by an ICC >or= 0.91 and 95% of the 20 patients could perform the test. However, differences with the estimated true value reflected by the RC and natural variation reflected by the LOA were substantial in patients. Validity was good, reflected by ICC >or= 0.88.CONCLUSION: The present study shows that the LBM-based Astrand test is a reliable, valid, and feasible method for patients with non-specific CLBP. However, a substantial amount of variation should be taken into account in patients when interpreting the test results clinically.

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KW - validation studies

KW - volwassene

KW - casus-gecontroleerde studies

KW - oefeningstest

KW - oefeningstolerantie

KW - vrouwelijk

KW - mensen

KW - lage rugpijn

KW - mannelijk

KW - reproduceerbaarheid van de resultaten

KW - jongvolwassene

KW - validatiestudies

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M3 - Article

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JO - Journal of occupational rehabilitation

JF - Journal of occupational rehabilitation

SN - 1053-0487

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