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Reliability and agreement of 5 Ergo-Kit functional capacity evaluation lifting tests in subjects with low back pain
Vincent Gouttebarge1, Haije Wind, P Paul Kuijer
1Coronel Institute of Occupational Health, Academic Medical Center, Universiteit van Amsterdam, Amsterdam, The Netherlands. v.gouttebarge@amc.uva.nl
Objective:
To assess interrater reliability and agreement of 5 Ergo-Kit functional capacity evaluation lifting tests in subjects with low back pain (LBP).
Design:
Within-subjects design, with 2 repeated measurements.
Setting:
Academic medical center in The Netherlands.
Participants:
Twenty-four subjects (10 men, 14 women) with LBP.
Interventions:
Not applicable.
Main Outcome Measure:
Five Ergo-Kit lifting tests (2 isometric, 3 dynamic) were assessed on 2 occasions (t1, t2), by 2 different raters (R1, R2). The interval between the test sessions was 3 days. Interrater reliability level was expressed with the intraclass correlation coefficient (ICC), and the level of agreement between raters with the standard error (SE) of measurement.
Results:
ICCs means (reliability) of isometric and dynamic Ergo-Kit lifting tests ranged from .94 to .97, and SE of measurement values (agreement) ranged from 1.9 to 8.6 kg.
Conclusions:
There was good reliability and agreement between raters of the isometric and dynamic Ergo-Kit lifting tests in subjects with LBP, which supports the use of these tests to assess functional lifting capacity.
