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Reducing measurement errors during functional capacity tests in elders. | LitMetric
Background : Accuracy is essential to the validity of functional capacity measurements.Aim : To evaluate the error of measurement of functional capacity tests for elders and suggest the use of the technical error of measurement and credibility coefficient.Methods : Twenty elders (65.8 ± 4.5 years) completed six functional capacity tests that were simultaneously filmed and timed by four evaluators by means of a chronometer. A fifth evaluator timed the tests by analyzing the videos (reference data).Results : The means of most evaluators for most tests were different from the reference (p < 0.05), except for two evaluators for two different tests. There were different technical error of measurement between tests and evaluators. The Bland-Altman test showed difference in the concordance of the results between methods. Short duration tests showed higher technical error of measurement than longer tests. In summary, tests timed by a chronometer underestimate the real results of the functional capacity.Discussion : Difference between evaluators' reaction time and perception to determine the start and the end of the tests would justify the errors of measurement.Conclusion : Calculation of the technical error of measurement or the use of the camera can increase data validity.
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