Evaluating the Reliability of Neuro-QWERTY Index, a Computer-Based Method for Early Diagnostic of Parkinson's Disease

Document Type : Original Article (s)

Authors

1 PhD in Biostatistics, Social Development and Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran

2 Associate Professor, Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran

3 Assistant Professor, Department of Physics, School of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Background: Early diagnose of Parkinson's disease has been possible by using neuro-QWERTY index, a computational algorithm for analyzing users’ interactions with a computer keyboard. This research was devoted to study the reliability of neuro-QWERTY index; as detecting the reliability is necessary to clear the usefulness of diagnostic and screening tests.Methods: Early Parkinson's disease database, which was used in aggregated format by Giancardo et al. in 2016 to introduce neuro-QWERTY index, and to assess its validity, was used in this study in original format to assess the test-retest reliability of neuro-QWERTY index. Intraclass correlation coefficient (ICC), Bland-Altman plot, and coefficient of repeatability (CR) were used for statistical analyses. Moreover, using DeLong’s statistical test, area under curves (AUCs) of receiver operating curves (ROCs) was compared for test and retest scores, and their average scores.Findings: Intraclass correlation coefficient was 0.94, with a 95% confidence interval (CI) of 0.89 to 0.97. Bland-Altman plot showed that differences between test and retest scores were small. Coefficient of repeatability was 0.04, with a 95% CI of 0.03 to 0.05. The area under curves were 0.89, 0.90, and 0.92 for receiver operating curves of test score, retest score, and their average score, respectively. Differences between the areas under curves of receiver operating curves were not significant (P ≥ 0.25).Conclusion: Neuro-QWERTY index have a good reliability. Therefore, it could act as a suitable candidate for screening of Parkinson's disease, considering simplicity and inexpensiveness of its measurements, no side effects, good validity in terms of sensitivity and specificity, and as shown in this study, its acceptable reliability.

Keywords

References

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Journal of Isfahan Medical School
Volume 36, Issue 480 - Serial Number 480
March and April 2018
Pages 542-547

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History

  • Receive Date: 24 April 2018
  • Revise Date: 01 November 2024
  • Accept Date: 06 April 2022

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