• J Pediatr Urol · Dec 2008

    Clinical Trial

    Inter-observer and intra-observer agreement on interpretation of uroflowmetry curves of kindergarten children.

    • Shang-Jen Chang and Stephen S D Yang.
    • Division of Urology, Buddhist Tzu Chi General Hospital, Taipei Branch, Taipei, Taiwan.
    • J Pediatr Urol. 2008 Dec 1;4(6):422-7.

    PurposeTo evaluate the inter-observer and intra-observer agreement on the interpretation of uroflowmetry curves of children.Materials And MethodsHealthy kindergarten children were enrolled for evaluation of uroflowmetry. Uroflowmetry curves were classified as bell-shaped, tower, plateau, staccato and interrupted. Only the bell-shaped curves were regarded as normal. Two urodynamists evaluated the curves independently after reviewing the definitions of the different types of uroflowmetry curve. The senior urodynamist evaluated the curves twice 3 months apart. The final conclusion was made when consensus was reached. Agreement among observers was analyzed using kappa statistics.ResultsOf 190 uroflowmetry curves eligible for analysis, the intra-observer agreement in interpreting each type of curve and interpreting normalcy vs abnormality was good (kappa=0.71 and 0.68, respectively). Very good inter-observer agreement (kappa=0.81) on normalcy and good inter-observer agreement (kappa=0.73) on types of uroflowmetry were observed. Poor inter-observer agreement existed on the classification of specific types of abnormal uroflowmetry curves (kappa=0.07).ConclusionsUroflowmetry is a good screening tool for normalcy of kindergarten children, while not a good tool to define the specific types of abnormal uroflowmetry.

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