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    Confidence Intervals and Sample Size Calculations for Studies of Film-reading Performance

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    Publication date
    2003
    Author
    Scally, Andy J.
    Brealey, S.
    Keyword
    Ultrasound
    Plain-film radiography
    Film-reading performance
    Sample size
    Confidence intervals
    Image interpretation
    Peer-Reviewed
    yes
    
    Metadata
    Show full item record
    Abstract
    The relaxation of restrictions on the type of professions that can report films has resulted in radiographers and other healthcare professionals becoming increasingly involved in image interpretation in areas such as mammography, ultrasound and plain-film radiography. Little attention, however, has been given to sample size determinations concerning film-reading performance characteristics such as sensitivity, specificity and accuracy. Illustrated with hypothetical examples, this paper begins by considering standard errors and confidence intervals for performance characteristics and then discusses methods for determining sample size for studies of film-reading performance. Used appropriately, these approaches should result in studies that produce estimates of film-reading performance with adequate precision and enable investigators to optimize the sample size in their studies for the question they seek to answer.
    URI
    http://hdl.handle.net/10454/6413
    Version
    published version paper
    Citation
    Scally. A. J. and Brealey, S. Confidence intervals and sample size estimation for studies of film reading performance. Clinical Radiology 58 (3): 238-246.
    Link to publisher’s version
    http://dx.doi.org/10.1016/S0009-9260(02)00457-9
    Type
    Article
    Collections
    Health Studies Publications

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