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Statistical methods for assessing agreement between two methods of clinical measurement.

Lancet

Diagnosis, standards, Statistics as Topic, Humans, Peak Expiratory Flow Rate

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      Abstract

      In clinical measurement comparison of a new measurement technique with an established one is often needed to see whether they agree sufficiently for the new to replace the old. Such investigations are often analysed inappropriately, notably by using correlation coefficients. The use of correlation is misleading. An alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability.

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      2868172

      Chemistry

      Diagnosis, standards, Statistics as Topic, Humans, Peak Expiratory Flow Rate

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