ASSESSING AGREEMENT BETWEEN CLINICAL MEASUREMENT METHODS

Nursing practice and research often require the use of one measurement method in place of another, creating the need to know how well one cl inical measurement method approximates another. The usual statistical analyses for assessing agreement between measurement methods are the c orrelation coefficient and the paired t test. This article suggests th at these statistical methods do not address the question of agreement. It proposes the limits of agreement as a more informative analysis wh en a researcher is interested in replacing one measurement method with another. The application of limits of agreement analysis to assess re peatability of one measurement method is also introduced.