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- Published on: 7 June 2005
- Published on: 26 April 2005
- Published on: 7 June 2005Limits of agreement and confidence intervalsShow More
Dear Editor,
Dr Müllner is wrong and Johnston and Murphy are correct. The limits of agreement are not a confidence interval but a range within which we expect most differences to lie. We expect for any sample from a Normal distribution that 95% of observations will be within 1.96 standard deviations from the mean. Here, 95 of differences, between arterial and venous potassium measurements will lie between –1.182...
Conflict of Interest:
None declared. - Published on: 26 April 2005Confidence interval incorrectly explainedShow More
Dear Editor,
While the results of this study appear very useful there are two issues. One is more of a theoretical nature: the interpretation of the 95% confidence interval; the second has something to do with external validity: potential selection bias.
Interpretation of the confidence interval:
In the abstract the authors state that "...the 95% limits of agreement were wide (–1.182 mmol...Conflict of Interest:
None declared.