We thank Dr. Dueck for his thoughtful reading of our article. Dr. Dueck’s first comment was also made by Saugel et al. in the accompanying editorial to our article. Therefore, we take the opportunity to comment on the issues raised and to discuss our statistical approach as detailed in the supplements.

We clearly stated in the Methods section of our article that we planned to calculate the differences of measurements between the two methods according to Bland–Altman for clustered observations. Despite this improved statistical approach, we assumed that the high variance in the number of measurements per patient (5 to 74) and the dominance of values in the normotonic range of blood pressure would confound the analysis. For anesthesiologists, the extreme blood pressure values, which naturally are rarely measured, are particularly important....

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