Central venous pressure monitoring and mortality: What was neglected?

According to the inclusion and exclusion criteria of Chen’s study, we extracted a very similar (10,131) but not identical (10,275) cohort (because we didn’t get the authors’ original codes). [...]the proportions of surgical and medical patients could not be adjusted between CVP monitoring and non-CVP monitoring groups, which means that the effect of admission resources could not be replaced by service units. Rights and permissions Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.