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Comment & Response
July 2017

Different Pediatric Survival After Cardiac Arrest

Author Affiliations
  • 1Ghent University, Applied Mathematics, Computer Science and Statistics, Ghent, East Flanders, Belgium
  • 2Université Paris Descartes, Paris, France
JAMA Pediatr. 2017;171(7):708-709. doi:10.1001/jamapediatrics.2017.0860

To the Editor Bhanji et al1 found that in-hospital mortality of pediatric patients undergoing cardiopulmonary resuscitation for cardiac arrest was lower during the day/evening than at night. They suggest a causal effect may be at play, possibly mediated by lower staffing at night, and make efforts to estimate the day/night risk contrast in exchangeable populations. Unfortunately, important sources of potential bias were left unaddressed. Here, we request extra steps to accommodate likely confounders.