Correction to: Journal of Perinatology; https://doi.org/10.1038/s41372-018-0189-5; published online 09 August 2018

Since the publication of the above Article, the authors have noted that the name of the first Item in the NRAS scoring system in Fig. 1 was omitted. It is Heart Rate (C1). The authors apologise for any inconvenience caused by this error. The HTML and online PDF versions have now been rectified and carry the corrected Figure.