An increase in baby deaths at the Countess of Chester Hospital’s neonatal unit in 2015 was not steep enough to be considered an “outlier”, the public inquiry over Lucy Letby’s crimes has heard.
Professor Sir David Spiegelhalter, emeritus professor of statistics at the University of Cambridge, told the Thirlwall Inquiry that eight deaths at the unit in that year merited a local investigation but “does not mean necessarily that there is a special cause for it”.
