“…First, it is important to recognize that while not all of the reductions seen are clearly causally attributable to the HEN intervention, the finding of improvement over time in 7 of 8 patient safety measures, regardless of cause, is remarkable. While some prior studies have suggested improvements after many years of hard work in adverse event rates for certain discrete conditions, hospital-wide rates of harms both in hospitals generally and in pediatric hospitals in particular appeared not to be improving in the years before the study by Coffey et al While the 8 serious safety events (SSEs) the authors followed are not a representative sample of all harms, they are some of the highest profile harms in hospitals and have been the focus of major patient safety improvement efforts. It is extremely encouraging to see data suggesting that work beginning to pay off, whether this is the result of the SPS’s work alone or the combined effect of the SPS plus one or more of the many concurrent, widespread efforts to improve safety, including high-reliability health care initiatives, reductions in resident-physician extended work shifts, changes in nurse workloads, or efforts to improve handoffs and communication on family-centered rounds, to name just a few.…”