title: ACS NSQIP hospitals significantly improve outcomes over time.
mesh_terms: D013502:General Surgery / Q000592:standards* / Q000639:trends; D006761:Hospitals / Q000592:standards / Q000639:trends*; D017063:Outcome Assessment, Health Care; D058996:Quality Improvement / Q000639:trends*; D012955:Societies, Medical; D014481:United States