1. Hospital performance improvement: trends in quality and efficiency : a quantitative analysis of performance improvement in U.S. hospitals Publication: [New York, N.Y.] : Commonwealth Fund, [2007] Subject(s): Hospitals -- statistics & numerical dataHospital MortalityQuality of Health Care -- statistics & numerical dataForecastingLength of StayQuality Indicators, Health CareQuality of Health Care -- trendsHumansUnited States