About 10% of hospitals in the United States earned a five-star overall rating on the Centers for Medicare & Medicaid Services (CMS) Hospital Compare website after CMS updated its rating methodology. This compares to about 2% under the previous methodology. Four key enhancements were made to the Overall Star Rating methodology for the December 2017 ratings, which include: For latent variable models, adaptive quadrature was evaluated, rather than non-adaptive quadrature. Hospital summary scores are not winsorized, meaning that extremely good scores and extremely bad scores were not set to the lower limits of the . . .
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