Persistence of high volume: Share of high volume hospitals remaining high volume
Threshold 1Threshold 2
1995-199697.84%98.47%
1996-199797.88%96.53%

From: APPENDIX 7, Empirical Evaluation Results Tables

Cover of Refinement of the HCUP Quality Indicators
Refinement of the HCUP Quality Indicators.
Technical Reviews, No. 4.
Davies SM, Geppert J, McClellan M, et al.
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