The slope prior to the first accreditation (β 1 ) is positive and highly significant (presurvey ramp up phase), as predicted by the life cycle model of Devkaran and O’Farrell. 7 11 The change in level following the first accreditation survey (β 2 ) is unexpectedly positive, but is not significant.
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Impact of repeated hospital accreditation surveys on quality and reliability, an 8-year interrupted time series analysis.
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