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Addressing Critiques of the Proposed CMS Metric of Organ Procurement Organ Performance: More Data Isn't Better.

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BACKGROUND CMS has proposed a rule change to redefine the metric by which organ procurement organizations (OPOs) are evaluated. The metric relies on CDC data on inpatient deaths from causes… Click to show full abstract

BACKGROUND CMS has proposed a rule change to redefine the metric by which organ procurement organizations (OPOs) are evaluated. The metric relies on CDC data on inpatient deaths from causes consistent with donation among patients <75 years of age. Concerns have been raised that this metric does not account for rates of ventilation, and prevalence of cancer and severe sepsis, without objective data to substantiate or refute such concerns. METHODS We estimated OPO-level donation rates using CDC data, and used AHRQ/HCUP data from 43 State Inpatient Databases (SIDs) to calculate 'adjusted' donation rates. RESULTS The CMS metric and the ventilation-adjusted CMS metric were highly concordant in absolute terms (Spearman and Pearson correlation coefficients ≥0.95). In the Bland-Altman plot, 100% (48/48) of paired values (SDs of the CMS and 'ventilation adjusted' metrics) were within 1.96SDs of the mean difference, with near-perfect correlation in Passing and Bablok regression (Lin's concordance correlation coefficient: 0.97. The CMS metric and the ventilation/cancer/sepsis-adjusted metric were highly concordant in absolute terms (Spearman and Pearson correlation coefficients ≥0.94). In the Bland-Altman plot, 97.9% (47/48) of paired values (SDs of the CMS and 'ventilation/cancer/sepsis adjusted' metrics) were within 1.96SDs of the mean difference, with near-perfect correlation in the Passing and Bablok regression (Lin's concordance correlation coefficient: 0.97). CONCLUSIONS These conclusions should provide CMS, and the transplant community, with comfort that the proposed CMS metric using CDC inpatient death data as a tool to compare OPO is not compromised by its lack of inclusion of ventilation or other comorbidity data.

Keywords: ventilation; organ procurement; metric organ; cms metric; proposed cms; correlation

Journal Title: Transplantation
Year Published: 2019

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