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. 2006 Aug;41(4 Pt 1):1413–1437. doi: 10.1111/j.1475-6773.2006.00554.x

Figure 4.

Figure 4

Standardized Mortality Ratio (OMR/EMR) for Coronary Artery Bypass Graft—Impact of Date Stamping of ICD-9-CM Codes on Identity of Low-Performance and High-Performance Hospitals

Hospitals with an OMR/EMR ratio less than 1 and with a 95% confidence interval that does not cross 1 are high-quality outliers. Hospitals with an OMR/EMR ratio greater than 1 and with a 95% confidence interval that does not cross 1 are low-quality outliers. Each hospital SMR is represented twice: first based on the “date stamp” model (light gray), then based on the “no date stamp” model (dark gray).

*indicates that OMR/EMR was obtained using the date-stamp model abbreviations: OMR, observed mortality rate; EMR, expected mortality rate