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The 2003 Index of Hospital Quality

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dampen the effect <strong>of</strong> year-to-year fluctuations, mortality scores are averaged<br />

over three years.<br />

As with volume and RNs/beds ratios in the structural component, scores at the<br />

extreme in mortality were trimmed to eliminate the influence <strong>of</strong> very wide<br />

variation. Figure 9 shows the percentile at which each <strong>of</strong> the mortality<br />

distributions was trimmed.<br />

Figure 9. Percentile Where Mortality Distributions Were Trimmed<br />

Specialty Percentile<br />

Cancer 95<br />

Digestive Disorders 99<br />

Ear, Nose, and Throat 95<br />

Geriatrics 99<br />

Gynecology 99<br />

Heart and Heart Surgery 95<br />

Hormonal Disorders 95<br />

Kidney Disease 99<br />

Neurology and Neurosurgery 99<br />

Orthopedics 95<br />

Respiratory Disorders 99<br />

Rheumatology 99<br />

Urology 90<br />

As with volume and RNs/beds, restandardization is performed on the mortality<br />

scores after trimming extremes.<br />

25

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