The 2003 Index of Hospital Quality

Figure 4. Percentile Where Volume and RNs/Beds Distributions Were Trimmed
Specialty Volume
Percentile
11
RNs/Beds
Percentile
Cancer 90 95
Digestive Disorders 90 95
Ear, Nose, and Throat 95 95
Geriatrics -- 90
Gynecology 90 95
Heart and Heart Surgery 90 95
Hormonal Disorders no trimming 95
Kidney Disease no trimming 95
Neurology and Neurosurgery no trimming 95
Orthopedics 90 90
Respiratory Disorders 90 95
Rheumatology -- 90
Urology 95 90
4) Trauma:
A second round of standardization is performed after trimming extremes.
Restandardization restores balance so that trimmed and untrimmed measures
have the same influence on the final score.
In 1992, a U.S. News survey of board-certified physicians ranked the presence of
an emergency room and a hospital’s trauma provider level high on a list of
hospital quality indicators. Physicians in nine specialties ranked trauma as one
of the top five indicators of quality. The indications of these specialists and
resultant high factor loadings supported the inclusion of these data for Digestive
Disorders; Ear, Nose, and Throat; Gynecology; Heart and Heart Surgery;
Hormonal Disorders; Kidney Disease; Neurology and Neurosurgery;
Orthopedics; Respiratory Disorders, and Urology.