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Figure 4 Individual states’ 1992 adjusted bypass surgery 30-day mortality rate (controlling for age, gender, race, acute MI admission and comorbidity) vs. their adjusted average yearly decline in bypass surgery mortality risk between 1987 and 1992. The crosslines indicate national averages. Note: NNE refers to the northern New England region (Maine, New Hampshire and Vermont) which share a provider profiling program. LoVol refers to a composite of 10 states performing 500 or less bypass surgeries per year (including Alaska, Wyoming, Delaware, Idaho, New Mexico, Hawaii, Rhode Island, Montana and North and South Dakota).
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