HealthGrades Methodology Steps In Developing Hospital Performance Ratings

1. They "determine what conditions a patient has or procedures performed to identify patient like groups using ICD-9 codes (and ICD-10 codes for Women’s Care) or in some cases DRGs.
2. The model outcomes reflect clinical-based measures of patient disposition during and after care and include in-hospital complications, or in-hospital and 30-day post-admission mortality.
3. They "consider the current condition of the patient and how that could possibly affect the outcome of the condition/procedure.
4. They develop list of potential risk factors (comorbid conditions, etc.)
5. They use logistic regression to determine which of the potential risk factors statistically relate to the outcome as well as the strength of that relationship.
6. They determine the hospital's predicted outcome rate by summing the individual patient predicted values for each hospital.
7. Using a statistical test, they compare the actual outcome for each hospital with that same hospital's predicted outcome.
8. A star rating is then assigned based on whether the hospital performed statistically better than, the same as, or worse than the predicted outcome.

Source: Healthgrades Methodology: Anatomy of a Rating
Source URL: https://www.healthgrades.com/quality/ratings-awards/methodology

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