Why do star ratings?
Now we’re giving star ratings to hospitals? Does anyone think this is a good idea? Actually, I do. Hospital ratings schemes have cropped up all over the place, and sorting out what’s important and what isn’t is difficult and time consuming. The Centers for Medicare & Medicaid Services (CMS) runs the best known and most comprehensive hospital rating website, Hospital Compare. But, unlike most “rating” systems, Hospital Compare simply reports data on a large number of performance measures – from processes of care (did the patient get the antibiotics in time) to outcomes (did the patient die) to patient experience (was the patient treated with dignity and respect?). The measures they focus on are important, generally valid, and usually endorsed by the National Quality Forum. The one big problem with Hospital Compare? It isn’t particularly consumer friendly. With the large number of data points, it might take consumers hours to sort through all the information and figure out which hospitals are good and which ones are not on which set of measures.
To address this problem, CMS just released a new star rating system, initially focusing on patient experience measures. It takes a hospital’s scores on a series of validated patient experience measures and converts them into a single star rating (rating each hospital 1 star to 5 stars). I like it. Yes, it’s simplistic – but it is far more useful than the large number of individual measures that are hard to follow. There was no evidence that patients and consumers were using any of the data that were out there. I’m not sure that they will start using this one – but at least there’s a chance. And, with excellent coverage of this rating system from journalists like Jordan Rau of Kaiser Health News, the word is getting out to consumers.
Our analysis
In order to understand the rating system a little bit better, I asked our team’s chief analyst, Jie Zheng, to help us better understand who did well, and who did badly on the star rating systems. We linked the hospital rating data to the American Hospital Association annual survey, which has data on structural characteristics of hospitals. She then ran both bivariate and multivariable analyses looking at a set of hospital characteristics and whether they predict receiving 5 stars. Given that for patients, the bivariate analyses are most straightforward and useful, we only present those data here.






