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I'm just making this up, but... Perhaps hospitals that treat a disproportionate share of poor people (which themselves are disproportionately not white), tend

I'm just making this up, but... Perhaps hospitals that treat a disproportionate share of poor people (which themselves are disproportionately not white), tend to use a different brand of X-ray film, and that brand has different contrast ratios than that of the brand preferred by rich hospitals. Thus, they'd be detecting the different brand of X-ray film rather than anything about the patients themselves. Of course, at this level it's still hard to imagine generating that 82% hit rate. But maybe there are multiple factors along these lines.

lostlogin 5y ago
> tend to use a different brand of X-ray film Most of us radiology folk abandoned film 20 years ago and went to digital systems (CR or DR). This doesn’t negate your query though, as vendors do have different technologies and their images do not look the same.
kovek 5y ago
That sounds like a great idea and they can test for it! Classify the scans on the “type of film” and then alter the scan and see if the model recognizes it