Figure 2.

Geriatric hospital—each point along the x-axis represents a single patient and indicates its Shapley Additive Explanations value for that feature. The Shapley Additive Explanations values are used to determine feature importance, with features listed in descending order of their contribution to the model’s predictions. Red color means that the feature has a higher value, and a blue color means that the feature has a lower value. Categorical features are shown as gray points. The most important features include procedure, has_dementia_or_cognitive_impairment, the billable diagnosis code (DRG), secondary_diagnosis, age, the Tinetti score, and Mini-Mental State Examination. Individuals with dementia or cognitive impairment face a higher fall risk (red points along the x-axis). Patients with higher Tinetti scores are mostly at a lower risk of falling.