Table 3.

Relative importance of the top six features among the categorical variables.

Feature Names	Relative Importance
Chronic kidney disease	52.1
Rheumatoid arthritis	31.4
Presence of malignant tumor	28.4
Primary fracture site: proximal part of humerus	27.8
Warfarin use	27.2
No post-operative treatments for osteoporosis	26.3