Table 3

Permutation feature importance for prediction of in-hospital death following surgical treatment of vertebral fractures in patients with AS and DISH.

Outcome and Features	Average Permutation Feature Importance	Mean ± SD or % (n)		P
Outcome and Features	Average Permutation Feature Importance	Survived to Discharge	In-Hospital Death	P
Days from admission to surgery	0.0851	2.36 ± 2.72	2.14 ± 1.58	0.828
Thoracic fracture	0.0843	55.2% (1635)	2.0% (60)	<0.001
Hypertension with end-organ complications	0.0541	22.5% (665)	2.5% (75)	<0.001
Spinal cord injury	0.0541	11.5% (340)	1.9% (55)	<0.001
Cervical fracture	0.0402	29.4% (870)	2.5% (75)	<0.001
Age	0.0338	72.89 ± 10.17	77.34 ± 7.69	<0.001
Primary payer - Medicare	0.0221	67.1% (1985)	4.7% (140)	<0.001
Thoracic fusion	0.0212	42.3% (1250)	2.4% (70)	0.825
Median household income: 76th–100th percentile	0.0161	22.3% (660)	0.5% (15)	<0.001
Cervical fusion	0.0156	19.8% (585)	1.69% (50)	0.002