The Volume-Outcome Relationship in Retroperitoneal Soft Tissue Sarcoma: Evidence of Improved Short- and Long-Term Outcomes at High-Volume Institutions

Table 3

Logistic regression analysis of 30-day postoperative mortality.

Variable	95% Wald
	Odds ratio	Confidence limits		value
Age	1.06	1.04	1.09	<0.0001
Female (reference = male)	0.92	0.61	1.40	0.71
Race (reference = white)
Black	1.16	0.56	2.39	0.69
Other	0.74	0.23	2.37	0.61
Charlson–Deyo (reference = 2)
0	1.13	0.65	1.95	0.66
1	1.67	0.79	3.50	0.18
Hospital volume (reference = high)
Medium	2.73	0.65	11.51	0.17
Low	4.66	2.26	9.63	<0.0001