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

Table 4

Logistic regression analysis of R0 margin status.

Variable	95% Wald
	Odds ratio	Confidence limits		value
Age	0.98	0.98	0.99	<0.0001
Female (reference = male)	1.11	0.94	1.31	0.215
Race (reference = white)
Black	1.20	0.90	1.60	0.21
Other	0.98	0.69	1.40	0.93
Charlson–Deyo (reference = 2)
0	0.86	0.69	1.07	0.19
1	0.76	0.51	1.13	0.17
Hospital volume (reference = high)
Medium	0.38	0.21	0.70	0.0019
Low	0.46	0.31	0.70	0.0003