Table C.

Descriptors of patients at High and Low Volumes

	High Volume Hospital (n = 1690)	Low Volume Hospital (n = 240)	Odds Ratio of LVH selection
Age mean (s.d.) in years	73.2 (7.1)	73.2 (7.5)	1.00
Female (%)	63.9	63.9	0.98
Caucasian (%)	98.1	98.4	1.05
Original reason for Medicare eligibility* (%)
Aged	88.2	88.5	(Referent)
Disabled	11.8	11.5	1.08
State aid recipient (%)	6.4	4.5	0.65
Median Income, Mean (s.d) in $000	32.5 (4.9)	31.9 (5.3)	0.99
Revision (vs. Primary) TKR (%)	8.9	3.7	0.41†
Charlson mean number of comorbidities (s.d.)	0.74 (1.0)	0.80 (1.2)	1.05

^*

Does not sum to 100% (Renal Disease excluded)

^†

p = 0.0098