Table 3.

: Effect of Case-Mix Adjustment on Variation across Providers and Patients

	Physician	Dialysis Facility	Patient
Resource use for separately billable services ($/session)*
SD (unadjusted)	$7.55	$24.52	$64.64
SD (adjusted)	$7.34	$22.39	$60.12
Percent of months with hematocrit ≥33%
SD (unadjusted)	2.64%	6.90%	28.25%
SD (adjusted)	2.55%	6.45%	27.36%
Percent of months with URR≥65%†
SD (unadjusted)	2.73%	6.54%	20.75%
SD (adjusted)	2.52%	6.30%	19.68%

^*Number of physician/facility pairs: 10,737. Results are based on an 80% random sample. Resource use included patient obligations.

^†Number of physician/facility pairs: 8,714.