Table 3:

Components of Hospital-Level Spending Variation Across Bariatric Surgery Episodes

	Hospital Quintile
Spending Category	1	5	% of Total	% of Q5-Q1 Variation	Q5-Q1 Difference	p for Q5-Q1 difference
Total	$12,220	$16,887			$4,667	<.001
Inpatient DRG	$8,452	$8,772	59%	7%	$320	<.001
Outlier	$8	$422	1%	9%	$414	0.01
Index Professional	$1,807	$2,257	14%	10%	$450	<.001
Emergency Department	$217	$329	2%	2%	$112	<.001
Post-Acute Care	$140	$1,011	4%	19%	$871	<.001
Readmissions	$532	$2,575	11%	44%	$2,043	<.001
Post-Discharge Professional	$676	$909	5%	5%	$233	<.001
Post-Discharge Facility	$386	$612	3%	5%	$226	0.00

NOTES: Quintiles are based on hospital average episode spending, adjusted for case mix, inflation, year, procedure choice, and hospital characteristics. % of total is calculated as an average across the lowest- and highest-spending quintiles. % of variation is calculated as the percent of the difference in total episode spending between Q5 and Q1 attributable to each category.