Table 3.

Health care cost savings with ERAS (2015 Canadian dollars)

Outcome	Total change, d	Unit cost	Base-case analysis			Scenario analysis
			Base case	Low	High
Primary LOS, d*	−1990	$1566	$3 116 340	$2 017 008	$4 217 238	$3 116 340
Number of ED visits	−57	$904	0	0	0	$51 528
Number of specialist visits	137	$352	0	0	0	−$48 224
Number of GP visits	−109	$196	0	0	0	$21 364
Prevented readmissions	−18	$2696	0	0	0	$48 528
Readmission LOS, d	−419	$1566	0	0	0	$656 154
Total cost			$3 116 340	$2 017 008	$4 217 238	$3 845 690
Cost of ERAS†			$826 210	$826 210	$826 210	$826 210
Total net cost savings			$2 290 130	$1 190 798	$3 391 028	$3 019 480
Net cost savings per patient			$1,768	$920	$2,619	$2332
Return on investment ratio			3.8	2.4	5.1	4.7

ED = emergency department; ERAS = Enhanced Recovery After Surgery; GP = general practitioner; LOS = length of stay in hospital.

^*p < 0.000.

^†$638 per patient × 1295 patients.