. Author manuscript; available in PMC: 2018 Apr 3.

Published in final edited form as: Am J Accountable Care. 2017 Dec 8;5(4):12–18.

Table 3.

Cost of Index Admission and Readmissions

	DRG (n = 459)	ICD-9 (n = 239)	P

Total index hospitalization cost			<.001
mean (SD)	$5181 ($3437)	$23,153 ($55,062)
median (IQR)	$4281 ($2718-$6537)	$13,677 ($7489-$23,054)

Aggregate cost of 30-day readmissions per patient^a (n = 660)			.004
mean (SD)	$1667 ($5872)	$3122 ($12,564)

Aggregate cost of 90-day readmissions per patient^b (n = 660)			<.001
mean (SD)	$4116 ($10,493)	$5376 ($14,882)

DRG indicates diagnosis-related group; ICD-9, International Classification of Diseases, Ninth Revision; IQR, interquartile range.

30-day all-cause readmissions: 65/456 (14.3%) in DRG versus 40/204 (19.7%) in ICD-9 (P = .080).

90-day all-cause readmissions: 122/456 (26.8%) in DRG versus 63/204 (31.0%) in ICD-9 (P = .266).