Table 1.

Impact of unplanned TKA readmissions on hospital finances for all visits

	Reimbursement (USD)	Total cost (USD)	Profit (USD)	Variable cost (USD)	Contribution margin (USD)
Median episode of TKA care (Interquartile range)	24,149 (16,600; 29,189) Range, 3718 to 122,503	16,361 (13,987; 21,013) Range, 5740 to 142,789	5209 (1319; 11,127) Range, −92,769 to 85,415	10,190 (8695; 13,514) Range: 2998 to 81,558	11,726 (7361; 16,957) Range, −27,836 to 98,657
Median unplanned readmission (Interquartile range)	7824 (5495; 12,910) Range, 2583 to 64,323	8027 (4959; 14,121) Range, 1345 to 91,457	608 (−3084; 3424) Range, −42,415 to 37,886	4380 (2540; 7418) Range, 320 to 33,877	3814 (1660; 6374) Range, −4875 to 50,126