Table 2.

Estimated Incremental Costs per Additional Day of Hospitalization in the Commercially Insured Population

Analysis	Incremental Costs per Day, $
	Uncomplicated Hospitalizations	Hospitalizations with ICU	ICU Only
Base case OLS regressiona	2158	3900	5254
Sensitivity analysis
OLS regression on all qualified hospitalizations	2537	5646	6853
Weighted differenceb	2634	4637	4569
Weighted betac	2684	4735	3970

Notes: ^aHospitalizations/ICU with length of stay or costs that exceeded the 99th percentile were excluded. ^bCalculation was capped at the 99th percentile of the length-of-stay distribution. ^cModel was fit for each length-of-stay pair up to the 99th percentile of length-of-stay.

Abbreviations: FFS, fee for service; ICU, intensive care unit; OLS, ordinary least squares.