Table 3.

Comparison of the Centers for Medicare & Medicaid Services (CMS) Standard Model with the CMS Hierarchical Model across the three index conditions based on net reclassification improvement (NRI) and integrated discrimination improvement (IDI).

Model	NRI												IDI
	Categorical (95% CI)	z value		P value	Continuous (95% CI)		z value		P value			IDI (95% CI)			z value		P value
COPDa	0.023 (0.012 to 0.034)	−4.10	<.001		0.059 (0.034 to 0.083)	−4.68		<.001			0.0002 (−0.0004 to 0.0008)			−0.65		.51
CHFb	−0.010 (−0.016 to −0.004)	3.27	.001		−0.038 (−0.057 to −0.019)	3.92				<.001	−0.0006 (−0.0009 to −0.0003)			3.92		<.001
THA/TKAc	0.022 (0.012 to 0.032)	−4.31	<.001		0.111 (0.080 to 0.142)	−7.01				<.001	−0.003 (−0.004 to −0.002)			5.88		<.001

^aCOPD: chronic obstructive pulmonary disease.

^bCHF: congestive heart failure.

^cTHA/TKA: total hip arthroplasty/total knee arthroplasty.