Underreporting of nursing home utilization on the CMS-2728 in older incident dialysis patients and implications for assessing mortality risk

Table 1 Accuracy of the Centers for Medicare & Medicaid Services (CMS) Medical Evidence Report Form CMS-2728 nursing home status versus the “gold standard” CMS nursing home Minimum Data Set (MDS) among incident dialysis patients ≥ 75 years (n = 27,913)

	MDS (n)		Sensitivity	Specificity	PPV	NPV
CMS-2728 (n)	Yes	No
Yes	2,565	656	0.33	0.97	0.80	0.79
No	5,236	19,456	(0.32, 0.34)	(0.96, 0.97)	(0.78, 0.81)	(0.78, 0.79)

PPV = positive predictive value.
NPV = negative predictive value.
Nursing home status for the CMS-2728 defined as “2. nursing home” on item 17u.
Nursing home status for the MDS was defined by an MDS record prior to the ESRD date indicating that the patient was in a nursing home or an MDS record indicating admission to a nursing home within 30 days after the ESRD date.

ISSN: 1471-2369