Table 2. Agreement and Disagreement Between Claims Data and Manual Record Review for the Development Set^a, Minneapolis, Minnesota, 2007–2008.

Enrollment Category	Enrollment Gap >31 days	No. of Visits for Heart Disease Based on Claims Data	Agreement in the Development Sample (95% CI)	Agreement in the Validation Sample (95% CI)
Enrolled any time from August 1, 2007–July 31, 2008	Gap	0	1.00 (0.90–1.00)	1.00 (0.90–1.00)
		1	0.90 (0.69–0.98)	0.90 (0.69–0.98)
		≥2	1.00 (0.90–1.00)	0.95 (0.76–0.99)
	No gap	0	1.00 (0.90–1.00)	1.00 (0.90–1.00)
		1	0.65 (0.43–0.82)	0.85 (0.63–0.96)
		≥2	1.00 (0.90–1.00)	0.85 (0.63–0.96)
Also enrolled on August 1, 2005	Gap	0	1.00 (0.90–1.00)	1.00 (0.90–1.00)
		1	1.00 (0.90–1.00)	0.90 (0.69–0.98)
		≥2	1.00 (0.90–1.00)	0.95 (0.76–0.99)
	No gap	0	1.00 (0.90–1.00)	1.00 (0.90–1.00)
		1	1.00 (0.90–1.00)	1.00 (0.90–1.00)
		≥2	1.00 (0.90–1.00)	1.00 (0.90–1.00)

Abbreviation: CI, confidence interval.

^a Twenty records were audited for each of the 12 categories for number of visits.