Table 1.

Comparison of Household Reported Annual Utilization with Medicare Claims Records, Matched Sample, 2001–2003

	Mean
	Claims	MEPS	Ratio of MEPS/Claims Means	κ Statistic	Mean Agreement Rate†	Lin's Concordance Statistic
Hospital stays
Any hospital stay	0.20	0.20	1.02	0.89	0.96	—
	(0.01)	(0.01)	(0.02)	(0.01)	(0.004)	—
Number of stays	0.31	0.29**	0.95	—	—	0.89
	(0.01)	(0.01)	(0.02)	—	—	(0.01)
Number of nights	1.40	1.42	1.01	—	—	0.88
	(0.10)	(0.09)	(0.03)	—	—	(0.02)
Emergency department (ED) visits
Any ED visit	0.19	0.15***	0.79	0.76	0.93	—
	(0.01)	(0.01)	(0.03)	(0.02)	(0.05)	—
Number of ED visits	0.32	0.21***	0.66	—	—	0.51
	(0.03)	(0.01)	(0.05)	—	—	(0.10)
Office-based visits
Any office visit	0.90	0.89	0.99	0.55	0.91	—
	(0.01)	(0.01)	(0.01)	(0.03)	(0.005)	—
Number of visits	11.28	9.15***	0.81	—	—	0.67
	(0.29)	(0.27)	(0.02)	—	—	(0.04)

Notes: All estimates were weighted using the propensity score-derived weight for the matched sample. All standard errors and statistical tests were adjusted for the clustered and stratified design of MEPS using the method of balanced repeated replication, which also accounts for lower levels of clustering at the household and individual level.

Standard errors in parentheses.

^*p<.10

^**p<.05, and

^***p<.01 for difference between MEPS and claims measures of utilization.

n=4,045.

^†Agreement=1 if both claims and MEPS agree; 0 otherwise.

MEPS, Medical Expenditure Panel Survey.