Table 4.

Agreement between actual use and self-reports based on volume of use

Site of care	6 mo period – -6 to 0 months	12 mo period – -6 to 6 months
Emergency Department
Correctly report zero use, n (%)	44 (44.0)	34 (34.0)
Correctly report some use, n (%)	8 (8.0)	9 (9.0)
Under-report volume of use, n (%)	29 (29.0)	31 (31.0)
Over-report volume of use, (%)	19 (19.0)	26 (26.0)
Agreement between claims and self-report*	0.14	0.14
Hospital
Correctly report zero use, n (%)	76 (76.0)	67 (67.0)
Correctly report some use, n (%)	7 (7.0)	12 (12.0)
Under-report volume of use, n (%)	3 (3.0)	5 (5.0)
Over-report volume of use, n (%)	14 (14.0)	16 (16.0)
Agreement between claims and self-report*	0.44	0.49
Home Health Care
Correctly report zero use, n (%)	84 (84.0)	79 (79.0)
Correctly report some use, n (%)	2 (2.0)	7 (7.0)
Under-report volume of use, n (%)	5 (5.0)	4 (4.0)
Over-report volume of use, n (%)	9 (9.0)	10 (10.0)
Agreement between claims and self-report*	0.22	0.51
Nursing Home
Correctly report zero use, n (%)	92 (92.0)	89 (89.0)
Correctly report some use, n (%)	1 (1.0)	1 (1.0)
Under-report volume of use, n (%)	1 (1.0)	2 (2.0)
Over-report volume of use, n (%)	6 (6.0)	8 (8.0)
Agreement between claims and self-report*	0.20	0.14

^*Kappa statistic