. Author manuscript; available in PMC: 2013 Jan 14.

Published in final edited form as: Infect Control Hosp Epidemiol. 2010 Oct 28;31(12):1230–1235. doi: 10.1086/657335

TABLE 3.

Proportion of Methicillin-Resistant Staphylococcus aureus (MRSA) and Vancomycin-Resistant Enterococcus (VRE) Exposure Identified Using Different Prediction Rules

	Proportion (%) of hospital days of exposure		Proportion (%) of patients necessary to screen
Variable	MRSA	VRE	Proportion (%) of patients necessary to screen
Single variables
Hospitalization during past year
Self-reported	201.1/290.6 (69)	59.8/61.0 (98)	321/577 (56)
EMR-documented	217.1/290.6 (75)	59.8/61.0 (98)	283/585 (48)
Antibiotic use during past year
Self-reported	244.6/290.6 (84)	57.2/61.0 (94)	335/585 (57)
EMR-documented	242.8/290.6 (84)	60.0/61.0 (98)	301/585 (51)
Combination variables
Hospitalization or antibiotic use during past year
Self-reported	261.3/290.6 (90)	61.0/61.0 (100)	432/585 (74)
EMR-documented	252.4/290.6 (87)	61.0/61.0 (100)	376/585 (64)

NOTE. EMR, electronic medical record.