Table 2.

Hand Hygiene Frequency by Unit During Baseline and Intervention Periods, January 2012–March 2013

Unit	Hand Hygiene Events per Patient-Hour
Inpatient Areas	Baseline Period January 2012–June 2012	Intervention Period October 2012–March 2013	Difference*
Childbirth	1.12	1.26	0.14
Critical Care	3.47	3.98	0.51
Joint Center	1.17	1.36	0.19
Medical/Surgical 1	1.27	1.32	0.05
Medical/Surgical 2	1.39	1.58	0.19
Psychiatry	0.21	0.22	0.01
Step-down	0.85	1.06	0.21
Telemetry	1.49	1.56	0.07
	Hand Hygiene Events per Patient-Visit
Outpatient Areas	Baseline Period	Intervention Period	Difference†
Computerized Tomography	7.51	7.17	-0.34
Emergency	10.05	9.63	-0.42
Endoscopy	7.11	7.96	0.85
Lab/Phlebotomy	0.62	0.86	0.24
Magnetic Resonance Imaging	5.08	6.89	1.81
Mammography	0.95	1.20	0.25

^*Median difference, 0.17 events/patient-hour; interquartile range, 0.14; Wilcoxon signed rank test, p = .008.

^†Mean difference, 0.40 events/patient-visit; standard deviation, 0.83; paired t-test, p = .29.