Table 3.

Summary of difference in differences analyses

Measure	Hospital A		Hospital B
	R2	β	R2	β
Allergy documentation	0.480	−8.908	0.179	−10.013
Drug omissions	0.184	1.739	0.162	−6.574
ID wristbands	0.201	29.304*	0.025	−4.555
POD lockers	0.240	16.694*	0.167	2.318

β represents the difference in difference effect.

*Signifies p<0.05.

POD, patient's own drugs.