Table 4.

Autoregressive model for use of tracer medications per month in each intervention intensive care unit measured in defined daily doses per 1000 patient days.

Unit	Variable	Baseline level	Baseline trend	Change in level (standard error)	p-value	Change in trend (standard error)	p-value
TNICU
	H2 blockers	611	−8	48 (107)	0.66	10 (15)	0.52
	Proton pump inhibitors	194	10	−113 (114)	0.33	−2 (17)	0.91
MSICU
	H2 blockers	329	1	−82 (53)	0.14	3 (8)	0.75
	Proton pump inhibitors	924	−8	301 (151)	0.061	4 (21)	0.86

TNICU, trauma and neurosurgery intensive care unit; MSICU, medical surgical intensive care unit.