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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.

From: Differential outcome of an antimicrobial stewardship audit and feedback program in two intensive care units: a controlled interrupted time series study

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