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Table 5 Multivariable regression model* of variables associated with the rate of CDI cases

From: Detection of Clostridium difficile infection clusters, using the temporal scan statistic, in a community hospital in southern Ontario, Canada, 2006–2011

Variable Description IRR 95% CI P-value
Year 2006 Referent   
  2007 0.43 0.22 – 0.83 0.013
  2008 0.11 0.04 – 0.29 < 0.001
  2009 0.14 0.06 – 0.32 < 0.001
  2010 0.43 0.22 – 0.83 0.012
Season Fall Referent   
  Winter 0.81 0.36 – 1.80 0.606
  Spring 2.07 1.10 – 3.89 0.023
  Summer 1.29 0.73 – 2.29 0.379
Service Medicine1 Referent   
  Surgery 1.15 0.20 – 6.53 0.871
  Other2 0.74 0.18 – 2.95 0.667
  1. *Multivariable multilevel negative binomial regression model with a random intercept for ward.
  2. CDI = Clostridium difficile infection.
  3. IRR = Incidence rate ratio.
  4. CI = Confidence interval.
  5. 1Included the following departments: intensive care (adult and neonatal), oncology, pediatrics, and internal medicine.
  6. 2Included the following departments: psychiatry, rehabilitation, hospice, childbirth, and nursery.