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Table 3 Number of nosocomial influenza cases analyzed by Poisson regression

From: Effect of a multimodal strategy for prevention of nosocomial influenza: a retrospective study at Grenoble Alpes University Hospital from 2014 to 2019

  IRR 95% confidence interval p value
Unita
- Non-risk unit 1
- Risk unit 1.13 0.64–2.00 0.681
Epidemic seasonb
- 2014–2015 1
- 2015–2016 1.17 0.63–2.16 0.619
- 2016–2017 0.96 0.55–1.67 0.881
- 2017–2018 1.18 0.70–2.00 0.540
- 2018–2019 1.52 0.91–2.56 0.111
Risk unit * epidemic seasonc
- Risk unit * 2014–2015 1
- Risk unit * 2015–2016 0.56 0.23–1.34 0.191
- Risk unit * 2016–2017 0.39 0.19–0.81 0.011
- Risk unit * 2017–2018 0.50 0.24–1.03 0.060
- Risk unit * 2018–2019 0.48 0.23–0.97 0.042
Total number of influenza cases 1.07 1.06 – 1.07 < 0.0001
  1. Table presents the number of nosocomial influenza cases analyzed by Poisson regression over the 5 epidemic seasons considered from 2014 to 2019, at Grenoble Alpes University Hospital
  2. Bold is used to highlight statistically significant results
  3. IRR incidence rate ratio
  4. aFor the reference season 2014/2015
  5. bFor the non-risk units
  6. cInteraction term