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Table 3 Results of overdispersed Poisson log-linear regression evaluating seasonal incidence of methicillin-resistant Staphylococcus aureus, Stenotrophomonas maltophilia, Achromobacter xylosoxidans and Haemophilus influenzae acquisition among young U.S. children with cystic fibrosis, 2003 to 2009

From: Seasonality of acquisition of respiratory bacterial pathogens in young children with cystic fibrosis

  Respiratory Pathogen
MRSA S. maltophilia A. xylosoxidans H. influenzae
IRR (95% CI) IRR (95% CI) IRR (95% CI) IRR (95% CI)
Winter 1.0 Referent 1.0 Referent 1.0 Referent 1.0 Referent
Spring 0.79* (0.65, 0.96) 0.91 (0.76, 1.08) 0.59* (0.39, 0.89) 0.92 (0.81, 1.04)
Summer 0.69* (0.57, 0.84) 1.05 (0.89, 1.25) 0.69 (0.47, 1.01) 0.88* (0.78, 0.99)
Autumn 0.89 (0.75, 1.07) 0.95 (0.80, 1.12) 0.80 (0.56, 1.15) 0.78* (0.69, 0.88)
  1. MRSA, methicillin-resistant Staphylococcus aureus; S. maltophilia, Stenotrophomonas maltophilia; A. xylosoxidans, Achromobacter xylosoxidans; H. influenzae, Haemophilus influenzae; IRR, incidence rate ratio; CI, confidence interval
  2. * P < 0.05