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Table 3 Results of bivariate regression analysis between invasive pneumococcal disease rates and respiratory virus infection rates and temperature for concurrent months and 1-month lag. Catalonia, 2006–2012

From: Invasive pneumococcal disease rates linked to meteorological factors and respiratory virus circulation (Catalonia, 2006–2012)

Variable All ages <5 years 5–64 years ≥65 years
  No laga 1-month lagb No laga 1-month lagb No laga 1-month lagb No laga 1-month lagb
  IRR (95 % CI) IRR (95 % CI) IRR (95 % CI) IRR (95 % CI) IRR (95 % CI) IRR (95 % CI) IRR (95 % CI) IRR (95 % CI)
Influenza 2.13 (1.71–2.63) 1.85 (1.46–2.33) 1.86 (1.44–2.39) 1.59 (1.22–2.07) 2.08 (1.69–2.57) 1.84 (1.47–2.31) 1.37 (1.03–1.83) 1.29 (0.96–1.74)
RSV 2.41 (1.78–3.22) 2.94 (2.21–3.87) 2.49 (1.76–3.48) 3.22 (2.31–4.47) 1.82 (1.45–2.29) 1.76 (1.40–2.24) 1.59 (1.13–2.30) 1.66 (1.19–2.40)
Adenovirus 3.47 (1.39–7.30) 3.44 (1.37–7.25) 4.43 (2.25–8.61) 1.62 (0.85–2.89) 1.14 (0.88–1.47) 1.11 (0.86–1.44) 1.35 (0.85–2.30) 1.19 (0.74–2.03)
Temperature >17 °C 0.39 (0.35–0.46) 0.45 (0.37–0.55) 0.44 (0.35–0.55) 0.55 (0.43–0.71) 0.39 (0.33–0.46) 0.45 (0.37–0.55) 0.37 (0.32–0.44) 0.41 (0.34–0.49)
  1. Abbreviations: IRR Incidence rate ratio, CI Confidence interval, RSV respiratory syncytial virus
  2. aConcurrent month
  3. bPreceding month