Table 4.
Results of multivariate regression analysis of the relationship between invasive pneumococcal disease rates and respiratory virus infection rates and temperature for concurrent months and 1-month lag. 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 | 1.26 (1.03–1.54) | 1.09 (0.87–1.36) | 1.16 (0.90–1.50) | 1.06 (0.80–1.42) | 1.22 (0.98–1.53) | 1.20 (0.89–1.34) | 0.92 (0.76–1.14) | 0.94 (0.74–1.21) |
| RSV | 1.15 (0.89–1.48) | 1.81 (1.36–2.41) | 1.41 (1.00–1.97) | 2.57 (1.78–3.71) | 1.12 (0.91–1.37) | 1.15 (0.90–1.48) | 1.04 (0.81–1.33) | 1.13 (0.85–1.52) |
| Adenovirus | 1.58 (0.88–2.74) | 1.32 (0.68–2.42) | 2.47 (1.38–4.53) | 1.00 (0.59–1.68) | 1.14 (0.96–1.35) | 1.10 (0.90–1.34) | 1.32 (0.96–1.83) | 1.19 (0.82–1.77) |
| Temperature >17 °C | 0.47 (0.39–0.57) | 0.56 (0.45–0.70) | 0.58 (0.44–0.77) | 0.76 (0.56–1.02) | 0.47 (0.37–0.59) | 0.54 (0.41–0.70) | 0.37 (0.31–0.44) | 0.42 (0.34–0.51) |
Abbreviations: IRR Incidence rate ratio, CI Confidence interval RSV respiratory syncytial virus
aConcurrent month
bPreceding month