Table 3 Association between high incidence episodes of upper respiratory tract infections (URTI) and occurrence of localised meningitis epidemic, Burkina Faso, 2004–2014. All models are mixed-effect logistic regression accounting for spatial data structure. The model adjusting for relative air humidity (RH) includes only 12 districts.
Crude | Adjusted for AOT, RH and month | Adjusted for AOT, RH, month and year | |
|---|---|---|---|
URTI monthly incidence rate (per 1000) | |||
<0.39 | 1 | 1 | 1 |
0.39–<0.78 | 2.25 (0.66–7.65) | 5.21 (0.61–44.04) | 3.68 (0.39–34.69) |
0.78–<1.33 | 6.85 (2.26–20.72) | 15.58 (2.01–120.67) | 20.11 (2.28–177.58) |
1.33–<2.47 | 5.15 (1.62–16.30) | 8.18 (1.02–65.57) | 16.10 (1.73–149.83) |
≥2.47 | 10.10 (3.25–31.34) | 23.94 (3.09–185.30) | 54.55 (6.00–495.63) |
Monthly mean AOT (quartiles) | |||
<0.40 | 1 | 1 | |
0.40–<0.51 | 0.89 (0.33–2.36) | 4.36 (1.04–18.25) | |
0.51–<0.66 | 1.57 (0.62–3.98) | 2.11 (0.42–10.69) | |
≥0.66 | 1.64 (0.63–4.29) | 6.10 (1.00–37.09) | |
Monthly mean RH | |||
≥40% | 1 | 1 | |
20–39.9% | 0.68 (0.26–1.74) | 1.23 (0.38–4.00) | |
<20% | 2.13 (0.61–7.47) | 0.51 (0.12–2.21) | |
Month | |||
January | 1 | 1 | |
February | 3.88 (1.04–14.54) | 3.06 (0.71–13.14) | |
March | 11.58 (2.99–44.83) | 4.62 (0.75–28.69) | |
April | 15.65 (3.23–75.78) | 3.17 (0.39–25.79) | |
May | 1.80 (0.24–13.35) | 0.22 (0.02–2.33) | |
Year * | |||
2005 | 1.97 (0.09–43.39) | ||
2006 | 171.98 (16.52–1790.36) | ||
2007 | 17.76 (1.56–201.83) | ||
2008 | 2.94 (0.25–35.06) | ||
2010 | 2.49 (0.20–30.48) | ||
2014 | 1 | ||
