Table 4 Association between high incidence episodes of lower respiratory tract infections (LRTI) and occurrence of localised meningitis epidemics, 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 | |
|---|---|---|---|
LRTI monthly incidence rate (per 1000) | |||
<2.98 | 1 | 1 | 1 |
2.98–<5.37 | 0.93 (0.45–1.94) | 0.78 (0.35–1.77) | 1.76 (0.61–5.07) |
5.37–<8.22 | 0.41 (0.16–1.06) | 0.25 (0.08–0.77) | 0.66 (0.17–2.66) |
8.28–<13.47 | 1.89 (0.97–3.69) | 1.05 (0.48–2.28) | 4.00 (1.35–11.89) |
≥13.47 | 1.05 (0.59–2.21) | 0.53 (0.22–1.26) | 6.68 (1.94–23.07) |
Monthly mean AOT | |||
<0.40 | 1 | 1 | |
0.40–<0.51 | 0.87 (0.33–2.32) | 4.37 (1.06–18.09) | |
0.51–<0.66 | 1.42 (0.56–3.58) | 1.93 (0.39–9.56) | |
≥0.66 | 1.68 (0.65–4.39) | 5.85 (0.99–34.40) | |
Monthly mean of RH | |||
≥40% | 1 | 1 | |
20–<40% | 0.61 (0.24–1.54) | 0.93 (0.28–3.05) | |
<20% | 1.94 (0.58–6.53) | 0.52 (0.12–2.30) | |
Month | |||
January | 1 | 1 | |
February | 4.16 (1.11–15.53) | 3.01 (0.71–12.65) | |
March | 11.37 (2.94–43.89) | 5.13 (0.84–31.18) | |
April | 14.23 (3.01–67.16) | 4.18 (0.53–33.12) | |
May | 1.43 (0.20–10.44) | 0.29 (0.03–3.00) | |
Year* | |||
2005 | 2.10 (0.10–45.98) | ||
2006 | 173.33 (16.18–1856.81) | ||
2007 | 17.53 (1.50–204.51) | ||
2008 | 3.34 (0.28–40.48) | ||
2010 | 1.88 (0.15–22.91) | ||
2014 | 1 | ||
