Skip to main content

Table 2 Bivariate association between chromosomal forms and climate and environmental parameters arising from multinomial regression model.

From: Spatial distribution of the chromosomal forms of anopheles gambiae in Mali

Parameters Savanna OR (95% CI) Bamako OR (95% CI) Hybrids OR (95% CI) p-value (AIC)
Agro-ecological zones (AEZ)     
   Guinea savanna 1.00 1.00 1.00 < 0.001
   Sudan savanna 0.91 (0.84–0.98) 0.87 (0.80–0.94) 1.42 (1.23–1.63)  
   Sahel 0.30 (0.26–0.33) 1.03 (0.94–1.12) 0.73 (0.61–0.88)  
Distance to water bodies     
   < 4 km 1.00 1.00 1.00 < 0.001
   4 – 10 km 0.59 (0.55–0.63) 1.10 (1.03–1.18) 0.39 (0.34–0.44)  
   >10 – 20 km 0.95 (0.87–1.05 0.80 (0.72–0.89) 0.76 (0.65–0.89)  
   > 20 km 0.32 (0.25–0.42) 0.22 (0.15–0.30) 0.32 (0.21–0.49)  
Land use     
   Savanna 1.00 1.00 1.00 < 0.001
   Crop/Grass/Mosaic land 0.34 (0.31–0.37) 1.20 (1.12–1.29) 0.60 (0.52–0.69)  
   Others 0.09 (0.07–0.13) 0.10 (0.07–0.14) 0.35 (0.25–0.49)  
Suitability to transmission     
   Not suitable 1.00 1.00 1.00 < 0.001
   Suitable 4.44 (4.14–4.76) 1.67 (1.57–1.78) 2.90 (2.60–3.24)  
Rainfall     
   Measure_1 1.06 (1.03–1.10) 1.00 (0.96–1.03) 1.23 (1.18–1.29) <0.001 (58461.76)
   Measure_2 1.60 (1.55–1.65) 0.99 (0.96–1.03) 1.31 (1.24–1.37) <0.001 (57481.14)
   Measure_3 1.32 (1.28–1.36) 0.99 (0.96–1.03) 1.29 (1.23–1.35) <0.001 (58134.34)
   Measure_4 1.87 (1.81–1.93) 1.07 (1.04–1.11) 1.51 (1.44–1.59) <0.001 (56806.59)
NDVI     
   Measure_1 2.09 (2.02–2.17) 1.13 (1.09–1.16) 1.71 (1.62–1.81) <0.001 (56443.11)
   Measure_2 2.69 (2.59–2.79) 1.24 (1.20–1.28) 1.73 (1.63–1.83) <0.001 (55413.54)
   Measure_3 2.45 (2.36–2.54) 1.18 (1.15–1.22) 1.75 (1.65–1.85) <0.001 (55830.97)
   Measure_4 2.81 (2.70–2.92) 1.19 (1.15–1.23) 1.80 (1.70–1.91) <0.001 (55171.33)
Temperature     
   Mean minimum 0.995(0.984–0.987) 0.995(0.994–0.996) 0.992(0.990–0.994) <0.001
   Mean maximum 0.981(0.980–0.983) 0.993(0.992–0.994) 0.985(0.984–0.987) <0.001
SWS 28.79 (23.59–35.14) 2.15 (1.67–2.77) 7.57(5.39–10.63) <0.001
  1. Odds ratios are relative to Mopti chromosomal form.