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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.