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Table 8 Factors related to the presence/absence of larvae and larval densities, adjusted by study area.

From: Highly focused anopheline breeding sites and malaria transmission in Dakar

Presence/absence of anopheline larvae (n = 293), GEE logistic regression model
Habitat characteristics Odds Ratio 95% CI p-value
    <0.001
Study areas    
Parcelles Grand Medine 1   
Pikine 1.96 0.08 – 49.21 0.682
Yarakh 2.10 0.05 – 93.07 0.702
Hann Maristes 9.19 0.35 – 238.37 0.182
Ouest Foire 13.88 0.51 – 378.05 0.119
Almadies 35.56 1.47 – 862.54 0.028
Université 46.69 1.50 – 1449.39 0.028
Habitat type    
Man-made water collections 1   
Waterproof containers 1.51 0.09 – 24.72 0.771
Canals 1.53 0.06 – 41.92 0.801
"Céanes", cemented weels or basins 3.65 0.23 – 58.63 0.360
Swamp areas, marshes, ponds or lakes 10.14 1.14 – 90.28 0.038
Ditches or puddles 33.47 4.05 – 276.48 0.001
Presence of Culicinae larvae    <0.001
No 1   
Yes 8.24 3.26 – 20.86  
Larval density (n = 86), GEE binomial regression model
Habitat characteristics Risk Ratio 95% CI p-value
    <0.001
Study areas    
Hann Maristes ref.   
Université 1.15 0.29 – 4.54 0.838
Pikine 2.00 0.86 – 4.66 0.107
Ouest Foire 5.03 2.09 – 12.53 0.001
Almadies 5.48 2.37 – 12.68 <0.001
Yarakh 10.98 1.46 – 82.75 0.020
Habitat type    
Waterproof containers ref.   
Canals 3.78 0.61 – 23.53 0.155
"Céanes", cemented weels or basins 9.53 1.08 – 83.91 0.042
Ditches or puddles 10.82 2.83 – 41.41 0.001
Swamp areas, marshes, ponds or lakes 23.29 5.16 – 105.04 <0.001
Man-made water collections 48.16 4.55 – 509.71 0.001
Water temperature    <0.001
<30°C ref.   
>= 30°C 3.13 1.67 – 5.84  
Surface vegetation (%)    0.007
<20% ref.   
>= 20% 0.36 0.17 – 0.75  
Presence of Culicinae larvae    0.019
No ref.   
Yes 2.29 1.14 – 4.60  
  1. Multivariate analysis with GEE logistic regression model or negative binomial regression model.