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Table 2 Summary of point estimates characterizing the association of malaria risk with environmental factors

From: The associations between malaria, interventions, and the environment: a systematic review and meta-analysis

 

Country

Effect measure

Rainfall indicator

Rainfall (95% CI)

Vegetation indicator

Vegetation index

Temperature indicator

Temperature

Humidity

Adigun [39]

Nigeria

OR

Decadal rainfall (mm)

0.72 (0.57, 0. 91)

NDVI

1.56 (1.21, 1.99)

   

Bennett [40]

Zambia

OR

20 days rainfall (mm)

2.04 (1.38, 3.00)

EVI

1.98 (1.48, 2.65)

   

Chirombo [41]

Malawi

OR

Mean rainfall (mm/day)

NR

  

3 months min temp (°C)

NR

 

Dhimal [46]

Nepal

RR

    

Monthly min temp (°C)

1.27 (1.12, 1.45)

0.91 (0.83, 1.00)

Diboulo [49]a (National level)

Burkina Fasso

OR

    

8 days NLST (°C)

0.81 (0.72, 0.90)

 

Diboulo [49]a (District level)

Burkina Fasso

OR

    

8 days NLST (°C)

0.82 (0.72, 0.93)

 

Giardina [42]

Senegal

OR

  

NDVI

0.91 (0.61, 1.83)

Weekly NLST (°C)

0.83 (0.53, 1.26)

 

Gosoniu [43]b

Tanzania

OR

Annual average (15–20 mm)

0.97 (0.48, 1.90)

NDVI (0.4–0.6)

1.47 (0.88, 2.45)

Annual average night temp (16–20 °C)

1.47 (0.81, 2.73)

 

Gosoniu [43]b

Tazania

OR

Annual average (20 mm)

1.43 (0.63, 3.14)

NDVI (0.6)

1.40 (0.67, 2.98)

Annual average night temp (20 °C)

1.31 (0.61, 2.81)

 

Graves [47]c (Gash Barka

Zoba)

Eritrea

NS

Monthly precipitation (mm/day)

1.00

NDVI

4.73

   

Graves [47]c (Anseba

Zoba)

Eritrea

NS

Monthly precipitation (mm/day)

1.00

NDVI

14 × 103

   

Lowe [44]

Malawi

OR

Monthly precipitation (mm/day)

NR

  

Temp estimates (°C)

NR

 

Riedel [45]

Zambia

OR

Daily rainfall estimate (mm)

1.21 (0.85, 1.68)

NDVI

1.28 (0.67, 2.73)

8 days NLST (K)

1.21 (0.77, 1.88)

 

Thomson [48]

Gambia

NS

  

NDVI

0.67

   
  1. NR not reported, NS not specified, OR odd ratio, RR risk ratio
  2. aDiboulo et al. studied environmental drivers at national and district level
  3. bGosoniu et al. studied different measures of rainfall, vegetation index and temperature indicators
  4. cGraves et al. studied environmental drivers in two different areas (Gash Barka Zoba and Anseba Zoba)