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Table 1 Association between ecological determinants and zika virus infection in Goiás, Central-West region of Brazil, 2016–2018: multivariable analysis

From: Zika virus infection and microcephaly: spatial analysis and socio-environmental determinants in a region of high Aedes aegypti infestation in the Central-West Region of Brazil

Variables

Model 1

Model 2

Model 3

aIRR (95% CI)

β

SE

p-value

aIRR (95% CI)

β

SE

p-value

aIRR (95% CI)

β

SE

p-value

Sociodemographic/economic

            

 Gross domestic product per capita

1.06 (0.93–1.20)

0.058

0.070

0.376

0.98 (0.85–1.14)

 − 0.018

0.073

0.811

0.92 (0.77–1.10)

 − 0.083

0.082

0.350

 Municipal human development index

1.98 (0.60–6.48)

0.684

1.199

0.257

1.19 (0.30–4.77)

0.175

0.844

0.805

0.59 (0.11–2.99)

 − 0.522

0.490

0.527

 Gini index

0.85 (0.38–1.92)

 − 0.157

0.353

0.703

0.98 (0.48–2.02)

 − 0.016

0.362

0.811

1.24 (0.53–2.88)

0.216

0.533

0.615

 Population density

1.08 (0.99–1.17)

0.044

0.004

0.073

1.06 (0.98–1.14)

0.054

0.041

0.966

1.09 (1.07–1.10)

0.082

0.049

 < 0.001

Health

            

 Dengue fever incidence rate

    

1.04 (1.01–1.06)

0.036

0.010

0.001

1.03 (1.01–1.06)

0.033

0.045

0.003

 Chikungunya incidence rate

    

0.89 (0.48–1.62)

 − 0.120

0.274

0.696

0.99 (0.56–1.75)

 − 0.010

0.288

0.970

 Population coverage of community health agents

    

0.99 (0.84–1.18)

 − 0.004

0.087

0.962

1.05 (0.88–1.26)

0.051

0.098

0.578

 Population coverage of endemic disease control agents

    

0.80 (0.61–1.05)

 − 0.221

0.109

0.102

0.74 (0.57–0.96)

 − 0.052

0.098

0.023

Environmental

            

 Proportion of the population without access to sewage collection and treatment

        

0.95 (0.87–1.04)

0.533

0.042

0.241

 Proportion of the population living in a household with piped water

        

1.70 (0.83–3.52)

0.427

0.630

0.149

 Proportion of the population living in a garbage collection site

        

1.53 (0.46–5.06)

0.633

0.935

0.483

 Average rainfall

        

1.88 (1.35–2.61)

0.348

0.313

 < 0.001

 Building infestation index for Aedes larvae

        

1.42 (1.32–1.52)

0.345

0.050

 < 0.001

 AIC

9433.6

7752.2

6889.3

 R2

0.063

0.229

0.315

  1. Model 1: sociodemographic/economic variables
  2. Model 2: sociodemographic/economic variables + health variables
  3. Model 3: Sociodemographic/economic variables + health and environmental variables
  4. AIC Akaike information criterion; β regression coefficient; 95% CI 95% confidence interval; aIRR adjusted incidence rate ratio; SE standard error; R2 determination coefficient; *Wald test
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BMC Infectious Diseases

ISSN: 1471-2334

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