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Table 4 Parameter estimates of bivariate and Bayesian spatio-temporal logistic models for T. trichiura infection risk in Brazil

From: Spatio-temporal distribution of soil-transmitted helminth infections in Brazil

T. trichiura infection

Bivariate logistic

Spatio-temporal model

 

OR (95% CI)

OR (95% BCI)

Survey period

  

 1995-1999

1.00

1.00

 2000-2004

1.83 (1.50; 2.23)*

3.47 (2.74; 4.40)*

 2005-2009

1.05 (0.82; 1.36)

1.66 (1.30; 2.10)*

 From 2010 onwards

0.87 (0.64; 1.17)

0.93 (0.71; 1.21)

Yearly temperature range (°C)

  

 <13

1.00

1.00

 13-18

0.19 (0.15; 0.25)*

0.34 (0.25; 0.47)*

 ≥18

0.12 (0.09; 0.17)*

0.34 (0.22; 0.53)*

Mean temperature of coldest quarter (°C)

  

 <19

1.00

1.00

 19-22

3.03 (2.25; 4.07)*

0.83 (0.61; 1.13)

 ≥22

7.97 (6.09; 10.42)*

1.42 (0.92; 2.18)

Isothermality

1.28 (1.15; 1.42)*

1.27 (1.09; 1.48)*

Precipitation seasonality

0.70 (0.64; 0.76)*

0.82 (0.68; 0.98)*

Precipitation in wettest quarter (mm)

  

 <560

1.00

1.00

 560-680

1.03 (0.74; 1.45)

1.65 (1.22; 2.24)*

 ≥680

1.72 (1.24; 2.40)*

2.11 (1.48; 3.00)*

Precipitation in warmest quarter (mm)

  

 <250

1.00

1.00

 250-440

0.62 (0.47; 0.83)*

1.50 (1.14; 1.99)*

 ≥440

0.18 (0.13; 0.24)*

2.45 (1.46; 4.11)*

Precipitation in driest month (mm)

  

 <14

1.00

1.00

 14-16

1.07 (0.70; 1.64)

1.48 (1.10; 1.97)*

 ≥16

3.21 (2.16; 4.79)*

2.00 (1.32; 3.05)*

Precipitation in coldest quarter (mm)

  

 <80

1.00

1.00

 80-300

2.04 (1.38; 3.02)*

1.13 (0.82; 1.55)

 ≥300

7.67 (5.48; 10.75)*

1.80 (1.11; 2.92)*

Soil moisture (%)

  

 <50

1.00

1.00

 50-80

1.56 (1.15; 2.13)*

0.82 (0.61; 1.09)

 ≥80

0.91 (0.54; 1.52)

0.57 (0.38; 0.86)*

Soil pH

  

 <5.35

1.00

1.00

 5.35-5.65

0.54 (0.38; 0.77)*

1.52 (1.20; 1.92)*

 ≥5.65

0.60 (0.45; 0.80)*

0.87 (0.67; 1.12)

Human development index (HDI)

0.74 (0.65; 0.84)*

1.45 (1.17; 1.79)*

Human influence index (HII)

  

 <20

1.00

1.00

 20-26

1.39 (1.01; 1.91)*

1.49 (1.20; 1.86)*

 ≥26

2.14 (1.57; 2.91)*

1.86 (1.46; 2.37)*

Rural households (%)

  

 <25

1.00

1.00

 25-50

1.01 (0.74; 1.39)

0.86 (0.68; 1.09)

 ≥50

0.61 (0.44; 0.74)*

0.66 (0.51; 0.85)*

Poor households

1.54 (1.27; 1.87)*

2.06 (1.58; 2.68)*

  

Median (95% BCI)

Temporal autocorrelation

 

-0.05 (-0.10; 0.00)

Spatial variance

 

9.68 (9.27; 10.03)

Spatial range (km)

 

32.2 (29.9; 33.9)

  1. With standard error clustered at location level.
  2. *Significant based on 95% CI or BCI.
  3. OR: odds ratio; 95% CI: lower and upper bound of a 95% confidence interval; 95% BCI: lower and upper bound of a 95% Bayesian credible interval.