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Table 4 Results of multivariate regression analysis of predictors of T. gondii seropositivity; adjusted odds ratios (aOR) with 95% confidence limits. Model 1 – logistic model for socio-demographic and behavioral predictors; Model 2 – logistic model with an interaction effect; Model 3 – generalized additive model including vegetated land cover

From: Environmental risk factors for Toxoplasma gondii infections and the impact of latent infections on allostatic load in residents of Central North Carolina

Predictor

Model 1

Model 2

Model 3

Age (years)

1.08 (1.03, 1.14)*

1.09 (1.03, 1.15)*

1.12 (1.06, 1.17)*

Current smoking

5.74 (1.29, 25.6)*

5.16 (1.11, 23.9)*

7.68 (1.78, 33.1)*

Obesity

2.76 (0.67, 11.4)

4.67 (1.01, 21.6)*

 

Eating undercooked pork

5.68 (0.81, 39.9)

4.89 (0.71, 33.7)

10.1 (1.52, 67.7)*

Housing unit density, units/acre

1.30 (0.95, 1.77)

 

1.30 (0.92, 1.83)

Handling soil weekly

5.34 (1.37, 20.7)*

0.35 (0.03, 4.19)

 

Currently owning a cat

10.0 (1.98, 50.6)*

 

12.1 (2.86, 51.5)*

Owning an outdoor cat

 

1.07 (0.16, 7.36)

 

Interaction effect of handling soil and owning outdoor cat

 

82.2 (2.75, 2454)*

 

Two-dimensional spline function of geographic coordinates

  

p = 0.07

Vegetated land cover within 500 m weighted, IQR increase

  

3.67 (1.48, 9.08)*

  1. *p < 0.05