Table 2. The final logistic regression model for the analysis of the risk factors associated with anti-Toxocara spp. antibodies (detected by ELISA) in an adult healthy population (n=253), from January to May of 2010, Presidente Prudente, São Paulo, Brazil.
| Predictor | β | SE β | Wald's χ2 | df | P | Exp (β): odds ratio (95% CI) |
| Constant | - 3.966 5 | 0.681 3 | 33.891 9 | 1 | 0.000 0 | NA |
| Family income | 1.088 5 | 0.645 2 | 2.846 0 | 1 | 0.091 6 | 2.969 7 (0.838 5-0.517 4) |
| Contact with soil | 1.260 1 | 0.531 6 | 5.618 3 | 1 | 0.017 8 | 3.525 8 (1.243 8-9.994 7) |
| Omnibus tests of model coefficients | NA | NA | 12.000 0 | 2 | 0.002 0 | NA |
| Hosmer & Lemeshow | NA | NA | 2.087 0 | 2 | 0.352 0 | NA |
All statistics reported herein use 4 decimal places to maintain statistical precision. Cox and Snell R2=0.046; Nagelkerke R2=0.104; β: standardized regression coefficient; SE: standard error; df: degree of freedom; Exp (β): antilog β (indicates the change in the odds ratio associated with a 1 unit change in the predictor variable); NA: not applicable.