Seroepidemiology of Toxoplasma gondii infection in drivers involved in road traffic accidents in the metropolitan area of Guadalajara, Jalisco, Mexico

Table 2 Multivariate analyses on the risk of traffic accidents: two forward stepwise binary logistic regression models*

Subset	Beta	SE	Wald	df	OR	95% CI	p value
Model 1: All participants (n = 323)
Age	−0.242	0.107	5.090	1	0.785	0.636 – 0.969	0.024
IgG anti-T. gondii titers	0.002	0.001	3.992	1	1.002	1.000 – 1.004	0.046
Constant	0.425	0.275	2.379	1	1.529		0.123
Model 2: Excluding the age group 40 – 49 years (n = 249) **
Age	−0.244	0.115	4.477	1	0.783	0.625 – 0.982	0.034
IgG anti-T. gondii titers	0.003	0.001	5.107	1	1.003	1.000 – 1.005	0.024
Constant	0.409	0.277	2.180	1	1.505		0.140

CI = Confidence interval, df = Degrees of freedom, OR = Odds ratio, SE = Standard error.
* Adjusted for sex, marital status, educational level and economical activity.
** A second multivariate model was constructed after excluding the age stratum 40–49 years (n = 74), due to an unexpected low frequency of seropositive cases in this group. The second model crossed the new p value of 0.025 after Bonferroni correction.

ISSN: 1756-3305