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

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

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
  1. CI = Confidence interval, df = Degrees of freedom, OR = Odds ratio, SE = Standard error.
  2. * Adjusted for sex, marital status, educational level and economical activity.
  3. ** 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.