Positive concordance of ORs, reflecting relative risk of traffic accident, with anti-Toxoplasma antibody titre The figure shows the exact estimation of the ORs with their 95% confidence intervals. The numbers indicate number of subjects with particular titre (NSPT) among 446 controls (numerator) and NSPT among 146 victims (denominator). Statistical significance of the two-tailed exact Cochran-Armitage test for trend with age-stratified data was p < 0.0001.
Flegr et al. BMC Infectious Diseases 2002 2:11 doi:10.1186/1471-2334-2-11