Odds ratio analysis for the groups defined by predicted PD probability in the Thessaly sample set.

*Because we didn't have data in the nominal groups that Lesnick et al. defined (our predicted probabilities ranged from 0.328 to 0.634), we did not use the Lesnick et al. groupings. To be able to calculate odds ratios we broke the predicted probabilities into quartiles and calculated the odds ratios for each of the groups.**Wald test with 3 degrees of freedom.