Summary of associations of gene targets with different groupings of isolates based on the Pearson Chi-square value (χ2) and the odds ratio (OR).

<p>Empty cells mean no significant association.</p><p>^a Chi-square value. Asterisks indicate the level of significance</p><p>*** is P<0.001</p><p>** is 0.001</p><p>* is 0.01</p><p>^b Odds-ratio (OR) and 95% confidence interval (CI).</p><p>^c One quadrant of the 2x2 contingency table contains a zero. For calculation of the odds-ratio the zero is replaced by 1. The given odds ratio value is the minimal value for that specific gene. No confidence interval is calculated.</p><p>^d No statistics were calculated because variable (gene) is a constant (i.e. does not occur among <i>eae</i>-negative isolates).</p><p>Summary of associations of gene targets with different groupings of isolates based on the Pearson Chi-square value (χ2) and the odds ratio (OR).