Fig. 3
From: Discovering associations between adverse drug events using pattern structures and ontologies
Statistical significance of the distribution of extracted ADE associations in Experiment 3 within the patient population. The ratio in each cell of Fig. 2 was compared to its expected value assuming a proportional distribution of ATC classes in the right-hand side. Empty cells indicate that the difference between the observed and expected ratios is not significant (p>0.001, Z-test). Other cells show the difference between the observed and expected ratios, and this difference is significant (p<0.001, Z-test). p-values where computed using a standard normal table, assuming normal distributions centered on expected ratios