1. A computer-implemented method of analyzing a dataset of pharmacovigilance data, comprising: (a) determining a sample size-independent measure of association between two conditions of interest in the dataset of pharmacovigilance data; (b) using a hypergeometric distribution to determine a measure of statistical unexpectedness between the conditions of interest in said dataset, wherein said distribution is based on an urn model under a hypothesis that said conditions are statistically independent; and (c) displaying the measure of association with the measure of the statistical unexpectedness to identify a significant association between the conditions of interest.