Table 18.8: Adverse event No adverse event (Total) Dynamic symptom 3 118 121 pattern Stable symptom 19 115 134 pattern (Total) 22 233 255 a) Estimate the prevalence of dynamic symptoms in the population. b) Estimate the risk of adverse event in the population. c) What percent of patients with dynamic symptoms had an adverse event? What percent of those with stable symptoms had an adverse event? d) Calculate the risk ratio of adverse event associated with symptom pattern. e) Calculate the odds ratio of adverse events associated with symptom pattern. Why is this OR larger/smaller than the RR calculated in (d)