Associations of ePRO participation with AEs. (A) Bar graph showing the rate of total AEs, hospitalizations, and ER visits in the control and study groups. Data show the rate per 100 person days. (B) RR between control versus study groups was calculated using the Poisson regression model and plotted with 95% CIs in the forest plot. AEs, adverse events; ePRO, electronic patient-reported outcomes; ER, emergency room; RR, rate ratio.