Evaluating the Feasibility of Electronic Patient-Reported Outcomes for a Population Receiving Specific Health Checkups: A Pilot Study

<b>Background</b>: In recent years, electronic patient-reported outcome (ePRO) systems on electronic devices, such as smartphones, have been employed to collect patients' self-assessments and symptom reports. However, these studies were limited to younger populations and patients with severe diseases. <b>Objective</b>: This study aimed to evaluate the ease of use and response continuity of an ePRO system used by healthy middle-aged and older adults. <b>Methods</b>: This prospective observational study included participants aged 40-74 years undergoing specific health checkups. The System Usability Scale (SUS) was used to assess ePRO usability. Response continuity was evaluated by assessing EuroQol 5-Dimensional 5-Level responses once a month for up to 3 months after the health checkup date. <b>Results</b>: Eleven participants, aged 47-73 years, participated in the study. The mean SUS on the screening date was 59.1 (95% CI: 50.0-68.1; a cut-off of 70 indicated "useful"). However, only one participant failed to complete the ePRO at one and two months post-examination, and responses were obtained from all participants at three months. <b>Conclusions</b>: Due to the small sample size, usability as measured by the SUS should be interpreted descriptively. While initial onboarding appeared to be a major implementation barrier, sustained monthly ePRO reporting over 3 months was achievable among participants who completed registration with support, suggesting the conditional feasibility of response continuity in this preventive health checkup setting.