Cost-Effectiveness of an mHealth Application in Pregnancy Care

Participants in the intervention arm will use the mHealth application daily from gestational week 20 until delivery. The application will collect and analyze a range of health-related data, including self-reported symptoms, blood pressure measurements, and proteinuria test results. The application processes these data and evaluates the degree of deviation of measured values from predefined normal ranges. Each parameter is assessed on a scale of 1 to 3, with threshold values indicating increased risk established in collaboration with the study physician and in accordance with standards of care. The study physician is informed of deviations from normal values through color-coded indicators displayed within the application (without automated notifications), based on which further clinical management may be determined. Participants in the control arm will not use the mHealth application. Instead, they will monitor and record their health data according to instructions provided by their study physician and in accordance with standard care protocols and routine clinical practice. These instructions will be provided at the same time points as those used in the intervention arm, ensuring comparable follow-up throughout the study period. Participants in the control arm will be instructed to adhere consistently to the data collection and self-monitoring procedures until delivery. Importantly, this is not a medical device study, and the mHealth application is not classified as a medical device. No aspect of standard care will be withheld from any participant. All participants will continue to receive routine prenatal care and attend scheduled prenatal visits in accordance with established clinical guidelines.