The compact size of the device and its ease of use made it possible for the electronic diaries to be carried around and used in the patients' everyday life setting. This was an early example of electronic patient-reported outcomes (ePRO).
The compact design and user-friendliness of the device allowed electronic diaries to be taken with patients everywhere, facilitating their use in daily life. This marked an early example of using electronic patient-reported outcomes (ePRO).