Eortc MoBilE Device (EMBED)

This study is a longitudinal observational study that will investigate the feasibility of using mobile devices for the assessment of HRQoL and physical activity in adult cancer patients undergoing treatment. Patients will complete a set of patient reported outcome measures (PROMs), and wear a smartwatch (min. 10 hours per day for one week), at baseline, and at weeks 4, 8 and 12 after treatment start.

Inclusion Criteria: * Diagnosis of cancer * Age≥18 * Starting a first or new anticancer treatment within one month following enrolment * Literacy in the target language * Ability to understand and fill out questionnaires * Ability to operate a smartphone * In possession of a smartphone allowing for an internet connection and willing to use this device to submit data * Written informed consent * Life expectancy\>3 months Exclusion Criteria: * Exclusively receiving palliative care * Start of cancer-related treatment \< 1 week from time of screening * Any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule; those conditions should be assessed and discussed with the patient before enrolment in this study.