The METHIS intervention will consist of two components. The first component is a Goal-Oriented Care (GOC) Training Program for health professionals. The training program will include the concept of personalised care, methods of goal elation, implications of GOC in healthcare practice, and how METHIS platform can be used to support the application of GOC. The training will be implemented through a blended-learning, continuous education program that will be credited by Nova University of Lisbon. The second component is a GOC information system. This will be the digital platform METHIS, which will be designed to nudge clinicians to adopt a GOC and to encourage patients and caregivers to take an active role in healthcare. The investigators will adapt an existing platform that was developed for a pilot study during the COVID-19 pandemic, that promotes care coordination, optimises disease prioritisation, and patient self-management.

The control group in this trial will be the best usual care, using the standard Electronic Health Records available to the practice. Our understanding of what "best usual care" is for people with multimorbidity is informed by qualitative research in an earlier stage of this project. Our results suggest that healthcare professionals often provide disease-driven care. When faced with multiple healthcare problems, they prioritise based on 1) patient complaints; 2) which condition is less well controlled; or 3) which condition is more likely to adversely impact on patient Health Related-Quality of life. General practitioners and primary care nurses are often not familiar with the Goal-Oriented Care model. However, they already try to implement some of its principles such as identifying patient goals and supporting shared decision making.

The METHIS platform is a digital healthcare platform, supported by three databases using PostreSQL (based in relational SQL). One of the databases allows adequate internal testing before production. Another database of production (secured with unique access codes) will be created to retrieve data from the practices' and the last database for the research data, where pseudonymised production data can be analysed for research purposes. The platform is integrated (via FCCN Scientific Computation Unit of the Portuguese Fundação para a Ciência e a Tecnologia) with the Software Zoom® to allow encrypted teleconsultations, with a guarantee that each patient connection is unique. The digital platform is web-based, and it can be used in multiple devices.

Participants will be asked to fill in the SF-12 questionnaire which generates a physical component score (PCS) and a mental component score (MCS). The primary outcome will be the mean difference in the variation (delta) of the PCS of SF-12 between baseline and 12 months. The SF-12 can be filled in 2-4 minutes, and it is validated for the Portuguese population. Minimum important differences validated across large populations and multiple disease categories are a change in between 2 and 3 points from the population mean of 50.

Participants will be asked to complete the Hospital Anxiety and Depression Scale questionnaire (HADS-A and HADS-D, respectively). The investigators will calculate the mean difference in the variation (delta) in HADS-A and HADS-D between baseline and 12 months. Although HADS was designed for inpatients it was posteriorly validated in the primary care outpatient setting. A minimum important difference of 1.5 has been reported in other chronic disorders.