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. 2025 Aug 20;12:1618493. doi: 10.3389/fmed.2025.1618493

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Copyright © 2025 Said, Kühl, Fevang, Nystad and Johansson.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Flowchart depicting disease activity states and transitions. States include Moderate Disease Activity, High Disease Activity, Low Disease Activity, Remission, and Death. Arrows indicate possible transitions between states, including loops within each state. — Illustration of the transition possibilities between the health states used in the model.