• Philipp Baumbach, Peter Storch, Thomas Weiss, Winfried Meissner, and Fabian Rottstädt.
• Universitätsklinikum Jena, Klinik für Anästhesiologie und Intensivmedizin, Friedrich-Schiller-Universität Jena, Am Klinikum 1, 07747, Jena, Deutschland. Philipp.Baumbach@med.uni-jena.de.
• Schmerz. 2024 Oct 9.

BackgroundInterdisciplinary multimodal pain therapy (IMPT) is an established treatment for patients with severe chronic pain. Little evidence is available on the role of treatment dosage and, in particular, on the association between the duration of IMPT and treatment outcome.AimThe aim of this retrospective study was to compare the medium-term treatment success of a short inpatient (SIT, 1 week) and a long outpatient (LOT, 4 weeks) IMPT with a comparable treatment concept and comparable therapy intensity (20 h/week) in patients with severe chronic pain.MethodsPatients in both groups completed the German Pain Questionnaire at the beginning and end of IMPT as well as after 3 months. Primary outcome measures included pain-related impairment and average pain intensity at follow-up in patients of comparable sex, age as well as pain intensity and impairment at the beginning of the therapy.ResultsWhile both groups initially showed significant treatment effects in pain-related impairment and average pain intensity, LOT patients (n = 32) reported significantly better values in both variables at 3‑month follow-up compared with SIT patients (n = 32). This was due to sustained positive effects in LOT patients and worsening in the SIT group.ConclusionThe results indicate that initial treatment effects can be observed in both treatment settings, but a longer duration of therapy seems to favour the long-term stability of treatment effects.© 2024. The Author(s).

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