On “A Core Set of Outcome Measures to Assess Physical Function for Adults Participating in Physical Therapist Treatment in the Hospital: A Clinical Practice Guideline.” Mayer KP, Johnson AM, Smith DJ, et al. Phys Ther . 2025;105(6):pzaf076. https://doi.org/10.1093/ptj/pzaf076

We read with great interest the recently published clinical practice guideline, “A Core Set of Outcome Measures to Assess Physical Function for Adults Participating in Physical Therapist Treatment in the Hospital: A Clinical Practice Guideline” by Meyer et al.1 We commend the authors for their substantial effort in establishing a standardized framework to guide physical therapy clinical practice and research in the hospital setting. However, we would like to respectfully emphasize important aspects of the Perme Intensive Care Unit Mobility Score (Perme Score) that were not included in the current guidelines, which may influence its clinical interpretation and application. The inclusion of the Perme Score in the clinical practice guideline (CPG) is appropriate, given its high interrater reliability (ICC = 0.94 to 0.99)1 and established utility in assessing mobility among patients who are critically ill. However, we would like to highlight some recent high-quality studies which further strengthen the evidence base for this tool which were not addressed in the current CPG discussion. We believe the inclusion of these recent studies is essential to fully contextualize the Perme Score’s clinimetric properties.