• Zachary Walston and Cherilyn McLester.
• PT Solutions Physical Therapy, Atlanta, GA.
• Spine. 2020 Apr 15; 45 (8): 534-540.

Study Design.: A retrospective observational study.ObjectiveAssess the time course of functional outcome improvements during a physical therapy (PT) episode of care for patients with low back pain. In addition, assess the impact of patient variables, such as symptom duration, on the time course of functional outcome improvements.Summary Of Background DataEarly improvement in patient-reported symptoms and functional limitations may play an important role in the eventual success of an intervention. Early improvements in pain are associated with greater improvement in disability and depression in patients with low back pain.MethodsA total 11,945 patients were included. Intake functional status (FS), FS change at discharge, predicted FS change at discharge, FS change at first progress report (FS1), duration of symptoms before treatment, and duration of PT episode of care were assessed. Pearson correlation analysis was used to assess correlation between collected variables and FS change.ResultsThe mean FS change was 16.995 units, mean FS1 was 12.024 units, total duration was 63.591 days, and duration at FS1 was 28.969 days, indicating 70.72% of FS change occurred in the first 45.45% of the episode of care. Similar results occurred in all symptom duration categories, ranging from "0 to 7 days' to "greater than 6 months' duration. Correlation analysis demonstrated that FS1 had the greatest correlation to FS. A strong correlation (r > 0.7) was demonstrated in all symptom duration categories ranging from 0.741 to 0.805.ConclusionThe results of this study yield further support for the importance of rapid functional improvements during a PT episode of care. In addition, patients demonstrated roughly two-thirds of their improvement in the first 40% of visits regardless of their symptom duration. This study may help clinicians identify a need to modify a plan of care if insufficient early improvement is observed.Level Of Evidence3.

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