OBJECTIVE To examine the potential relationship between physical therapy (PT) treatment outcomes and chronicity of low back pain (LBP) in the outpatient setting. DESIGN Retrospective observational study SETTING: Outpatient physical therapy clinics across 11 states PARTICIPANTS: 11941 patients with LBP provided physical therapy services and discharged from care between January 1, 2017 to December 31, 2018 MAIN OUTCOME MEASURE: Focus on Therapeutic Outcome (FOTO) Low Back Functional Status (FS) Patient-Reported Outcome Measure (PROM) was the primary outcomes measure used. It assesses the patients' perceived physical abilities for patients experiencing low back pain impairments. It determined a functional score on a linear metric ranging from 0 (low functioning) to 100 (high functioning). The difference in score between the intake FS and final FS score produced the FS change which represented the overall improvement of the episode of care. RESULTS The mean FS change was 16.997 (n=11945). Patients with chronic symptoms (> 90 days duration) had an FS change of 15.920 (n=7264) across 14.63 visits. Patients with subacute symptoms (15-90 days) had an FS change of 21.66 (n=3631) across 14.05. Patients with acute symptoms (0-14 days) had an FS change of 29.32 (n=1050) across 13.66 visits. Stepwise regression analysis revealed a significant beta for chronicity (-4.155) with all models. CONCLUSIONS Overall, this study shows patients experiencing shorter duration of LBP symptoms prior to starting a physical therapy episode of care experience significantly better outcomes than patients who waited. Furthermore, the number of treatment session and duration of care was similar between groups, indicating potential ineffective or insufficient care was provided for patients with chronic pain.

中文翻译：

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慢性腰痛对门诊物理治疗患者预后的影响：一项回顾性观察研究

目的检查门诊环境中物理治疗 (PT) 治疗结果与慢性腰痛 (LBP) 之间的潜在关系。设计 回顾性观察研究 设置：11 个州的物理治疗门诊 参与者：11941 名 LBP 患者在 2017 年 1 月 1 日至 2018 年 12 月 31 日期间提供物理治疗服务并出院 主要结果测量：关注治疗结果 (FOTO) 腰背功能状态 (FS) 患者报告的结果测量 (PROM) 是使用的主要结果测量。它评估患者对腰痛障碍患者的感知身体能力。它确定了一个线性指标的功能评分，范围从 0（低功能）到 100（高功能）。摄入 FS 和最终 FS 得分之间的得分差异产生了 FS 变化，这代表了护理事件的整体改善。结果 平均 FS 变化为 16.997 (n=11945)。具有慢性症状（> 90 天持续时间）的患者在 14.63 次就诊中的 FS 变化为 15.920（n=7264）。具有亚急性症状（15-90 天）的患者在 14.05 期间的 FS 变化为 21.66（n=3631）。具有急性症状（0-14 天）的患者在 13.66 次就诊中的 FS 变化为 29.32（n=1050）。逐步回归分析揭示了所有模型的慢性病 (-4.155) 的显着 Beta。结论 总体而言，这项研究表明，在开始物理治疗之前，出现 LBP 症状持续时间较短的患者，其结果明显优于等待患者。此外，