Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA.
Department of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Phys Ther. 2021 Aug 1;101(8). doi: 10.1093/ptj/pzab084.
The purpose of this study was to link Activity Measure for Post-Acute Care (AM-PAC) Mobility and Daily Activity scales to the PROMIS Physical Function (PF) allowing for a common metric across scales.
Cross-sectional study of patients 18 years and older presenting to 1 of 8 outpatient rehabilitation clinics in southwestern Pennsylvania. Patients completed one survey with questions from the AM-PAC Daily Activity and Mobility short forms, and the PROMIS PF item bank. Using item response theory, 2 rounds of fixed-parameter calibration were performed. In the first, the AM-PAC Daily Activity and Mobility items were calibrated with 27 fixed item parameters from the PROMIS PF. Second, the AM-PAC Daily Activity items were calibrated with 11 PROMIS Upper Extremity fixed item parameters. This process uses the construct of physical function and equates AM-PAC items on the same underlying measurement scale for the PROMIS PF.
Both scales measured a wide range of functioning and demonstrated good calibration. Data were appropriate for a fixed-parameter item response theory-based crosswalk. AM-PAC Daily Activity and Mobility raw scores were mapped onto the PROMIS PF metric. AM-PAC Daily Activity scores were also mapped onto the PROMIS PF Upper Extremity metric.
Question items from the AM-PAC Daily Activity, AM-PAC Mobility, and PROMIS PF similarly measure the construct of physical function. This consistency allows for a crosswalk of AM-PAC scores onto the PROMIS PF metric.
Crosswalk tables developed in this study allow for converting scores from the AM-PAC Daily Activity and Mobility scales to the PROMIS PF metric. This will facilitate monitoring of longitudinal change in function over time and across settings.
本研究旨在将活动度量表后急性护理（AM-PAC）的移动性和日常活动量表与 PROMIS 身体机能（PF）量表联系起来，以便在各量表之间使用共同的衡量标准。
这是一项横断面研究，纳入了来自宾夕法尼亚州西南部 8 家门诊康复诊所的 18 岁及以上患者。患者完成了一项包含 AM-PAC 日常活动和移动性短表以及 PROMIS PF 项目库问题的调查。使用项目反应理论，进行了两轮固定参数校准。第一轮中，使用来自 PROMIS PF 的 27 个固定项目参数对 AM-PAC 日常活动和移动性项目进行校准。第二轮中，使用 11 个 PROMIS 上肢固定项目参数对 AM-PAC 日常活动项目进行校准。这个过程使用了身体机能的结构，并将 AM-PAC 项目与 PROMIS PF 的相同潜在测量量表进行了匹配。
两个量表都测量了广泛的功能，并表现出良好的校准。数据适合固定参数项目反应理论的转换。AM-PAC 日常活动和移动性原始分数被映射到 PROMIS PF 度量上。AM-PAC 日常活动分数也被映射到 PROMIS PF 上肢度量上。
来自 AM-PAC 日常活动、AM-PAC 移动性和 PROMIS PF 的问题项目同样测量了身体机能的结构。这种一致性允许将 AM-PAC 分数转换为 PROMIS PF 度量。
本研究中开发的转换表允许将 AM-PAC 日常活动和移动性量表的分数转换为 PROMIS PF 度量。这将有助于监测随时间和不同环境的功能的纵向变化。
