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Latham NK, Mehta V, Nguyen AM, Jette AM, Olarsch S, Papanicolaou D, Chandler J. Performance-based or self-report measures of physical function: which should be used in clinical trials of hip fracture patients? Arch Phys Med Rehabil. 2008; 89(11):2146-55. The objective of this study was to assess the validity, sensitivity to change, and responsiveness of 3 self-report and 4 performance-based measures of physical function: activity measure for post-acute care (AM-PAC) Physical Mobility and Personal Care scales, the Medical Outcomes Study 36-Item Short Form Health Survey Physical Function scale (SF-36 PF), the Physical Functional Performance test (PFP-10), the Short Physical Performance Battery (SPPB), a 4-meter gait speed, and the six-minute walk test (6MWT).
Motin M, Keren O, Ring H. Relationship between type and amount of treatment and functional improvement in first-stroke during in-patients rehabilitation. Harefuah. 2001; 140(12):1127-33, 1232. Hebrew. The effectiveness of ongoing rehabilitation services for post-acute stroke patients is poorly documented. The aim of the present study was describe the relationships between functional status at discharge and intensity of therapies, including occupational therapy, physical therapy, speech therapy and nursing care, during inpatient medical rehabilitation.
Prvu Bettger JA, Coster WJ, Latham NK, Keysor JJ. Analyzing change in recovery patterns in the year after acute hospitalization. Arch Phys Med Rehabil. 2008; 89(7):1267-75. The objective of this study was to examine trajectories of recovery and change in patterns of personal care and instrumental functional activity performance to determine whether different assessment interval designs within a 12-month period yield different estimates of improvement and decline after acute hospitalization and inpatient rehabilitation.
Siebens H, Andres PL , Pengsheng N, Coster WJ, Haley SM. Measuring physical function in patients with complex medical and postsurgical conditions: a computer adaptive approach. Am J Phys Med Rehabil. 2005; 84(10):741-8. The objective of this study was to examine whether the range of disability in the medically complex and postsurgical populations receiving rehabilitation is adequately sampled by the new Activity Measure-Post-Acute Care (AM-PAC), and to assess whether computer adaptive testing (CAT) can derive valid patient scores using fewer questions.
Tao W, Haley S, Coster W, Ni P, Jette A. An Exploratory Analysis of Functional Staging Using an Item Response Theory Approach. Arch Phys Med Rehabil. 2008; 89(6); 1046-1053. To develop and explore the feasibility of a functional staging system (defined as the
process of assigning subjects, according to predetermined standards, into a set of hierarchic levels with regard to their functioning performance in mobility, daily activities, and cognitive skills) based on item response theory (IRT) methods using short forms of the Activity Measure for Post-Acute Care (AM-PAC) and to compare the criterion validity and sensitivity of the IRT-based staging system to a non–IRT-based staging system developed for the FIM instrument.