- •Few measures of function can be used longitudinally across all levels of function.
- •The Activity Measure for Post-Acute Care (AM-PAC) offers flexible administration across a broad range of function.
- •The 6-item AM-PAC Inpatient Mobility Short Form (IMSF) is widely used in hospitals.
- •Two new AM-PAC items improve measurement at very low levels of function.
- •The 8-item AM-PAC Expanded IMSF is recommended for use among patients with low function.
List of abbreviations:AM-PAC (Activity Measure for Post-Acute Care), CAT (computerized adaptive test), CFI (comparative fit index), DIF (differential item functioning), GPCM (generalized partial credit IRT model), ICU (intensive care unit), IMSF (Inpatient Mobility Short Form), IRT (item response theory), JHH (Johns Hopkins Hospital), NEAT (nonequivalent groups with anchor test), PROMIS (Patient-Reported Outcomes Measurement Information System), RMSEA (root mean square error of approximation), TLI (Tucker-Lewis Index), UPMC (University of Pittsburgh Medical Center)
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Supported by the Foundation for Physical Therapy's Center of Excellence in Physical Therapy Health Services and Health Policy Research and Training Grant.
A.J. is a founder of CREcare, LLC, which licenses and distributes the AM-PAC. He holds stock in the company and receives royalties from Boston University from license fees generated from the AM-PAC. The other authors have nothing to disclose.