{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T22:42:34Z","timestamp":1785796954929,"version":"3.56.0"},"reference-count":53,"publisher":"Oxford University Press (OUP)","issue":"11","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>The Activity Measure for Post-Acute Care (AM-PAC) is a generic metric of patient-reported functional status. The minimal clinically important difference (MCID) in the AM-PAC score has not been determined.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>The study objective was to determine the MCID for AM-PAC in people with low back pain.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>This was a retrospective cohort study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Anchor-based and distribution-based methods were used to estimate the MCID. The Modified Low Back Pain Disability Questionnaire was used as the anchor. Adults who had a primary ICD-9 code for low back pain in at least 1 outpatient physical therapist visit during an episode of care and who completed both the AM-PAC and the Modified Low Back Pain Disability Questionnaire in at least 2 visits during the care episode were included. The MCID was calculated for the AM-PAC basic mobility version as well its adapted version, which the Cleveland Clinic uses for patients 65 years old or older.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 1,271 participants were eligible for study. For the AM-PAC basic mobility version, anchor-based methods yielded MCID estimates of between 3.4 and 5.1, whereas distribution-based methods yielded estimates of 1.7 to 4.2. The minimal detectable change (MDC) for the AM-PAC basic mobility version was 3.3. For the adapted AM-PAC basic mobility version, the MCID was estimated to be between 2.9 and 4.0 via anchor-based methods and between 1.2 to 3.5 via distribution-based methods. The MDC for the adapted AM-PAC basic mobility version was 3.5.<\/jats:p><\/jats:sec><jats:sec><jats:title>Limitations<\/jats:title><jats:p>The estimated MCID was designed for people with low back pain only.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The MCID ranged from 3.3 to 5.1 for the AM-PAC basic mobility version and 3.5 to 4 for the adapted version, with the MDC as the lower limit. Changes in the AM-PAC for people with low back pain may be interpreted using the estimated MCID. Future studies are needed to determine the AM-PAC MCID for populations other than those with low back pain.<\/jats:p><\/jats:sec>","DOI":"10.1093\/ptj\/pzx083","type":"journal-article","created":{"date-parts":[[2017,8,15]],"date-time":"2017-08-15T03:11:19Z","timestamp":1502766679000},"page":"1094-1102","source":"Crossref","is-referenced-by-count":15,"title":["Minimally Clinically Important Change in the Activity Measure for Post-Acute Care (AM-PAC), a Generic Patient-Reported Outcome Tool, in People With Low Back Pain"],"prefix":"10.1093","volume":"97","author":[{"given":"Natalie","family":"Lee","sequence":"first","affiliation":[{"name":"N. Lee, MD, MPH, Medicine Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas R.","family":"Thompson","sequence":"additional","affiliation":[{"name":"N.R. 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