{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T21:13:02Z","timestamp":1761513182579},"reference-count":30,"publisher":"The Journal of Rheumatology","issue":"11","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2012,11]]},"abstract":"<jats:sec><jats:title>Objective.<\/jats:title><jats:p>To evaluate some measurement properties of the Myositis Activities Profile (MAP) in adult patients with polymyositis (PM) and dermatomyositis (DM) in the United States.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>To assess content validity, patients with PM\/DM rated difficulty and importance of items of the MAP using a visual analog scale (VAS), range 0\u201310. For construct validity, consecutive patients with PM\/DM performed the 6-item core set for disease activity including the manual muscle test (MMT) and the Health Assessment Questionnaire (HAQ), the Functional Index-2 (FI-2; muscle endurance), and the MAP plus disease effect on well-being on a VAS. Item fit within subscales was analyzed by Cronbach\u2019s alpha. Patients with stable disease activity filled out the MAP again 1 week later.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>The median combined difficulty and importance, 0\u201310, of the 31 items was 5.00 (range 2.10\u20135.95). One item was added, giving a 32-item MAP. Correlations between the median of subscales\/single items of the MAP and the HAQ and disease effect on well-being were r<jats:sub>s<\/jats:sub> = 0.69 and r<jats:sub>s<\/jats:sub> = 0.68, respectively, with lower correlations to the MMT (r<jats:sub>s<\/jats:sub> = \u22120.35), and the FI-2 (r<jats:sub>s<\/jats:sub> = \u22120.29 to \u22120.47) and disease activity measures (r<jats:sub>s<\/jats:sub> = 0.36\u20130.41). Cronbach\u2019s alpha coefficients for the 4 subscales varied between 0.85 and 0.95. Weighted kappa coefficients (K<jats:sub>w<\/jats:sub>) ranged between 0.77 and 0.93 for the 4 subscales and between 0.74 and 0.83 for the 4 single items without systematic variations (p &gt; 0.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>This initial validation of the MAP indicates promising measurement properties for assessing limitations in activities of daily living and participation in patients with PM\/DM in the United States.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.120504","type":"journal-article","created":{"date-parts":[[2012,9,1]],"date-time":"2012-09-01T20:47:29Z","timestamp":1346532449000},"page":"2134-2141","source":"Crossref","is-referenced-by-count":15,"title":["The Myositis Activities Profile \u2014 Initial Validation for Assessment of Polymyositis\/Dermatomyositis in the USA"],"prefix":"10.3899","volume":"39","author":[{"given":"HELENE","family":"ALEXANDERSON","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ANN M.","family":"REED","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"STEVEN R.","family":"YTTERBERG","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2262","published-online":{"date-parts":[[2012,9,1]]},"reference":[{"key":"2018112909282829000_39.11.2134.1","doi-asserted-by":"publisher","DOI":"10.1053\/berh.2002.0261"},{"key":"2018112909282829000_39.11.2134.2","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2003.006122"},{"key":"2018112909282829000_39.11.2134.3","doi-asserted-by":"publisher","DOI":"10.1517\/14656560902913815"},{"key":"2018112909282829000_39.11.2134.4","doi-asserted-by":"publisher","DOI":"10.1097\/BOR.0b013e328324e700"},{"key":"2018112909282829000_39.11.2134.5","first-page":"2230","article-title":"Polymyositis and dermatomyositis: Short term and long-term outcome, and predictive factors of prognosis","volume":"28","author":"Marie","year":"2001","journal-title":"J Rheumatol"},{"key":"2018112909282829000_39.11.2134.6","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/41.1.22"},{"key":"2018112909282829000_39.11.2134.7","doi-asserted-by":"publisher","DOI":"10.1002\/art.1780380907"},{"key":"2018112909282829000_39.11.2134.8","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/keh404"},{"key":"2018112909282829000_39.11.2134.9","doi-asserted-by":"crossref","first-page":"463124","DOI":"10.5402\/2011\/463124","article-title":"Patient preference assessment reveals disease aspects not covered by recommended outcomes in polymyositis and dermatomyositis","volume":"2011","author":"Alemo Munters","year":"2011","journal-title":"ISRN Rheumatol"},{"key":"2018112909282829000_39.11.2134.10","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/40.11.1262"},{"key":"2018112909282829000_39.11.2134.11","first-page":"2386","article-title":"Development of the myositis activities profile - Validity and reliability of a self-administered questionnaire to assess activity limitations in patients with polymyositis\/dermatomyositis","volume":"29","author":"Alexanderson","year":"2002","journal-title":"J Rheumatol"},{"key":"2018112909282829000_39.11.2134.12","unstructured":"World Health Organization. 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