{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T14:40:36Z","timestamp":1753886436294,"version":"3.32.0"},"reference-count":14,"publisher":"Wiley","issue":"23","license":[{"start":{"date-parts":[[2004,11,8]],"date-time":"2004-11-08T00:00:00Z","timestamp":1099872000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Statistics in Medicine"],"published-print":{"date-parts":[[2004,12,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Associated movements (AMs) are a classical diagnostic tool to assess differences between normal children and children with some motor dysfunction. This paper presents a methodology to produce age\u2010 and gender\u2010dependent reference\u2010curves for AMs of normal children, for various tasks of a test battery. Data available consist of separate ratings of duration and extent of AMs, which are ordinal quantities with few levels. Other problems are severe age\u2010 and gender\u2010dependent floor\u2010effects (as well as some ceiling\u2010effects), leaving little information for analysis at older ages. To get a better scale, we combined the two ordinal ratings into one meaningful and quasi\u2010continuous quantity referred to as intensity of AMs. In order to solve problems due to floor\u2010effects, ceiling\u2010effects and discreteness, we assumed left\u2010 , right\u2010 and interval\u2010censored values, respectively. We considered a censored regression problem and postulated a truncated normal distribution for the non\u2010censored values (after an appropriate transformation of the data). Using Wei and Tanner's poor man's data augmentation algorithm, together with the technique of linear mixed effects modelling, useful reference\u2010curves could be produced. In contrast to the cumulative probabilities approach for ordinal data, our methodology allows the calculation of individual age\u2010 and gender\u2010standardized values, which puts us in a position to investigate numerous scientific questions. Copyright \u00a9 2004 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/sim.1914","type":"journal-article","created":{"date-parts":[[2004,11,12]],"date-time":"2004-11-12T18:43:07Z","timestamp":1100284987000},"page":"3641-3653","source":"Crossref","is-referenced-by-count":13,"title":["Modelling neuromotor ratings with floor\u2010effects"],"prefix":"10.1002","volume":"23","author":[{"given":"Theo","family":"Gasser","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Valentin","family":"Rousson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,11,8]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-8749.2001.tb00740.x"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.2307\/2532387"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0011-393X(96)80036-1"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1023\/A:1008938326604"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1080\/00401706.1979.10489811"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1080\/01621459.1987.10478458"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/9780470316696"},{"volume-title":"Continuous Univariate Distributions","year":"1970","author":"Johnson NL","key":"e_1_2_1_9_2"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.2307\/2531393"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1080\/01621459.1993.10476321"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0006-341X.2000.00376.x"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.2307\/2529876"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1023\/A:1011334721264"},{"key":"e_1_2_1_15_2","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1111\/j.2517-6161.1980.tb01109.x","article-title":"Regression models for ordinal data (with discussion)","volume":"42","author":"McCullagh P","year":"1980","journal-title":"Journal of the Royal Statistical Society, Series B"}],"container-title":["Statistics in Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fsim.1914","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/sim.1914","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,12,20]],"date-time":"2024-12-20T00:04:48Z","timestamp":1734653088000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/sim.1914"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2004,11,8]]},"references-count":14,"journal-issue":{"issue":"23","published-print":{"date-parts":[[2004,12,15]]}},"alternative-id":["10.1002\/sim.1914"],"URL":"https:\/\/doi.org\/10.1002\/sim.1914","archive":["Portico"],"relation":{},"ISSN":["0277-6715","1097-0258"],"issn-type":[{"type":"print","value":"0277-6715"},{"type":"electronic","value":"1097-0258"}],"subject":[],"published":{"date-parts":[[2004,11,8]]}}}