The Academic Medical Center Linear Disability Score (ALDS) item bank: item response theory analysis in a mixed patient population. Export

@article{Holman, 2005, abstract = {BACKGROUND: Currently, there is a lot of interest in the flexible framework offered by item banks for measuring patient relevant outcomes. However, there are few item banks, which have been developed to quantify functional status, as expressed by the ability to perform activities of daily life. This paper examines the measurement properties of the Academic Medical Center linear disability score item bank in a mixed population. METHODS: This paper uses item response theory to analyse data on 115 of 170 items from a total of 1002 respondents. These were: 551 (55\%) residents of supported housing, residential care or nursing homes; 235 (23\%) patients with chronic pain; 127 (13\%) inpatients on a neurology ward following a stroke; and 89 (9\%) patients suffering from Parkinson's disease. RESULTS: Of the 170 items, 115 were judged to be clinically relevant. Of these 115 items, 77 were retained in the item bank following the item response theory analysis. Of the 38 items that were excluded from the item bank, 24 had either been presented to fewer than 200 respondents or had fewer than 10\% or more than 90\% of responses in the category 'can carry out'. A further 11 items had different measurement properties for younger and older or for male and female respondents. Finally, 3 items were excluded because the item response theory model did not fit the data. CONCLUSION: The Academic Medical Center linear disability score item bank has promising measurement characteristics for the mixed patient population described in this paper. Further studies will be needed to examine the measurement properties of the item bank in other populations.}, address = {Department of Neurology, Academic Medical Center, Amsterdam, The Netherlands. r.holman@amc.uva.nl}, author = {Holman, R. and Weisscher, N. and Glas, C. A. and Dijkgraaf, M. G. and Vermeulen, M. and de Haan, R. J. and Lindeboom, R.}, citeulike-article-id = {2795375}, citeulike-linkout-0 = {http://dx.doi.org/10.1186/1477-7525-3-83}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16381611}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16381611}, comment = {2-ParameterLogistic, multigroup}, doi = {10.1186/1477-7525-3-83}, issn = {1477-7525}, journal = {Health and quality of life outcomes}, keywords = {2-parameterlogistic}, posted-at = {2008-05-15 17:50:25}, priority = {2}, title = {The Academic Medical Center Linear Disability Score (ALDS) item bank: item response theory analysis in a mixed patient population.}, url = {http://dx.doi.org/10.1186/1477-7525-3-83}, volume = {3}, year = {2005} }

TY - JOUR ID - Holman, 2005 L3 - citeulike-article-id:2795375 N2 - BACKGROUND: Currently, there is a lot of interest in the flexible framework offered by item banks for measuring patient relevant outcomes. However, there are few item banks, which have been developed to quantify functional status, as expressed by the ability to perform activities of daily life. This paper examines the measurement properties of the Academic Medical Center linear disability score item bank in a mixed population. METHODS: This paper uses item response theory to analyse data on 115 of 170 items from a total of 1002 respondents. These were: 551 (55%) residents of supported housing, residential care or nursing homes; 235 (23%) patients with chronic pain; 127 (13%) inpatients on a neurology ward following a stroke; and 89 (9%) patients suffering from Parkinson's disease. RESULTS: Of the 170 items, 115 were judged to be clinically relevant. Of these 115 items, 77 were retained in the item bank following the item response theory analysis. Of the 38 items that were excluded from the item bank, 24 had either been presented to fewer than 200 respondents or had fewer than 10% or more than 90% of responses in the category 'can carry out'. A further 11 items had different measurement properties for younger and older or for male and female respondents. Finally, 3 items were excluded because the item response theory model did not fit the data. CONCLUSION: The Academic Medical Center linear disability score item bank has promising measurement characteristics for the mixed patient population described in this paper. Further studies will be needed to examine the measurement properties of the item bank in other populations. JF - Health and quality of life outcomes SN - 1477-7525 AD - Department of Neurology, Academic Medical Center, Amsterdam, The Netherlands. r.holman@amc.uva.nl TI - The Academic Medical Center Linear Disability Score (ALDS) item bank: item response theory analysis in a mixed patient population. VL - 3 KW - 2-parameterlogistic N1 - 2-ParameterLogistic, multigroup AU - Holman, R AU - Weisscher, N AU - Glas, CA AU - Dijkgraaf, MG AU - Vermeulen, M AU - de Haan, RJ AU - Lindeboom, R PY - 2005/// UR - http://dx.doi.org/10.1186/1477-7525-3-83 ER -