Simulated computerized adaptive test for patients with shoulder impairments was efficient and produced valid measures of function. Export

@article{Hart, 2006, abstract = {BACKGROUND AND OBJECTIVE: To test unidimensionality and local independence of a set of shoulder functional status (SFS) items, develop a computerized adaptive test (CAT) of the items using a rating scale item response theory model (RSM), and compare discriminant validity of measures generated using all items (theta(IRT)) and measures generated using the simulated CAT (theta(CAT)). STUDY DESIGN AND SETTING: We performed a secondary analysis of data collected prospectively during rehabilitation of 400 patients with shoulder impairments who completed 60 SFS items. RESULTS: Factor analytic techniques supported that the 42 SFS items formed a unidimensional scale and were locally independent. Except for five items, which were deleted, the RSM fit the data well. The remaining 37 SFS items were used to generate the CAT. On average, 6 items were needed to estimate precise measures of function using the SFS CAT, compared with all 37 SFS items. The theta(IRT) and theta(CAT) measures were highly correlated (r = .96) and resulted in similar classifications of patients. CONCLUSION: The simulated SFS CAT was efficient and produced precise, clinically relevant measures of functional status with good discriminating ability.}, address = {Focus On Therapeutic Outcomes, Inc., 551 Yopps Cove Road, White Stone, VA 22578, USA. dsailhart@verizon.net}, author = {Hart, D. L. and Cook, K. F. and Mioduski, J. E. and Teal, C. R. and Crane, P. K.}, citeulike-article-id = {2802034}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.jclinepi.2005.08.006}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16488360}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16488360}, comment = {124+1, shoulder scale, CAT}, doi = {10.1016/j.jclinepi.2005.08.006}, issn = {0895-4356}, journal = {Journal of clinical epidemiology}, keywords = {upperextremity-adl}, month = {March}, number = {3}, pages = {290--298}, posted-at = {2008-05-15 16:45:04}, priority = {2}, title = {Simulated computerized adaptive test for patients with shoulder impairments was efficient and produced valid measures of function.}, url = {http://dx.doi.org/10.1016/j.jclinepi.2005.08.006}, volume = {59}, year = {2006} }

TY - JOUR ID - Hart, 2006 L3 - citeulike-article-id:2802034 N2 - BACKGROUND AND OBJECTIVE: To test unidimensionality and local independence of a set of shoulder functional status (SFS) items, develop a computerized adaptive test (CAT) of the items using a rating scale item response theory model (RSM), and compare discriminant validity of measures generated using all items (theta(IRT)) and measures generated using the simulated CAT (theta(CAT)). STUDY DESIGN AND SETTING: We performed a secondary analysis of data collected prospectively during rehabilitation of 400 patients with shoulder impairments who completed 60 SFS items. RESULTS: Factor analytic techniques supported that the 42 SFS items formed a unidimensional scale and were locally independent. Except for five items, which were deleted, the RSM fit the data well. The remaining 37 SFS items were used to generate the CAT. On average, 6 items were needed to estimate precise measures of function using the SFS CAT, compared with all 37 SFS items. The theta(IRT) and theta(CAT) measures were highly correlated (r = .96) and resulted in similar classifications of patients. CONCLUSION: The simulated SFS CAT was efficient and produced precise, clinically relevant measures of functional status with good discriminating ability. IS - 3 JF - Journal of clinical epidemiology SN - 0895-4356 AD - Focus On Therapeutic Outcomes, Inc., 551 Yopps Cove Road, White Stone, VA 22578, USA. dsailhart@verizon.net EP - 298 TI - Simulated computerized adaptive test for patients with shoulder impairments was efficient and produced valid measures of function. VL - 59 SP - 290 KW - upperextremity-adl N1 - 124+1, shoulder scale, CAT AU - Hart, DL AU - Cook, KF AU - Mioduski, JE AU - Teal, CR AU - Crane, PK PY - 2006/03// UR - http://dx.doi.org/10.1016/j.jclinepi.2005.08.006 ER -