Τετάρτη 26 Ιουλίου 2017

Functional Independence Measure - Minimum Data Set Motor Item Bank: Short Forms Development and Precision Comparison in Veterans

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Publication date: Available online 26 July 2017
Source:Archives of Physical Medicine and Rehabilitation
Author(s): Chih-Ying Li, Sergio Romero, Annie N. Simpson, Heather S. Bonilha, Kit N. Simpson, Ickpyo Hong, Craig A. Velozo
ObjectiveTo improve the practical use of the short forms (SFs) developed from the item bank, we compared the measurement precision of the 4- and 8-item SFs generated from a motor item bank composed of the Functional Independence Measure (FIM™) and the Minimum Data Set (MDS).DesignThe FIM-MDS motor item bank allowed scores generated from different instruments to be co-calibrated. The 4- and 8-item SFs were developed based on Rasch analysis procedures. This paper compared person strata, ceiling/floor effects, test standard error (SE) plots for each administration form and examined 95% confidence interval (CI) error bands of anchored person measures with the corresponding SFs. We used 0.3 SE as a criterion to reflect a reliability level of 0.90.SettingVeterans’ inpatient rehabilitation facilities and community living centers.Participants2500 Veterans who had both FIM and the MDS data within 6 days during years 2008 through 2010.InterventionsNAMain Outcome Measure(s)4- and 8-item SFs of FIM, MDS and FIM-MDS motor item bank.ResultsSix SFs were generated with 4- and 8-items across a range of difficulty levels from the FIM-MDS motor item bank. The three 8-item SFs all had higher correlations with the item bank (r=0.82∼0.95), higher person strata and less test error than the corresponding 4-item SFs (r=0.80∼ 0.90). The three 4-item SFs did not meet the criteria of SE less than 0.3 for any theta values.Conclusions8-item short forms could improve clinical use of item bank composed of existing instruments across the continuum of care in Veterans. We also found number of items, not test specificity, determines the precision of the instrument.



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