The purpose of this project was to develop the Foot and Ankle Ability Measure (FAAM), a self-reported HRQL instrument specific to those with lower leg musculoskeletal disorders. The FAAM consists of the ADL and Sports subscales. Data analysis was done in two stages. Stage I consisted of item selection based on factor loading patterns, inter-item correlations, item to total score correlations, item characteristic curves and the test information functions. 914 subjects participated in the analyses for stage I. Stage II consisted of reliability and validity testing. The data analysis plan consisted of assessing internal consistency, test re-test reliability, responsiveness to change in status, responsiveness compared to general measures of function and validity based on the correlation to concurrent measures of physical and mental functioning. There were 164 subjects in a group expected to change and 79 subjects in a group expected to remain stable. Based on the analyses in state I, 4 items were omitted from the ADL subscale. These items were related to pain and sleeping. All items on the Sports subscale were retained. Based on the analyses in stage II, the errors associated with measurement at a single point of time were +/-6.9 and +/-10 points for the ADL and Sports subscales respectively. ICC for test re-test reliability were 0.89 and 0.87 for the ADL and Sports subscales respectively. The minimal detectable change was +/-5.7 and +/-12.3 points for the ADL and Sports subscales respectively. Two-way repeated measures ANOVA and ROC analysis found both the ADL and Sports subscales were responsive to changes in status. The minimal clinically important differences were 8 and 9 points for the ADL and Sports subscales respectively. Guyatts Responsiveness Index and ROC analysis found the ADL subscale was more responsive than general measures of function while the Sports subscale was not. The ADL and Sport subscales had high correlations to SF-36 physical function subscale, physical component summary score and global rating of function and low correlations with the SF-36 mental function subscale and mental component summary score. This study provides evidence of reliability, responsiveness and validity for the FAAM ADL and Sports subscales.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-07232003-072912 |
| Date | 30 July 2003 |
| Creators | Martin, RobRoy Lee |
| Contributors | Ray G. Burdett, Stephen F. Conti, Jessie M. VanSwearingen, James J. Irrgang |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu:80/ETD/available/etd-07232003-072912/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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