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Legro MW, Reiber GE, Smith DG, del-Aguila M, Larsen J, Boone D. A prosthesis evaluation questionnaire (PEQOL): prosthesis function and quality of life with a lower limb prosthesis [abstract]. [Abstract]. Abstract book / Annual Meeting. Association for Health Services Research. Meeting. 1997 Oct 15; 14P184-5.
RESEARCH OBJECTIVE: To develop a measure of prosthesis function and quality of life of persons with a lower limb amputation who use a prosthesis. STUDY DESIGN: One hundred fourteen adults who were identified from records at two Seattle hospitals and who met study criteria (had a unilateral lower limb amputation > / = 1 year, were fitted with and using a prosthesis > / = 5 dy/wk, and whose other leg was functional) were recruited to complete a questionnaire by mail with a retest one month later. Of these, 92 persons completed one questionnaire and 81 retest forms were returned. Questionnaire items had been developed based on a literature search, interviews iwth amputees, families and professionals, and pilot testing. Each question required a self-rating (0-100) of one's status over the past four weeks. Demographic and clincal information was also gathered. Validation measures were the SF-36, Profile of Mood States, short form (POMS-sf), and the Sickness Impact Profile's social interaction subscale (SIP-SI). Scale development was completed with correlational and factor analysis. PRINCIPAL FINDINGS: Ten scales were formed: 4 prosthesis scales, 2 mobility scales, 3 psychosocial scales, and 1 quality of life scale. Reliability tests: Internal consistency was high as measured by Cronbach's alphas ranged from .73 to .80 (one exception, .47); test re-test was quite stable over a month, intra class coefficients (ICC) ranged from .64 to .90. Validity tests: correlations between the 10 PEQOL scales and the 8 SF-36 subscales were examined to assess convergent and discriminant validity. Further content validity is demonstrated by the correlaton between SIP-SI and PEQOL social burden scale (r-squared = -.52) and between POMS-short form and the PEQOL quality of life scale (r-squared -.50). CONCLUSIONS: The PEQOL scales have high internal consistency and temporal stability. Further results of the analysis indicate that the scales are valid for use in discriminative and predictive testing with all groups. RELEVANCE TO CLINICAL PRACTICE AND POLICY: The PEQOL scales will assist in evaluating orthopaedic, prosthetic and rehabilitation care for lower limb amputees
