The reliability of four standardized concern for falling scales among adults with a major lower extremity amputation

Introduction More than 52.4% of people with a lower extremity amputation (PLEA) will fall at least once each year. Previously established standardized scales that evaluate a concern for falling (CFF) were developed primarily among community-dwelling older adults. The reliability of commonly used scales to evaluate a CFF among PLEA is needed. Objective To evaluate test-retest relative and absolute reliability, and agreement of the Modified Survey of Activities and Fear of Falling in the Elderly (mSAFFE), Falls Efficacy Scale - International (FES-I), Consequences of Falling (COF) Scale, Perceived Control Over Falling (PCOF) Scale, and Perceived Ability to Manage Falls (PAMF) Scale among PLEA. Design Web-based cross-sectional repeated-measures study. Setting Rehabilitation hospital. Participants Adults with a transtibial or transfemoral level amputation, who had completed a prosthetic rehabilitation program, and at minimum of 1 year using a prosthesis for ambulation were recruited after regularly scheduled appointments (N = 22, mean age +/- SD, 63.5 +/- 12.9 years). Interventions Not applicable. Main Outcome Measure(s) Initial and re-test scores on the mSAFFE, FES-I, COF, PCOF, and PAMF. Results Intraclass correlation coefficients (ICCs) demonstrated excellent relative reliability of the mSAFFE (ICC = 0.92, 95% confidence interval [CI]: 0.82-0.97), good relative reliability of the FES-I (ICC = 0.87, 95% CI: 0.70-0.94), and fair relative reliability of the COF (ICC = 0.78, 95% CI: 0.53-0.90) and PAMF (ICC = 0.73, 95% CI: 0.46-0.88) scales. The ICC value of the PCOF scale could not be validly calculated and was not further analyzed. Calculated standard error of measurement values for the mSAFFE, FES-I, COF, and PAMF scales were small in magnitude, and Bland-Altman graphs demonstrated good agreement of initial and re-test scores for all scales. Conclusion This study provides initial evidence on the suitability and reliable use of the mSAFFE, FES-I, COF, and PAMF scales within this population. Further evaluation of the validity of these scales is needed.

Automated summary

This study aimed to evaluate the reliability and agreement of commonly used scales to evaluate a concern for falling among people with lower extremity amputation (PLEA). The results demonstrated good relative reliability and agreement for the mSAFFE, FES-I, COF, and PAMF scales, providing initial evidence for their suitability in this population.