The comprehensive lower limb amputee socket survey: Reliability and validity of the persian version

Abstract

Background: The Comprehensive Lower limb Amputee Socket Survey (CLASS) is a self-reported measure developed to assess prosthetic socket fit in individuals with lower limb amputation. Objective: To assess the reliability and validity of the Persian version of the CLASS. Study Design: Cross-sectional and repeated-measures. Methods: We evaluated the translation and back translation of the CLASS and made the required changes according to expert committee feedback. Then, we recruited 124 participants with unilateral lower limb amputation (89.5% men). Internal consistency was analyzed with Cronbach’s alpha and test–retest reliability using intra-class correlation coefficients. Convergent construct validity was assessed by comparing the CLASS scores with the Persian version of the Trinity Amputation and Prosthesis Experience Scales (TAPES) scores. In addition, known groups construct validity was assessed by comparing CLASS scores between groups with different causes and levels of amputation. Results: Cronbach’s alpha coefficient represented a very good internal consistency for all domains of the Persian CLASS (ranged from 0.86 to 0.92). The intra-class correlation coefficient for test–retest reliability for the Persian CLASS was good to excellent (ranged from 0.73 to 0.97). There was a significant correlation between the subscales of the Persian CLASS and satisfaction subscales of the Persian TAPES ( p < 0.001). There was no significant difference between the Persian CLASS scores by cause or level of amputation. Conclusion: The Persian CLASS is a reliable and valid measure for evaluating prosthetic socket fit.

Design and evaluation of a prosthetic socket for a patient with diabetic‐related transtibial amputation: A case report

“…A study on the importance of prosthetic socket fit in individuals with lower‐limb amputation showed that the overall satisfaction of participants in stability, suspension, comfort, and appearance of the socket was 70.1%, 70.54%, 69.21%, and 58.13%, respectively 8 . It is interesting to note that in all four domains of CLASS, the studied patient was more satisfied with socket B. Rouhani et al showed that satisfaction was 69.21% with the socket comfort in 124 individuals with lower‐limb amputation, 8 a bit higher than that of our patient with socket A (62%). However, while using socket B, the level of comfort was 100%, showing a significant increase compared to socket A.…”

“…To assess the prosthetic socket satisfaction, the patient was asked to fill out the Persian version of the Comprehensive Lower‐limb Amputee Socket Survey (CLASS). 8 This questionnaire consists of 15 items in four domains of stability, suspension, comfort, and appearance. In this questionnaire, the prosthetic socket fit was evaluated while the patient was sitting, walking, going up stairs, and wearing tight pants.…”

“…To assess the prosthetic socket satisfaction, the patient was asked to fill out the Persian version of the Comprehensive Lower‐limb Amputee Socket Survey (CLASS) 8 . This questionnaire consists of 15 items in four domains of stability, suspension, comfort, and appearance.…”

Moisture mitigation using a vented liner and a vented socket system for individuals with transfemoral amputation

“…A higher score corresponds to less perceived sweat on the skin. The Comprehensive Lower Limb Amputee Socket Survey (CLASS) is a self-report measure of prosthetic socket satisfaction that quantifies suspension, stability, comfort 19 . The scale is 1–4, from strongly disagree to strongly agree, 0 is not applicable.…”

Clinical Outcome of Transfemoral Direct Socket Interface (Part 2)

“…12 The heterogeneity of intervention, study population, and outcome measures make metaanalysis impossible. 3,12,14,15 The TF socket interface, considered the most important part of the prosthesis, allows the user to control the prosthesis and provides pelvic stabilization during loading. The ischial ramus containment (IRC) socket claims to feature a "bony lock" believed to be most effective during full stance phase.…”