Reliability and Validity of the Korean Version of Foot and Ankle Disability Index.

The Foot and Ankle Disability Index (FADI) is one of the most commonly used tools for evaluating foot and ankle function. Due to the lack of a Korean version for properly evaluating Koreans, it was not possible to compare Korean data with data from other countries using FADI. Therefore, we created a Korean version of the FADI questionnaire and evaluated its reliability and validity. We translated the English version of FADI and FADI-sport into Korean and then back into English. The Korean version of the FADI and FADI-sport, the previously verified visual analog scale (VAS) score, and the previously validated Medical Outcomes Study Short-Form 36-item questionnaire (SF-36) were administered to outpatients with chronic foot and ankle pain. A total of 64 patients who visited the outpatient clinic for chronic foot and ankle pain from January 2023 to March 2023 were included. To evaluate test-retest reliability and internal consistency, we used the intraclass correlation coefficient and Cronbach's alpha, respectively. We also assessed the concurrent and construct validity of the Korean version of FADI and FADI-sport by comparing them with the VAS and SF-36. Cronbach's alpha values were 0.953 and 0.945 for the FADI and FADI-sport, respectively, indicating good internal consistency. The reproducibility was good, and a strong correlation was observed between FADI, VAS, and SF-36. Therefore, the validation of the Korean version of the FADI was successfully performed, and it is a reliable questionnaire for self-evaluation of a patient's foot and ankle condition.

Evaluation of Contact Area and Pressure After Malreduction in Isolated Medial Malleolar Fractures With 2 mm of Displacement: A Cadaveric Study.

This study was performed to evaluate the changes in contact area and pressure in the tibiotalar joint, with a 2 mm displacement after IMMF (isolated medial malleolar fracture). Ten cadavers with pairs were used to establish a situation in which IMMF occurred during ankle injury. We performed IMMF corresponding to types C and D of the Herscovici classification, and it was displaced by 2 mm. The normal group was defined as a normal tibiotalar joint, the TF (transverse fracture) group as a 2 mm transverse displacement corresponding to the Herscovici classification type C, and the OF (oblique fracture) group as a 2 mm oblique displacement corresponding to the Herscovici classification type D. We measured the contact area and pressure at the tibiotalar joint. The film was scanned and analyzed using the digital imaging software, Scion Image (Scion Crop. Frederick, MD). In normal group, the average contact area of the tibiotalar joint was 317 mm2 (IQR; interquartile range, 256; 347) and 308 mm2 (IQR, 262; 364), average pressure was 2.19 N/mm2 (IQR, 1.94; 2.27) and 2.15 N/mm2 (IQR, 2.06; 2.53). In the TF and OF groups, the average contact area of the tibiotalar joint decreased by 9% and 12%, respectively, and the average pressure increased by 8% and 14%, respectively. There was no statistical difference in peak pressure between the normal, TF, and OF groups. In the case of transverse and oblique fractures, a 2 mm displacement showed significant changes in contact area and contact pressure compared to the normal tibiotalar joint, but there were no significant changes pertaining to type, between the 2 fractures.