Validation and evaluation of the Russian version of the SEFAS questionnaire for assessing foot and ankle in surgically treated patients with forefoot disorders

Introduction The Self-reported Foot and Ankle Score (SEFAS) is one of the foot health assessment tools in Sweden. Validation procedures, reliability, validity, sensitivity, approval are essential for the Russian version of the questionnaire with a new language environment.The objective was to validate the Russian version of the SEFAS questionnaire and approve the tool in the Russian surgical patients with foot disorders.Material and methods The questionnaires the patients completed preoperatively included SEFAS, SF‑36, a general health survey questionnaire, and the Lower Extremity Functional Scale (LEFS). Patients were requested to  complete the SEFAS questionnaire at 2 months of surgery to assess the sensitivity of the instrument. Based on the case histories clinical researcher recorded general and physical parameters of the patients to include gender, age, socio-demographic data, nature of the foot disorder, a dorsiflexion angle of  the  first metatarsophalangeal joint. To  assess the reproducibility of  the  Russian version of the questionnaire, some patients were requested to complete the SEFAS questionnaire twice preoperatively with an interval of one day.Results The questionnaire was characterized by good internal consistency and reproducibility indicating acceptable reliability of the Russian version of SEFAS. Statistically significant correlations of varying strength were seen between the SF-36 scores and nearly all the selected questions of the SEFAS Russian version. Statistically significant correlations (moderate to weak) were observed between the LEFS total score and the selected SEFAS questions. Minimal clinically significant changes in MCID scored 3 in the assessment of clinical interpretability of the Russian version of SEFAS.Discussion The study demonstrated the reliability, validity and sensitivity of the Russian version of the SEFAS questionnaire. The questionnaire appeared to be an informative and clinically interpretable instrument for assessing foot in surgical adult patients with foot disorders.Conclusion The SEFAS questionnaire can be recommended for Russian trauma and orthopaedic practice to learn the patient's opinion of the condition.