Comparison of the Manchester-Oxford Foot Questionnaire (MOXFQ) and the Self-Reported Foot and Ankle Outcome Score (SEFAS) in patients with foot or ankle surgery.

BACKGROUND: Patient-reported outcome measures are a critical tool in evaluating the efficacy of orthopedic procedures. The intention of this study was to compare the psychometric properties of the Manchester-Oxford Foot Questionnaire (MOXFQ) and the Self-Reported Foot and Ankle Outcome Score (SEFAS) in patients with foot or ankle surgery. METHODS: 177 patients completed both scores and FAOS, Foot and Ankle Outcome Score (FAOS), Short Form 36 (SF-36) and numeric scales for pain and disability (NRS) before and after surgery. Test-Retest reliability, internal consistency, floor and ceiling effects, construct validity, responsiveness and minimal important change were analyzed. RESULTS: The MOXFQ and SEFAS demonstrated excellent test-retest reliability with interclass correlation coefficient values >0.9 Cronbach's alpha (α) values demonstrated strong internal consistency. No floor or ceiling effects were observed for both questionnaires. As hypothesized MOXFQ subscales correlated strongly with corresponding SEFAS, FAOS and SF-36 domains. MOXFQ subscales showed excellent responsiveness between preoperative assessment and postoperative follow-up, whereas SEFAS demonstrated moderate responsiveness. CONCLUSIONS: The MOXFQ and SEFAS demonstrated good psychometric properties and proofed to be valid and reliable instruments for use in foot and ankle patients. MOXFQ showed better outcomes in responsiveness.

Reliability, validity and responsiveness of the German Manchester-Oxford Foot Questionnaire (MOXFQ) in patients with foot or ankle surgery.

BACKGROUND: Patient-reported outcome measures are a critical tool in evaluating the efficacy of orthopaedic procedures. The intention of this study was to develop and culturally adapt a German version of the Manchester-Oxford Foot Questionnaire (MOXFQ) and to evaluate reliability, validity and responsiveness. METHODS: According to guidelines forward and backward translation has been performed. The German MOXFQ was investigated in 177 consecutive patients before and 6 months after foot or ankle surgery. All patients completed MOXFQ, Foot and Ankle Outcome Score (FAOS), Short form 36 and numeric scales for pain and disability (NRS). Test-Retest reliability, internal consistency, floor and ceiling effects, construct validity and minimal important change were analyzed. RESULTS: The German MOXFQ demonstrated excellent test-retest reliability with ICC values >0.9 Cronbach's alpha (α) values demonstrated strong internal consistency. No floor or ceiling effects were observed. As hypothesized MOXFQ subscales correlated strongly with corresponding FAOS and SF-36 domains. All subscales showed excellent (ES/SRM >0.8) responsiveness between preoperative assessment and postoperative follow-up. CONCLUSIONS: The German version of the MOXFQ demonstrated good psychometric properties. It proofed to be a valid and reliable instrument for use in foot and ankle patients.

Reliability, validity and responsiveness of the German self-reported foot and ankle score (SEFAS) in patients with foot or ankle surgery.

BACKGROUND: Patient-reported outcome measures are a critical tool in evaluating the efficacy of orthopedic procedures and are increasingly used in clinical trials to assess outcomes of health care. The intention of this study was to develop and culturally adapt a German version of the Self-reported Foot and Ankle Score (SEFAS) and to evaluate reliability, validity and responsiveness. METHODS: According to Cross Cultural Adaptation of Self-Reported Measure guidelines forward and backward translation has been performed. The German SEFAS was investigated in 177 consecutive patients. 177 Patients completed the German SEFAS, Foot and Ankle Outcome Score (FAOS), Short-Form 36 and numeric scales for pain and disability (NRS) before and 118 patients 6 months after foot or ankle surgery. Test-Retest reliability, internal consistency, floor and ceiling effects, construct validity and minimal important change were analyzed. RESULTS: The German SEFAS demonstrated excellent test-retest reliability with ICC values of 0.97. Cronbach's alpha (α) value of 0.89 demonstrated strong internal consistency. No floor or ceiling effects were observed for the German version of the SEFAS. As hypothesized SEFAS correlated strongly with FAOS and SF-36 domains. It showed moderate (ES/SRM > 0.5) responsiveness between preoperative assessment and postoperative follow-up. CONCLUSION: The German version of the SEFAS demonstrated good psychometric properties. It proofed to be a valid and reliable instrument for use in foot and ankle patients. TRIAL REGISTRATION: DRKS00007585.