| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Internal consistency (Cronbach’s α) of the Thai VAS‐FA has been reported for the total score as greater than 0.99. Additionally, internal consistency (Cronbach’s α) of the Turkish VAS‐FA total and domain scores has been reported for individuals with foot pain (0.75‐0.92) and without foot pain (0.93‐0.96). Finally, internal consistency (Cronbach’s α) of the Finnish VAS‐FA total and domain scores was evaluated in 165 individuals who had undergone foot and/or ankle surgery and was reported as follows: total, 0.96; pain, 0.91; function, 0.94; and other complaints, 0.81 |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Test‐retest reliability of the total score of the Thai VAS‐FA in 42 individuals has been reported as 0.99 (95% confidence interval [CI] 0.99‐1.00). In addition, test‐retest reliability (intraclass correlation coefficients) of the Turkish VAS‐FA in 128 individuals (63 with foot disorders and 65 asymptomatic individuals) for the total score and each domain score has been reported as follows: total, 0.93 (95% CI 0.90‐0.96); pain, 0.88 (95% CI 0.819‐0.928); function, 0.88 (95% CI 0.82‐0.93); and other, 0.93 (95% CI 0.90‐0.96). Similarly, test‐retest reliability (intraclass correlation coefficients) of the total score of the Finnish VAS‐FA was 0.93 |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
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| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description | |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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