Abstract
Background
Many scoring systems exist that assess ankle function, none of them are validated for use in a group of higher demand patients. This group of patients there have potential problems with ceiling effects, not being able to detect change or that a sports-subscale is not included. This study was to create a validated self-administered scoring system for ankle injuries in athletes by studying existing scoring systems and key-informant interviews.
Methods
The Sports Athlete Foot and Ankle Score (SAFAS) was developed from interviews with athletes as well as expert-opinions. Initially 26 patients were interviewed before creating the scoring system, this was modified from the Foot and Ankle Outcome Score, this had been partially validated previously and the subjects regarded the content as relevant but incomplete. Secondly, SAFAS the content was validated in a group of 25 patients with a range of injuries and 14 athletes without ankle injury. It is a self-administered region specific sports foot and ankle score that containing four subscales assessing the levels of symptoms, pain, daily living and sports.
Results
Spearman correlation coefficients between SAFAS and the Foot and Ankle Ability Measure (FAAM) are 0.88 for activities of daily living and 0.78 for sports. Content validity gave high satisfaction at 75%. There was good internal consistency of each subscale; symptoms 0.77, pain 0.92, daily living 0.92 and sports 0.88. SAFAS has shown to be able to differentiate between injured and non-injured athletes.
Conclusion
SAFAS is a measurement a suitable tool to assess differences in ankle function and disability between injured and non-injured athletes. It is valid to be used as a score in those clinical conditions which affect the high levels of ankle and hind foot function.
