The development of a reliable, valid, and responsive rating scale would have value not only in assessing patient outcomes but also in reporting the results of clinical studies in foot and ankle surgery.

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There is a wide variation in the approach to surgical treatment of stage II acquired adult flatfoot deformity among academic foot and ankle surgeons. Most surgeons employed a combination of bony and soft-tissue procedures that preserved the subtalar and talonavicular joints.

Average preoperative ankle dorsiflexion with the knee straight was 5.1 degrees. Average preoperative ankle dorsiflexion with the knee bent was 22.8 degrees. Immediately following surgery the average ankle dorsiflexion with the knee straight was 23.2 degrees. The average correction was 18.1 degrees and this increase was significant (p < 0.0001.) In the 15 patients (20 legs) available for follow-up, the increase in ankle dorsiflexion with the knee straight was maintained (average: 24.9 degrees). Patients with gastrocnemius contracture who underwent an isolated gastrocnemius release increased their ankle dorsiflexion (knee straight) by an average of 18.1 degrees with postoperative ankle dorsiflexion (knee straight) being equivalent (23.2 and 22.8 degrees) to preoperative ankle dorsiflexion (knee bent). This correction appears to be maintained (23.2 vs. 24.9 degrees) at short-term follow-up.