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Prognostic Scoring System for Patients Undergoing Reconstructive Foot and Ankle Surgery for Charcot Neuroarthropathy: The Charcot Reconstruction Preoperative Prognostic Score
Authors:David Rettedal  Alissa Parker  Adam Popchak  Patrick R. Burns
Abstract:Charcot neuroarthropathy is a destructive process that occurs in patients with peripheral neuropathy, often due to poorly controlled diabetes mellitus. Surgical reconstruction can be necessary to provide a plantigrade foot that is wound free. A risk of major amputation exists after a Charcot event and after attempted reconstruction. We retrospectively reviewed the data from 34 patients (36 reconstructions) who had undergone reconstructive surgery for Charcot neuroarthropathy. The mean patient age was 56.44 years. The mean follow-up period was 56 months. We collected patient age, body mass index, presence of wound or osteomyelitis, anatomic location, activity of disease, and hemoglobin A1c. Using these data, each patient was given a score using our novel prognostic scoring system, the Charcot Reconstruction Preoperative Prognostic Score (CRPPS). Our primary outcome measure was no wound and no major amputation at the final follow-up visit. The limb salvage rate was 89% (32 of 36), and 78% (28 of 36) had no wound at the final follow-up examination. For patients without a wound or major amputation at the final follow-up visit, the mean CRPPS was 2.96?±?1.23. The mean CRPPS for those with a wound or major amputation at the final follow-up visit was 4.33?±?1.07 (p?=?.0024). Univariate logistic regression revealed 2 statistically significant predictors of wound and/or amputation: anatomic location (odds ratio [OR] 5.0, 95% confidence interval [CI] 1.051 to 23.789; p?=?.043) and CRPPS (OR 2.724, 95% CI 1.274 to 5.823, p?=?.01). A CRPPS of ≥4 was also predictive of a negative outcome (OR 7.286, 95% CI 1.508 to 35.211; p?=?.013). This scoring system, with a sensitivity of 75%, specificity of 71%, and negative predictive value of 85%, is a potential starting point when educating patients and making treatment decisions in this exceptionally challenging group.
Keywords:4  Charcot  diabetes  neuroarthropathy  neuropathy  prognosis  ulcer
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