Abstract

Background: The modified frailty index (mFI-5) has been shown to be a reliable risk stratification tool in different spine procedures. Its usefulness to predict complications after 1-level or 2-level anterior cervical decompression and fusion (ACDF) has not been studied extensively. Purpose: We aimed to assess the usefulness of the mFI-5 in 1-level or 2-level ACDF surgery by asking the following questions: (1) Is the mFI-5 a reliable tool to predict complications after 1-level or 2-level ACDF? (2) Is the mFI-5 useful in predicting prolonged hospital stay after 1-level or 2-level ACDF? (3) Is the mFI-5 useful in predicting readmission after 1-level or 2-level ACDF? Methods: We performed a retrospective analysis of the medical records of patients who underwent 1-level or 2-level ACDF at our institution. The mFI-5 was calculated based on the presence of 5 comorbidities: (1) congestive heart failure, (2) diabetes mellitus, (3) chronic obstructive pulmonary disease, (4) partially or totally dependent functional status, and (5) hypertension requiring medication. Patients were classified in 3 groups: not frail (mFI-5 items = 0), pre-frail (mFI-5 items = 1), and frail (mFI-5 items ≥2). Postoperative complications, length of stay, and readmission were recorded. Results: In the 662 patients included (mean age 51.4 ± 10.4 years), surgical and medical complications were not significantly different among groups. Lengths of stay and readmission rates were both significantly higher in the pre-frail group. Conclusion: Our study findings suggest that the mFI-5 might not be reliable to assess preoperative risk after 1-level or 2-level ACDF.

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