The Modified Frailty Index Predicts Major Complications in Oncoplastic Reduction Mammoplasty

Background: An important component of preoperative counseling and patient selection involves surgical risk stratification. There are many tools developed to predict surgical complications. The Modified Frailty Index (mFI) calculates risk based on the following five elements: hypertension, chronic obstructive pulmonary disease, congestive heart failure, diabetes, and functional status. Recent literature demonstrates the efficacy of the mFI across multiple surgical disciplines. We elected to investigate its utility in oncoplastic reductions (OCR).

Methods: A retrospective review of all patients with breast cancer who underwent OCR from 1998 to 2020 was queried from a prospectively maintained database. Patient demographics, comorbidities, and surgical details were reviewed. The mFI was computed for each patient. The primary clinical outcome was the development of complications.

Results: 547 patients were included in the study cohort. The average age was 55 and the average body mass index was 33.5. The overall complication rate was 19% (n = 105) and the major complication rate was 9% (n = 49). Higher frailty scores were significantly associated with the development of major complications (P < 0.05). mFI scores of 0 had a major complication rate of 5.7%; scores of 1, 13%; and scores of 2, 15.1%. The relative risk of a major complication in patients with elevated mFI (>0) was 2.2. Age, body mass index, and resection weights were not associated with complications (P = 0.15, P = 0.87, and P = 0.30 respectively) on continuous analysis.

Conclusions: Elevated mFI scores are associated with an increased major complication profile in patients who are undergoing OCR. Hypertension and diabetes are the most common comorbidities in our population, and this tool may assist with preoperative counseling and risk stratification. Benefits of this risk assessment tool include its ease of calculation and brevity. Our study is the first to demonstrate its utility in OCR; however, further study in high-risk patients would strengthen the applicability of this frailty index.