4.3 Article

Efficacy of the modified Frailty Index and the modified Charlson Comorbidity Index in predicting complications in patients undergoing operative management of proximal humerus fracture

Journal

JOURNAL OF SHOULDER AND ELBOW SURGERY
Volume 30, Issue 3, Pages 658-667

Publisher

MOSBY-ELSEVIER
DOI: 10.1016/j.jse.2020.06.014

Keywords

Proximal humerus fracture; reverse total shoulder arthroplasty; open reduction internal fixation; Charlson Comorbidity Index; Frailty Index; American Society of Anesthesiologists classification; adverse events

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This study examined the association between surgical complications and comorbidity indices in patients undergoing surgery for proximal humerus fractures, finding that both mFI-5 and mCCI were significantly associated with adverse events but had moderate predictive ability.
Background: Comorbidity indices such as the 5-factor modified Frailty Index (mFI-5) and modified Charlson Comorbidity Index (mCCI) are widely used in outcomes research. Methods: A total of 3893 patients who underwent total shoulder arthroplasty (n = 975), hemiarthroplasty (n = 495), or open reduction and internal fixation (n = 2423) for the treatment of proximal humerus fracture from 2005-2017 were identified from the National Surgical Quality Improvement Program database. Data regarding demographics, comorbidities, American Society of Anesthesiologists class, and postoperative complications were collected, and the mFI-5 and mCCI were calculated for each case. Multivariate logistic regression models and receiver operating characteristic curve analyses were performed. Results: The patient population had a mean age of 68.0 +/- 13.2 years, body mass index of 29.1 +/- 8.1 and mean operative time of 119.9 +/- 55.5 minutes. The most common complications within this cohort were extended length of stay (4 days or more) (1085/3893; 27.87%), transfusion (377/3893; 9.68%), unplanned reoperation (97/3893; 2.49%), urinary tract infection (43/3893; 1.10%), death (42/3893; 1.08%), and deep vein thrombosis (40/3893; 1.03%). After accounting for patient demographics, the mFI-5 (odds ratio [OR] = 1.105, P < .001) and mCCI (OR = 1.063, P < .001) were significantly associated with incidence of any adverse event. Both comorbidity indices had low positive predictive value and high negative predictive value for all adverse events. Conclusion: The comorbidity indices mCCI and mFI-5 are both strongly associated with adverse events but have moderate ability to predict complications following surgical treatment of proximal humerus fractures. (C) 2020 Journal of Shoulder and Elbow Surgery Board of Trustees. All rights reserved.

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