Prediction of Posttraumatic Functional Recovery in Middle-aged and Older Patients Through Dynamic Ensemble Selection Modeling

Overview

Journal Front Public Health

Specialty Public Health

Date 2023 Jul 6

PMID 37408743

Authors

Nguyen Thanh Nhu

Jiunn-Horng Kang

Tian-Shin Yeh

Chia-Chieh Wu

Cheng-Yu Tsai

Krisna Piravej

Carlos Lam

Affiliations

Soon will be listed here.

Abstract

Introduction: Age-specific risk factors may delay posttraumatic functional recovery; complex interactions exist between these factors. In this study, we investigated the prediction ability of machine learning models for posttraumatic (6 months) functional recovery in middle-aged and older patients on the basis of their preexisting health conditions.

Methods: Data obtained from injured patients aged ≥45 years were divided into training-validation ( = 368) and test ( = 159) data sets. The input features were the sociodemographic characteristics and baseline health conditions of the patients. The output feature was functional status 6 months after injury; this was assessed using the Barthel Index (BI). On the basis of their BI scores, the patients were categorized into functionally independent (BI >60) and functionally dependent (BI ≤60) groups. The permutation feature importance method was used for feature selection. Six algorithms were validated through cross-validation with hyperparameter optimization. The algorithms exhibiting satisfactory performance were subjected to bagging to construct stacking, voting, and dynamic ensemble selection models. The best model was evaluated on the test data set. Partial dependence (PD) and individual conditional expectation (ICE) plots were created.

Results: In total, nineteen of twenty-seven features were selected. Logistic regression, linear discrimination analysis, and Gaussian Naive Bayes algorithms exhibited satisfactory performances and were, therefore, used to construct ensemble models. The k-Nearest Oracle Elimination model outperformed the other models when evaluated on the training-validation data set (sensitivity: 0.732, 95% CI: 0.702-0.761; specificity: 0.813, 95% CI: 0.805-0.822); it exhibited compatible performance on the test data set (sensitivity: 0.779, 95% CI: 0.559-0.950; specificity: 0.859, 95% CI: 0.799-0.912). The PD and ICE plots showed consistent patterns with practical tendencies.

Conclusion: Preexisting health conditions can predict long-term functional outcomes in injured middle-aged and older patients, thus predicting prognosis and facilitating clinical decision-making.

Citing Articles

Improving Functional Capacities and Well-Being in Older Adults: Strategies in Physical Medicine and Rehabilitation.

Vancea A, Iliescu M, Aivaz K, Popescu M, Beiu C, Spiru L Cureus. 2024; 16(8):e66254.

PMID: 39238764 PMC: 11375479. DOI: 10.7759/cureus.66254.

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