{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T16:43:03Z","timestamp":1774456983247,"version":"3.50.1"},"reference-count":68,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2025,3,8]],"date-time":"2025-03-08T00:00:00Z","timestamp":1741392000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computation"],"abstract":"<jats:p>The global COVID-19 pandemic has generated extensive datasets, providing opportunities to apply machine learning for diagnostic purposes. This study evaluates the performance of five supervised learning models\u2014Random Forests (RFs), Artificial Neural Networks (ANNs), Support Vector Machines (SVMs), Logistic Regression (LR), and Decision Trees (DTs)\u2014on a hospital-based dataset from the Concepci\u00f3n Department in Paraguay. To address missing data, four imputation methods (Predictive Mean Matching via MICE, RF-based imputation, K-Nearest Neighbor, and XGBoost-based imputation) were tested. Model performance was compared using metrics such as accuracy, AUC, F1-score, and MCC across five levels of missingness. Overall, RF consistently achieved high accuracy and AUC at the highest missingness level, underscoring its robustness. In contrast, SVM often exhibited a trade-off between specificity and sensitivity. ANN and DT showed moderate resilience, yet were more prone to performance shifts under certain imputation approaches. These findings highlight RF\u2019s adaptability to different imputation strategies, as well as the importance of selecting methods that minimize sensitivity\u2013specificity trade-offs. By comparing multiple imputation techniques and supervised models, this study provides practical insights for handling missing medical data in resource-constrained settings and underscores the value of robust ensemble methods for reliable COVID-19 diagnostics.<\/jats:p>","DOI":"10.3390\/computation13030070","type":"journal-article","created":{"date-parts":[[2025,3,10]],"date-time":"2025-03-10T09:36:24Z","timestamp":1741599384000},"page":"70","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["COVID-19 Data Analysis: The Impact of Missing Data Imputation on Supervised Learning Model Performance"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2821-7538","authenticated-orcid":false,"given":"Jorge Daniel","family":"Mello-Rom\u00e1n","sequence":"first","affiliation":[{"name":"Faculty of Exact and Technological Sciences, Universidad Nacional de Concepci\u00f3n, Concepci\u00f3n 010123, Paraguay"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-5887-0527","authenticated-orcid":false,"given":"Adri\u00e1n","family":"Mart\u00ednez-Amarilla","sequence":"additional","affiliation":[{"name":"Faculty of Exact and Technological Sciences, Universidad Nacional de Concepci\u00f3n, Concepci\u00f3n 010123, Paraguay"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"pgac125","DOI":"10.1093\/pnasnexus\/pgac125","article-title":"The reproducibility of COVID-19 data analysis: Paradoxes, pitfalls, and future challenges","volume":"1","author":"Malgaroli","year":"2022","journal-title":"PNAS Nexus"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1186\/s12963-021-00274-z","article-title":"Addressing missing values in routine health information system data: An evaluation of imputation methods using data from the Democratic Republic of the Congo during the COVID-19 pandemic","volume":"19","author":"Feng","year":"2021","journal-title":"Popul. 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