Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit
Thesis (S.M.)--Harvard-MIT Division of Health Sciences and Technology, 2009.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2010
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| Online Access: | http://hdl.handle.net/1721.1/54457 |
| _version_ | 1826212098071330816 |
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| author | Celi, Leo Anthony G |
| author2 | Peter Szolovits. |
| author_facet | Peter Szolovits. Celi, Leo Anthony G |
| author_sort | Celi, Leo Anthony G |
| collection | MIT |
| description | Thesis (S.M.)--Harvard-MIT Division of Health Sciences and Technology, 2009. |
| first_indexed | 2024-09-23T15:16:21Z |
| format | Thesis |
| id | mit-1721.1/54457 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:16:21Z |
| publishDate | 2010 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/544572019-04-12T23:37:12Z Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit Local customized mortality for patients with acute kidney injury admitted to the intensive care unit Celi, Leo Anthony G Peter Szolovits. Harvard University--MIT Division of Health Sciences and Technology. Harvard University--MIT Division of Health Sciences and Technology. Harvard University--MIT Division of Health Sciences and Technology. Thesis (S.M.)--Harvard-MIT Division of Health Sciences and Technology, 2009. Cataloged from PDF version of thesis. Includes bibliographical references (p. 33-35). Introduction. Models for mortality prediction are traditionally developed from prospective multi-center observational studies involving a heterogeneous group of patients to optimize external validity. We hypothesize that local customized modeling using retrospective data from a homogeneous subset of patients will provide a more accurate prediction than this standard approach. We tested this hypothesis on patients admitted to the ICU with acute kidney injury (AKI), and evaluated variables from the first 72 hours of admission. Methods. The Multi-parameter Intelligent Monitoring for Intensive Care II (MIMIC II) is a database of patients admitted to the Beth Israel Deaconess Medical Center ICU. Using the MIMIC II database, we identified patients who developed acute kidney injury and who survived at least 72 hours in the ICU. 118 variables were extracted from each patient. Second and third level customization of the Simplified Organ Failure Score (SAPS) was performed using logistic regression analysis and the best fitted models were compared in terms of Area under the Receiver Operating Characteristic Curve (AUC) and Hosmer-Lemeshow Goodness-of-Fit test (HL). The patient cohort was divided into a training and test data with a 70:30 split. Ten-fold cross-validation was performed on the training set for every combination of variables that were evaluated. The best fitted model from the cross-validation was then evaluated using the test set, and the AUC and the HL p value on the test set were reported. Results. A total of 1400 patients were included in the study. Of these, 970 survived and 430 died in the hospital (30.7% mortality). We observed progressive improvement in the performance of SAPS on this subset of patients (AUC=0.6419, HL p=0) with second level (AUC=0.6639, HL p=0.2056), and third level (AUC=0.7419, HL p=0.6738) customization. The best fitted model incorporated variables from the first 3 days of ICU admission. The variables that were most predictive of hospital mortality in the multivariate analysis are the maximum blood urea nitrogen and the minimum systolic blood pressure from the third day. Conclusion. A logistic regression model built using local data for patients with AKI performed better than SAPS, the current standard mortality prediction scoring system. by Leo Anthony G. Celi. S.M. 2010-04-28T15:35:25Z 2010-04-28T15:35:25Z 2009 2009 Thesis http://hdl.handle.net/1721.1/54457 551178834 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 94 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Harvard University--MIT Division of Health Sciences and Technology. Celi, Leo Anthony G Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title | Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title_full | Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title_fullStr | Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title_full_unstemmed | Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title_short | Localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| title_sort | localized customized mortality prediction modeling for patients with acute kidney injury admitted to the intensive care unit |
| topic | Harvard University--MIT Division of Health Sciences and Technology. |
| url | http://hdl.handle.net/1721.1/54457 |
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