Machine learning models featuring somatic and mental comorbidities for prolonged length-of-stay in a maximum care university hospital [code]
Abstract Background: Knowledge about the influencing factors on hospital in-patient length-of-stay is integral for optimizing care and resource planning. Existing studies on prolonged length-of-stay prediction choose a precise figure as threshold for the number of days that classifies the length-of-...
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Database Research Data |
| Language: | English |
| Published: |
Heidelberg
Universität
2025-06-27
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| DOI: | 10.11588/DATA/HP9O2J |
| Subjects: | |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.11588/DATA/HP9O2J Verlag, kostenfrei, Volltext: https://heidata.uni-heidelberg.de/dataset.xhtml?persistentId=doi:10.11588/DATA/HP9O2J 
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| Author Notes: | Sophia Stahl-Toyota, Ivo Dönnhoff, Ede Nagy, Achim Hochlehnert, Stefan Bönsel, Inga Unger, Julia Szendrödi, Norbert Frey, Patrick Michl, Carsten Müller-Tidow, Dirk Jäger, Hans-Christoph Friederich, Christoph Nikendei |
| Summary: | Abstract Background: Knowledge about the influencing factors on hospital in-patient length-of-stay is integral for optimizing care and resource planning. Existing studies on prolonged length-of-stay prediction choose a precise figure as threshold for the number of days that classifies the length-of-stay as prolonged and base the analysis on either a large and diverse sample or a very specific cohort. Most studies take somatic comorbidities into account, while only a subset incorporates mental comorbidities, with varying definitions of the composition of comorbidity subgroups. Objectives: (I) After which timeframe does the number of days of inpatient treatment indicate a prolonged length-of-stay if the threshold for outliers is computed department-wise in a maximum care internal medicine university hospital? (II) How accurate can machine learning models predict prolonged length-of-stay in internal medicine patients? (III) Which mental and somatic comorbidities have the strongest influence on length-of-stay prediction? Methods: From six internal medicine departments at the German University Hospital in Heidelberg, a total of N=28,536 cases treated in the years 2017 to 2019 comprised the study population for which a department-level threshold for prolonged length-of-stay was computed. For each of the six departments, four machine learning models were built that were based on the prolonged length-of-stay classification on variables derived from demographics and mental as well as somatic comorbidities. Results: Length-of-stay was classified as prolonged if the number of days at the hospital equaled or exceeded 9 (Cardiology), 10 (General and Psychosomatics, Gastroenterology, Medical Oncology), 11 (Endocrinology) or 26 (Hematology). With Area under the Receiver Operator Curve (AUROC)=0.89 the random forest for the Department of Hematology had the highest predictive power, the random forest for the Department of General and Psychosomatic with AUROC=0.72 the lowest. The variables with strongest influence on the prediction comprised the number of somatic comorbidities, the age at diagnosis, mental and somatic comorbidity subgroups. Among the mental comorbidities, stress-related adjustment disorder was the most prominent factor. Conclusions: Consideration of department-level factors is recommended for prolonged length-of-stay prediction models. Mental as well as somatic comorbidities were among the most relevant factors for the prediction of prolonged length-of-stay and require adequate treatment and reimbursement opportunities. |
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| Item Description: | Gesehen am 07.08.2025 |
| Physical Description: | Online Resource |
| DOI: | 10.11588/DATA/HP9O2J |