Abstract:
OBJECTIVE:Recent results published by Coste et al. in discriminant analysis with ordinal responses showed the superiority of optimal discriminating analysis for ordinal responses (ODAO) both in terms of classification and simplicity of implementation compared to classic methods (Fisher's discrimination, logistic regression) applied to medical data (prognostics of burns) and to simulated data. Nevertheless, the solutions obtained by ODAO may be sensitive to re-sampling (i.e the estimated coefficients by ODAO may show excessive sensitivity to the training sample). This study proposes some solutions to control the fluctuations of sampling and to ensure model stability. METHODS:We used intensive computational methods and bootstrapping, at the outset of model building in order to reduce the sampling variability of estimated coefficients. Thus, the estimation of the coefficients was not based on the minimization of a classification criterion of the training sample, but on the minimization of an aggregate criterion of bootstrapped replications of a classification criterion. Five aggregate criteria were studied. RESULTS:The improvement in terms of robustness appeared in 30% of the test cases with moderate training sample size and 55% of those with small training sample size. CONCLUSION:Simulated test cases showed that bootstrapping can help construct more robust models in difficult classification situations and small training samples which are particularly frequent.
journal_name
Methods Inf Medjournal_title
Methods of information in medicineauthors
Le Teuff G,Quantin C,Venot A,Walter E,Coste Jkeywords:
subject
Has Abstractpub_date
2005-01-01 00:00:00pages
704-11issue
5eissn
0026-1270issn
2511-705Xpii
05050704journal_volume
44pub_type
杂志文章abstract::This paper presents a tutorial introduction to the handling of uncertainty and decision-making in medical reasoning systems. It focuses on the central role of uncertainty in all of medicine and identifies the major themes that arise in research papers. It then reviews simple Bayesian formulations of the problem and pu...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00
abstract::A few years ago, a new method of survival analysis, denoted period analysis, has been developed to derive more up-to-date estimates of long-term survival rates of cancer patients, but this method has rarely been applied so far. Using empirical examples from the Saarland Cancer Registry, we illustrate how seriously tra...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2001-07-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME10-01-0062
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2004-01-01 00:00:00
abstract::Validation of expert system knowledge bases has proved to be difficult. This paper presents a description of a system called ScriptGen that generates test data for validating the knowledge base of the ONCOCIN cancer therapy planning system. Because of the size and complexity of the ONCOCIN knowledge base, we require t...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract:OBJECTIVES:As a preliminary for the design of Computer-Based Patient Records, the aim of this paper is to build an understanding of the roles physical artifacts like paper-based patient records play in supporting cognition and collaboration in the health-care settings. METHOD:A small ethnographically-informed study wa...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2000-06-01 00:00:00
abstract:OBJECTIVES:To assess the impact of a CPOE system on medication-related communication of nurses and physicians. METHODS:In six internal medicine wards of an academic medical center, two questionnaires were used to evaluate nurses' attitudes toward the impact of a paper-based medication system and then a CPOE system on ...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME0572
更新日期:2009-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME9222
更新日期:2009-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1998-09-01 00:00:00
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journal_title:Methods of information in medicine
pub_type:
doi:
更新日期:2002-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 社论
doi:10.1160/me5006
更新日期:2007-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2004-01-01 00:00:00
abstract::Surgical fluid replacement is a critical issue in medicine as the fluid volume excess or deficit can both complicate the patient's condition. Currently, the administration of fluid volume is carried out primarily based on the experience and expertise of the anaesthetist as there is no analytical method available to es...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME11-02-0049
更新日期:2013-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME13-02-0019
更新日期:2015-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME13-01-0093
更新日期:2014-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME14-02-0030
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journal_title:Methods of information in medicine
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doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME0607
更新日期:2009-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME11-02-0025
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
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