A new scoring system in Cystic Fibrosis: statistical tools for database analysis - a preliminary report.

Détails

Ressource 1Télécharger: BIB_66C6F1154176.P001.pdf (380.51 [Ko])
Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_66C6F1154176
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A new scoring system in Cystic Fibrosis: statistical tools for database analysis - a preliminary report.
Périodique
BMC Medical Informatics and Decision Making
Auteur(s)
Hafen G.M., Hurst C., Yearwood J., Smith J., Dzalilov Z., Robinson P.J.
ISSN
1472-6947
Statut éditorial
Publié
Date de publication
10/2008
Peer-reviewed
Oui
Volume
8
Numéro
4
Pages
44
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Résumé
BACKGROUND: Cystic fibrosis is the most common fatal genetic disorder in the Caucasian population. Scoring systems for assessment of Cystic fibrosis disease severity have been used for almost 50 years, without being adapted to the milder phenotype of the disease in the 21st century. The aim of this current project is to develop a new scoring system using a database and employing various statistical tools. This study protocol reports the development of the statistical tools in order to create such a scoring system. METHODS: The evaluation is based on the Cystic Fibrosis database from the cohort at the Royal Children's Hospital in Melbourne. Initially, unsupervised clustering of the all data records was performed using a range of clustering algorithms. In particular incremental clustering algorithms were used. The clusters obtained were characterised using rules from decision trees and the results examined by clinicians. In order to obtain a clearer definition of classes expert opinion of each individual's clinical severity was sought. After data preparation including expert-opinion of an individual's clinical severity on a 3 point-scale (mild, moderate and severe disease), two multivariate techniques were used throughout the analysis to establish a method that would have a better success in feature selection and model derivation: 'Canonical Analysis of Principal Coordinates' and 'Linear Discriminant Analysis'. A 3-step procedure was performed with (1) selection of features, (2) extracting 5 severity classes out of a 3 severity class as defined per expert-opinion and (3) establishment of calibration datasets. RESULTS: (1) Feature selection: CAP has a more effective "modelling" focus than DA.(2) Extraction of 5 severity classes: after variables were identified as important in discriminating contiguous CF severity groups on the 3-point scale as mild/moderate and moderate/severe, Discriminant Function (DF) was used to determine the new groups mild, intermediate moderate, moderate, intermediate severe and severe disease. (3) Generated confusion tables showed a misclassification rate of 19.1% for males and 16.5% for females, with a majority of misallocations into adjacent severity classes particularly for males. CONCLUSION: Our preliminary data show that using CAP for detection of selection features and Linear DA to derive the actual model in a CF database might be helpful in developing a scoring system. However, there are several limitations, particularly more data entry points are needed to finalize a score and the statistical tools have further to be refined and validated, with re-running the statistical methods in the larger dataset.
Mots-clé
Child, Cystic Fibrosis, Data Interpretation, Statistical, Databases, Factual, Female, Humans, Male, Severity of Illness Index
Pubmed
Web of science
Open Access
Oui
Création de la notice
20/10/2008 16:18
Dernière modification de la notice
20/08/2019 15:22
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