Feature selection and classification model construction on type 2 diabetic patients’ data.

Yue Huang, PJ McCullagh, Norman Black, Roy Harper

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)

Abstract

SummaryObjectiveDiabetes affects between 2% and 4% of the global population (up to 10% in the over 65 age group), and its avoidance and effective treatment are undoubtedly crucial public health and health economics issues in the 21st century. The aim of this research was to identify significant factors influencing diabetes control, by applying feature selection to a working patient management system to assist with ranking, classification and knowledge discovery. The classification models can be used to determine individuals in the population with poor diabetes control status based on physiological and examination factors.MethodsThe diabetic patients’ information was collected by Ulster Community and Hospitals Trust (UCHT) from year 2000 to 2004 as part of clinical management. In order to discover key predictors and latent knowledge, data mining techniques were applied. To improve computational efficiency, a feature selection technique, feature selection via supervised model construction (FSSMC), an optimisation of ReliefF, was used to rank the important attributes affecting diabetic control. After selecting suitable features, three complementary classification techniques (Naïve Bayes, IB1 and C4.5) were applied to the data to predict how well the patients’ condition was controlled.ResultsFSSMC identified patients’ ‘age’, ‘diagnosis duration’, the need for ‘insulin treatment’, ‘random blood glucose’ measurement and ‘diet treatment’ as the most important factors influencing blood glucose control. Using the reduced features, a best predictive accuracy of 95% and sensitivity of 98% was achieved. The influence of factors, such as ‘type of care’ delivered, the use of ‘home monitoring’, and the importance of ‘smoking’ on outcome can contribute to domain knowledge in diabetes control.ConclusionIn the care of patients with diabetes, the more important factors identified: patients’ ‘age’, ‘diagnosis duration’ and ‘family history’, are beyond the control of physicians. Treatment methods such as ‘insulin’, ‘diet’ and ‘tablets’ (a variety of oral medicines) may be controlled. However lifestyle indicators such as ‘body mass index’ and ‘smoking status’ are also important and may be controlled by the patient. This further underlines the need for public health education to aid awareness and prevention. More subtle data interactions need to be better understood and data mining can contribute to the clinical evidence base. The research confirms and to a lesser extent challenges current thinking. Whilst fully appreciating the requirement for clinical verification and interpretation, this work supports the use of data mining as an exploratory tool, particularly as the domain is suffering from a data explosion due to enhanced monitoring and the (potential) storage of this data in the electronic health record. FSSMC has proved a useful feature estimator for large data sets, where processing efficiency is an important factor.
Original languageEnglish
Pages (from-to)251-262
JournalArtif. Intell. Med.
Volume41
Issue number3
DOIs
Publication statusPublished - 2007

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Keywords

  • Type 2 diabetes
  • Blood glucose
  • Data mining
  • Classification
  • Feature selection

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