TY - JOUR A2 - Kon, M. A. A2 - Najarian, K. AU - Burton, Mark AU - Thomassen, Mads AU - Tan, Qihua AU - Kruse, Torben A. PY - 2012 DA - 2012/11/28 TI - Gene Expression Profiles for Predicting Metastasis in Breast Cancer: A Cross-Study Comparison of Classification Methods SP - 380495 VL - 2012 AB - Machine learning has increasingly been used with microarray gene expression data and for the development of classifiers using a variety of methods. However, method comparisons in cross-study datasets are very scarce. This study compares the performance of seven classification methods and the effect of voting for predicting metastasis outcome in breast cancer patients, in three situations: within the same dataset or across datasets on similar or dissimilar microarray platforms. Combining classification results from seven classifiers into one voting decision performed significantly better during internal validation as well as external validation in similar microarray platforms than the underlying classification methods. When validating between different microarray platforms, random forest, another voting-based method, proved to be the best performing method. We conclude that voting based classifiers provided an advantage with respect to classifying metastasis outcome in breast cancer patients. SN - 2356-6140 UR - https://doi.org/10.1100/2012/380495 DO - 10.1100/2012/380495 JF - The Scientific World Journal PB - The Scientific World Journal KW - ER -