Multivariate Visual Clustering of Single Nucleotide Polymorphisms and Clinical Predictors using Cherno Faces

With advanced technology, collection of health-related data is undertaken on a large scale, producing large and high-dimensional data. Visualization of such data is important and useful for further statistical analyses such as classification and clustering. However, visualizing large multivariate datasets is challenging, especially for high dimensional data, as they are often complex and confounded. Currently, visualization for Single Nucleotide Polymorphisms (SNPs) and clinical predictors of disease are assessed separately. As there is increasing evidence of genetic-environmental interactions for pregnancy complications, prediction models based solely on either clinical measurements or genetic risk factors may be inadequate. Hence, we present an example of multivariate visualization on combinations of clinical measurements and SNPs through Cherno faces, and perform visual clustering for prediction of Preterm births (PTB). A random sample containing 100 patients (Uncomplicated pregnancy= 92, PTB=8) with 11 clinical and 4 genetic predictors are visualized into faces with various style of eyes, ears, nose and hair, showing two groups with similar face characteristics amongst Uncomplicated pregnancies and Preterm births.