Principal component analysis and linear discriminant analysis of the initial data. The data were transformed using principal component analysis, keeping two components, followed by linear discriminant analysis. The letters C, U and T represent the control, UTI and TCC samples, respectively. The background color indicates the model odds of TCC; the dotted black line is where the odds of TCC is 1 (i.e. the log odds of TCC is 0). PC is principal component.