Fig. 1
Projections of the observations in the component plane (graph of the second principal component against the first principal component). (a) Influence graphic for R and Xc. (b) Score graphic for R and Xc. (c) Influence graphic for R/H and Xc/H. (d) Score graphic for R/H and Xc/H. (e) Influence graphic for R/H2 and Xc/H2. (f) Score graphic for R/H2 and Xc/H2. The variables in the influence graphs (Fig. 1a, c, e) represented age (X1), gender (X2), patient weight (X3), H (X4), θ (X7), degree of ECOG functional scale (X8), tumor stage (X9), tumor histological variety (X10), BMI (X11). The variable X5 symbolized R (Fig. 1a), R/H (Fig. 1c) and R/H2 (Fig. 1e). The variable X6 denoted Xc (Fig. 1a), Xc/H (Fig. 1c) and Xc/H2 (Fig. 1e). In the score graphics were represented the name initial of each patient corresponding to its code showed in Table 1: Code 1 (NPB), Code 2 (OMR), Code 3 (NHB), Code 4 (RSF), Code 5 (LGT), Code 6 (HMR), Code 7 (MBZ), Code 8 (ODR), Code 9 (OGC), Code 10 (JIRB), Code 11 (EGM), Code 12 (EPI), Code 13 (ITR), Code 14 (JRL), Code 15 (VTT), Code 16 (JCRO), Code 17 (RMP), Code 18 (ECP), Code 19 (EGC), Code 20 (NLB), Code 21 (OSP), Code 22 (CPI) and Code 23 (RGF). Patients with initials NHB, OSP, NLB, EGM, ECP, EGC, LGT, ITR, RSF, JLR, ODR, OGC and OMR deceased during the writing of this paper (Fig. 1b, d, f). The patient OMR died by global heart failure