Unsupervised versus Supervised Identification of Prognostic Factors in Patients with Localized Retroperitoneal Sarcoma: A Data Clustering and Mahalanobis Distance Approach

Table 5

Multivariate analysis of clinical descriptors by stepwise DFA. The association with the vital status by stepwise discriminant function analysis (DFA) was carried out according to the casewise (on the left) or the mean-substitution (on the right) methods.

	Casewise	Mean substitution
	Wilks’ λ (pi level)	Wilks’ λ (pi level)
DFI	0.60 (<0.001)	0.58 (<0.001)
Histology	0.45 (0.04)	0.43 (0.03)
Age	0.45 (0.04)	0.42 (0.18)
Relapse pattern	0.43 (0.10)	0.43 (0.04)
Size	0.43 (0.17)	0.41 (0.11)