Can composite performance measures predict survival of patients with colorectal cancer?

Table 3 Composite performance scores (mean, range) calculated by different methods

Cohort	All-or-none	70% standard	Equal weight	AHP	PCA
1	0.07 ± 0.26	0.78 ± 0.42	0.74 ± 0.14	0.78 ± 0.14	0 ± 1.00
	(0.00-1.00)	(0.00-1.00)	(0.29-1.00)	(0.22-1.00)	(-6.44-1.04)
2	NA	0.68 ± 0.47	0.73 ± 0.12	0.73 ± 0.12	0 ± 1.00
	NA	(0.00-1.00)	(0.25-0.88)	(0.27-0.86)	(-2.03-1.23)
3	0.05 ± 0.21	0.76 ± 0.43	0.73 ± 0.14	0.77 ± 0.13	0 ± 1.00
	(0.00-1.00)	(0.00-1.00)	(0.14-1.00)	(0.19-1.00)	(-13.13-0.59)

Cohort 1: Colon cancer patients stage < III; Cohort 2: Colon cancer patients stage III; Cohort 3: Rectal cancer patients. AHP: Analytic hierarchy process; NA: Not applicable; PCA: Principal component analysis.