. Author manuscript; available in PMC: 2022 Jun 27.

Published in final edited form as: Mod Pathol. 2021 Feb 26;34(6):1104–1115. doi: 10.1038/s41379-021-00735-8

Table-3.

Concordance statistics (c-index) of various risk scores for RFS

Risk Factor	C-index (SE)	Difference (SE)	P
PPB type	0.702 (± 0.035)

p53 group	0.685 (± 0.039)	−0.017 (± 0.038)	0.647
Stratified by type	0.581 (± 0.045)
Type I	0.611 (± 0.112)
Type II	0.503 (± 0.068)
Type III	0.651 (± 0.056)

p53 percent	0.704 (± 0.038)	0.002 (± 0.037)	0.964
Stratified by type	0.594 (± 0.046)
Type I	0.627 (± 0.143)
Type II	0.528 (± 0.066)
Type III	0.653 (± 0.063)

Abbreviations: RFS – recurrence-free survival; SE – standard error; PPB – pleuropulmonary blastoma.