Table 3.

HRs and 2-, 3- and 4-year PFS and OS probabilities for patients at high and low risk in the hold-out set for the model with imaging and clinical variables and the model with clinical variables only

	PFS					OS
	N	HR (95% CI)	2-year PFS probability, % (95% CI)	3-year PFS probability, % (95% CI)	4-year PFS probability, % (95% CI)	n	HR (95% CI)	2-year OS probability, % (95% CI)	3-year OS probability, % (95% CI)	4-year OS probability, % (95% CI)
Model with imaging and clinical variables
Low-risk patients	200	Reference	84 (79–90)	82 (76–87)	77 (71–83)	210	Reference	90 (86–94)	89 (85–94)	88 (84–93)
High-risk patients	222	1.87 (1.31–2.67)	68 (62–74)	65 (58–72)	60 (53–67)	212	2.16 (1.37–3.40)	79 (74–85)	76 (70–82)	75 (69–81)
Model with clinical variables only
Low-risk patients	197	Reference	82 (76–87)	78 (73–84)	72 (66–79)	197	Reference	88 (83–92)	86 (81–91)	85 (80–90)
High-risk patients	225	1.38 (0.98–1.96)	70 (64–77)	68 (62–75)	64 (58–71)	225	1.40 (0.90–2.17)	82 (77–87)	80 (75–85)	78 (73–84)

CI Confidence interval, HR Hazard ratio, OS Overall survival, PFS Progression-free survival