Table 4.

HRs and 2-, 3- and 4-year PFS and OS probabilities for patients at high and low risk in the training 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	408	Reference	84 (80–88)	81 (77–85)	78 (74–82)	422	Reference	91 (88–94)	90 (87–93)	89 (85–92)
High-risk patients	438	2.36 (1.82–3.05)	64 (59–68)	59 (55–64)	57 (53–62)	424	2.69 (1.93–3.73)	79 (75–83)	74 (69–78)	71 (67–76)
Model with clinical variables only
Low-risk patients	419	Reference	80 (76–84)	76 (72–81)	74 (69–78)	419	Reference	90 (87–93)	88 (85–91)	86 (82–89)
High-risk patients	427	1.80 (1.40–2.30)	67 (63–72)	63 (58–68)	61 (56–66)	427	2.03 (1.48–2.78)	80 (76–84)	75 (71–80)	74 (70–78)

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