Table 3. Prognostic groups and survival of the training and the confirmatory cohorts based on the Montreal prognostic score.

		Training cohort (N=258)		Confirmatory cohort (N=433)
Groups	Total prognostic scores based on five prognostic values	Number of patients	Median survival time (in months) (95% CI)	Number of patients	Median survival time (in months) (95% CI)
1	0–3	85	18.2 (14.0, 27.5)	101	22.3 (18.3, 31.4)
2	4–12	152	8.2 (7.0, 9.4)	306	7.5 (6.7, 8.9)
3	13	21	2.5 (1.8, 4.2)	26	3.3 (1.6, 5.7)

Abbreviation: CI=confidence interval.

Log-rank P<0.001.