Table 3. Survival outcome according to clusters.

Outcome	Cluster 1 (n=310)	Cluster 2 (n=324)	Cluster 3 (n=35)	P value
Metastasis or recurrence				<0.001
No	298 (96.1)	262 (80.9)	34 (97.1)
Yes	12 (3.9)	62 (19.1)	1 (2.9)
HR*	Reference	5.294 (2.853–9.825)	0.670 (0.087–5.162)

Unless otherwise indicated, data are presented as n (%). *, data in parentheses are presented as 95% confidence interval. Hazard ratio refers to the risk of metastasis or recurrence in each cluster compared to a reference group. HR, hazard ratio.