TABLE 4

Risk Score and Survival in Derivation and Validation Sets

0 (Low Risk, %)1–2 (Intermediate Risk, %)3–8 (High Risk, %)
Derivation set
 Died11 (4.0)78 (23.2)131 (58.5)
 Lived267 (96.0)259 (76.8)93 (41.5)
Validation set
 Died19 (6.6)90 (24.9)116 (48.7)
 Lived268 (93.4)271 (75.1)122 (51.3)