a favorable trendp = 0.050
Compared with the FLIPI model for OS prediction, FLIPI-SII showed improved reclassification and discrimination at 3 years (NRI = 0.245, p = 0.034; IDI = 0.013, p = 0.028), and maintained a favorable trend at 5 years (NRI = 0.247, p = 0.050; IDI = 0.018, p = 0.096).