Nomograms predicting long-term survival in patients with invasive intraductal papillary mucinous neoplasms of the pancreas: A population-based study

Table 3 The net reclassification improvement and integrated discrimination improvement of the nomogram compared to the American Joint Committee on Cancer 7^th staging system

Category	NRI (95%CI)	P value	IDI (95%CI)	P value
OS
Training set
3-yr OS	0.564 (0.413-0.731)	< 0.001	0.106	< 0.001
5-yr OS	0.467 (0.292-0.653)	< 0.001	0.104	< 0.001
10-yr OS	0.458 (0.323-0.715)	< 0.001	0.091	< 0.001
Validation set
3-yr OS	0.526 (0.344-0.714)	< 0.001	0.095	< 0.001
5-yr OS	0.455 (0.225-0.697)	< 0.001	0.092	< 0.001
10-yr OS	0.529 (0.234-0.764)	< 0.001	0.076	< 0.001
CSS
Training set
3-yr OS	0.570 (0.293-0.763)	< 0.001	0.076	< 0.001
5-yr OS	0.376 (0.225-0.673)	< 0.001	0.072	< 0.001
10-yr OS	0.421 (0.174-0.662)	< 0.001	0.068	< 0.001
Validation set
3-yr OS	0.461 (0.246-0.752)	< 0.001	0.065	< 0.001
5-yr OS	0.368 (0.197-0.680)	< 0.001	0.060	< 0.001
10-yr OS	0.436 (0.188-0.711)	< 0.001	0.059	< 0.001

OS: Overall survival; CSS: Cancer-specific survival; NRI: Net reclassification improvement; IDI: Integrated discrimination improvement; CI: Confidence interval.