An Editors’ Note was omitted that refers readers to the following commentary on this paper:
Hilden J. On NRI, IDI, and “good-looking” statistics with nothing underneath. Epidemiology. 2014:25:265–267.
Kerr KF, Wang Z, Janes H, McClelland RL, Psaty BM, Pepe MS. Net Reclassification Indices for evaluating risk prediction instruments: a critical review. Epidemiology. 2014; 25:114–121