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Table 4 Incremental values of blunted heart rate recovery and max heart rate in terms of the goodness-of-fit and discriminability compared with conventional clinical prognostic factors

From: Blunted heart rate recovery is associated with coronary artery spasm in patients with suspected vasospastic angina

  Likelihood ratio test Discriminability
  LogLik Diff.(%) p-value* C-index (%) Diff.(%) p-value+
Model 1 −562.08    66.70   
Model 2 −557.39    68.32   
Model 3 −551.50    69.34   
Model 1 vs. Model 2   4.69 0.002   1.63 0.015
Model 1 vs. Model 3   10.58 <0.001   2.64 0.007
  1. Model 1: age + gender + current smoking; Model 2: Model 1 + max heart rate; Model 3: Model 2 + blunted heart rate recovery; LogLik loglikelihood, Diff difference, c-index Harrell’s concordance index; p-value* is based on the loglikelihood ratio test; p-value+ is based on the Delong’s test