Skip to main content

Advertisement

Table 5 Evaluating performance of risk prediction modelsa

From: Developing risk prediction models for type 2 diabetes: a systematic review of methodology and reporting

Parameter Number of studies (%)
Validation  
   Apparent 30 (77%)
   Internal 15 (38%)
Bootstrapping 2 (5%)
Jack-knifing 1 (3%)
Random split sample 10 (26%)
Cross-validation 2 (5%)
   Temporal 3 (8%)
   External 21 (54%)
Performance metricsb  
   Discrimination  
C-statistic 39 (100%)
D-statistic 1 (3%)
Calibrationc 10 (26%)
Hosmer-Lemeshow statistic 8 (21%)
Calibration plot 2 (5%)
   Classification  
Reclassification (NRI) 2 (5%)
Other (for example, sensitivity, specificity) 31 (79%)
  1. aNRI,- Net Reclassification Index; bstudies can report more than one performance metric; ccalibration assessed on the basis of the development cohort in 10 studies and in the validation cohorts in 2 studies.