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Table 1 Summary overview of included articles *

From: External validation of multivariable prediction models: a systematic review of methodological conduct and reporting

Study aim Cardiovascular (n = 18) Oncology (n = 22) Other (n = 38) Aim of prediction model Total articles (n = 78) Number of models (n = 120)
Diagnostic (n = 19) Prognostic (n = 59)
Model development with temporal-split validation 3 (4) 1 (1) 8 (10) 2 (3) 10 (13) 12 (15) 14 (12)
Model development with external validation 7 (9) 6 (8) 8 (10) 3 (4) 18 (23) 21 (27) 38 (32)
External validation only 8 (10) 15 (19) 22 (28) 14 (18) 31 (40) 45 (58) 68 (57)
  1. *Percentages are in given parentheses.