Skip to main content

Table 2 Sample size

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

  Development & validation articles (n = 33) Validation only
Development Validation (n = 45)
Sample size    
  Explanation of sample size reported Information not extracted 2 (6) 4 (9)
  Articles where the number of participants were reported 33 (100) 32 (97) 44 (98)
  Median number of participants (range) 1360 (68, 17589824) 1041 (87, 1117123) 694 (49, 797373)
  Articles where the number of events were reported 28 (85) 26 (79) 36 (80)
  Median number of events (range) 189 (12, 90324) 100 (14, 3623) 108 (6, 42408)
  1. Percentages are in given parentheses.