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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.