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Table 1 Number of articles using multiple imputation from January 2008 to December 2013 by type of study

From: The rise of multiple imputation: a review of the reporting and implementation of the method in medical research

  Journal’s name  
Type of studies Lancet New England Journal of Medicine All Studies
  (n = 58) (n = 45) (n = 103)
Trials    
    Randomised controlled trials 35 34 69
    Non-randomised controlled trialsa 2 2 4
Total 37 36 73
Observational studies    
    Prospective studies 11 7 18
    Retrospective studiesb 6 1 7
    Cross-sectional studies 3 0 3
    Case–control studies 1 1 2
Total 21 9 30
  1. aQuasi- experimental studies; bRetrospective studies- these are studies which performed a retrospective analysis of routinely collected data.