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Table 1 General characteristics of the 77 randomized controlled trials published July – December 2013

From: Handling missing data in RCTs; a review of the top medical journals

  N (%)
Journal  
 BMJ 8 (10)
 JAMA 26 (34)
 Lancet 22 (29)
 NEJM 21 (27)
Number of centers involved  
 Single 21 (27)
 Multiple 56 (73)
Type of outcome  
 Quantitative 42 (55)
 Binary 35 (45)
How often outcome was collected  
 Single 16 (21)
 Repeated 61 (79)
How outcome was treated in the primary analysis  
 Single 63 (82)
 Repeated 14 (18)
Reported CONSORT flow diagram 76 (99)
Reported primary analysis was intention-to-treat or modified intention-to-treat 66 (86)