Table 1

Characteristics of publications investigated in this study

Number of publications
(n=1112)
%
The number of events
 <21474.2
 21–5012211.0
 51–100968.6
 >10084776.2
Impact factor
 Under 212711.4
 2–<416014.4
 4–<639735.7
 6 or over42838.5
Medical statistics experts are included as
First authorCo-author
 No No41837.6
 No Yes32128.9
 Yes Either37333.5