Skip to main content

Table 2 Characteristics of systematic reviews (n = 29)

From: Journal impact factor, trial effect size, and methodological quality appear scantly related: a systematic review and meta-analysis

Systematic reviews
RCTs included per review, mean7
Publication date, mean (range)2004 (1998 to 2008)
2 or more independent data extractors93%
Active control37%
Topic areas
 Surgery (including anesthesia)15%