How quickly do systematic reviews go out of date? A survival analysis

Ref ID 155
First Author K. G. Shojania
Year Of Publishing 2007
Keywords General medical
Problem(s) Untimely (taking too long) or resource intensive
Not updated regularly
Number of systematic reviews included 100
Summary of Findings Survival analysis of 100 meta-analyses indexed in American College of Physicians Journal Club from 1995 to 2005 found that new evidence that substantively changed conclusions about the effectiveness or harms of therapies arose frequently and within relatively short time periods. The median survival time without substantive new evidence for the meta-analyses was 5.5 years. Significant new evidence was already available for 7% of the reviews at the time of publication and became available for 23% within 2 years.
Did the article find that the problem(s) led to qualitative changes in interpretation of the results? Not Applicable
Are the methods of the article described in enough detail to replicate the study? Yes