Hi Julie – no, that won't work. You need to go to studies and analyses (some of which I've done myself). It's not at fingertips, because for example the "date last updated" was changed for every single Cochrane review when a particular issue of RevMan was released. So establishing the currency of Cochrane reviews is not simple.
Less than half are up-to-date. How low the proportion is, depends on how much effort you've put into accurately dating the reviews. When I and some colleagues established a cohort of Cochrane reviews published in the early years, to follow through on their history, identifying when there had been a search for new evidence was a laborious and complex project, requiring triangulation between multiple sources (both PubMed and the CDSR) - you cannot reliably establish the currency of a large proportion of Cochrane reviews from the data in the CDSR. This is partly to do with recording practices at different Cochrane groups, partly to do with changeovers of software and partly to do with changeover of commercial publisher. Bottom line though, if you go to a Cochrane review as your source of evidence, more likely than not it will be out-of-date. And which source you go to find the Cochrane review will determine what proportion are up-to-date as well.
Hilda
From: Julie Glanville <[log in to unmask]<mailto:[log in to unmask]>>
Reply-To: Julie Glanville <[log in to unmask]<mailto:[log in to unmask]>>
Date: Friday, February 8, 2013 11:44 AM
To: "[log in to unmask]<mailto:[log in to unmask]>" <[log in to unmask]<mailto:[log in to unmask]>>
Subject: Re: Cochrane - number of up to date SRs
Hi Jon, why don't you contact the Cochrane editorial unit - they will have all this at their finger tips I expect?
http://www.editorial-unit.cochrane.org/
Regards
Julie
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On 8 February 2013 11:29, Jon Brassey <[log in to unmask]<mailto:[log in to unmask]>> wrote:
Hi All,
Does anyone have a reasonable estimate of the number of Cochrane systematic reviews that are considered up-to-date?
I appreciate that problematic as how do you define up-to-date? On one hand you could say any looked at in the last one or two years (seems fairly reasonable). One could also make the case that none are up-to-date due to the time it takes to publish after the initial search (which must be at least 12 months).
But if you have a view, post it and we can see if any consensus figure is arrived at.
Also, Cochrane finances, I'm trying to get a figure for their annual budget. I think it's around £20 million (23.5 million Euros or 31.5 million US dollars) - can anyone please confirm this or give me an accurate figure.
Ta
jon
--
Jon Brassey
Trip Database
http://www.tripdatabase.com
Find evidence fast
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