Intended for healthcare professionals

Education And Debate

Systematic Reviews: Meta-analysis and its problems

BMJ 1994; 309 doi: https://doi.org/10.1136/bmj.309.6957.789 (Published 24 September 1994) Cite this as: BMJ 1994;309:789

Article usage

Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.

Usage statistics: July 2003 to January 2020

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AbstractFullPdf
Jul 20030470
Aug 20030710
Sep 20030940
Oct 20030760
Nov 200301200
Dec 20030990
Jan 200401130
Feb 200411410
Mar 200401560
Apr 200401400
May 20044960
Jun 200401180
Jul 20040910
Aug 200451090
Sep 200491340
Oct 20043700
Nov 200481150
Dec 2004201010
Jan 2005161480
Feb 2005131000
Mar 20056820
Apr 200510770
May 20058910
Jun 20058530
Jul 20051540
Aug 20053530
Sep 20052420
Oct 200531340
Nov 200541120
Dec 20057970
Jan 20067820
Feb 200691060
Mar 20067880
Apr 200621030
May 20067830
Jun 20063650
Jul 20067800
Aug 20061680
Sep 200671060
Oct 200661480
Nov 200651490
Dec 20061890
Jan 200731100
Feb 200751310
Mar 200741690
Apr 200751730
May 200771900
Jun 2007512730
Jul 2007131150
Aug 200771670
Sep 200781570
Oct 200772170
Nov 2007152320
Dec 2007101550
Jan 2008232300
Feb 2008181871
Mar 2008132340
Apr 2008172590
May 2008101970
Jun 200891692
Jul 200861340
Aug 2008111200
Sep 200891630
Oct 2008242470
Nov 2008111770
Dec 200891250
Jan 2009731020
Feb 2009981010
Mar 20091551410
Apr 20091701180
May 2009136950
Jun 2009103750
Jul 2009102850
Aug 200999860
Sep 200985840
Oct 2009110860
Nov 20091481060
Dec 2009113810
Jan 2010145690
Feb 2010152960
Mar 20101881530
Apr 20101731100
May 2010138970
Jun 2010127820
Jul 2010102760
Aug 201088820
Sep 2010147740
Oct 2010204620
Nov 2010259750
Dec 2010195560
Jan 2011210770
Feb 2011217860
Mar 2011242790
Apr 2011224450
May 2011164720
Jun 2011142530
Jul 201169560
Aug 2011231490
Sep 201117960
Oct 2011211900
Nov 201192350
Dec 201102030
Jan 2012118860
Feb 2012130540
Mar 2012136420
Apr 2012147800
May 201225390
Jun 2012382350
Jul 201229530
Aug 201236470
Sep 201242330
Oct 201282270
Nov 201295380
Dec 201264230
Jan 201357190
Feb 201374190
Mar 201352220
Apr 201364200
May 2013117330
Jun 201378260
Jul 201380210
Aug 201359240
Sep 201379230
Oct 2013138340
Nov 2013264360
Dec 2013178350
Jan 201497220
Feb 2014121320
Mar 2014205290
Apr 2014203440
May 2014172200
Jun 2014208390
Jul 201411920
Aug 2014127230
Sep 201456130
Oct 20145670
Nov 201482210
Dec 2014134170
Jan 2015162400
Feb 2015388160125
Mar 20151334810
Apr 2015150221
May 201582171
Jun 2015712513
Jul 20154493
Aug 201569289
Sep 20155090
Oct 201584190
Nov 201582250
Dec 201551190
Jan 201683320
Feb 201647230
Mar 20169612190
Apr 2016104360
May 201688230
Jun 201669150
Jul 201678282
Aug 201649120
Sep 2016622713
Oct 2016698775
Nov 201675390
Dec 201666200
Jan 201771130
Feb 201792210
Mar 201769310
Apr 201782220
May 20177560
Jun 201758190
Jul 20177790
Aug 201791260
Sep 2017145340
Oct 2017184440
Nov 2017186420
Dec 2017203490
Jan 2018184520
Feb 2018117480
Mar 2018171640
Apr 2018143650
May 2018137340
Jun 2018103200
Jul 2018139130
Aug 201875290
Sep 201893260
Oct 2018121370
Nov 2018149400
Dec 2018121430
Jan 2019151190
Feb 2019102230
Mar 2019143320
Apr 2019170330
May 201991400
Jun 201975160
Jul 201971250
Aug 201970160
Sep 201944190
Oct 201968150
Nov 201966160
Dec 201962200
Jan 202050110
Total1542515249345