Intended for healthcare professionals

Education And Debate Systematic reviews in health care

Assessing the quality of controlled clinical trials

BMJ 2001; 323 doi: https://doi.org/10.1136/bmj.323.7303.42 (Published 07 July 2001) Cite this as: BMJ 2001;323:42

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 July 2019

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AbstractFullPdf
Jul 20030151105
Aug 20030172113
Sep 20030144125
Oct 20033243210
Nov 20031226164
Dec 20032144108
Jan 20040177154
Feb 20041268169
Mar 20040343227
Apr 20041201149
May 20040273154
Jun 20047258130
Jul 200411232128
Aug 200410289198
Sep 20047262235
Oct 20049264198
Nov 200423290175
Dec 200425237130
Jan 200523367181
Feb 200524293207
Mar 200514261179
Apr 200514252215
May 200540331247
Jun 200514215176
Jul 200526211160
Aug 200556248238
Sep 200544284218
Oct 200547350236
Nov 200532269206
Dec 200518211170
Jan 200611266248
Feb 200615245255
Mar 200613318305
Apr 200617189230
May 200624274167
Jun 2006718293
Jul 200616166101
Aug 200621189119
Sep 200627266143
Oct 200636372197
Nov 200631264155
Dec 200625155110
Jan 200730290140
Feb 200721235147
Mar 200726256220
Apr 200724243169
May 200736218164
Jun 200723167127
Jul 200729181102
Aug 200728203133
Sep 200734244158
Oct 200743292183
Nov 200755264193
Dec 20071517897
Jan 200822197134
Feb 200840218139
Mar 200843291174
Apr 200831288188
May 200846388197
Jun 200838307138
Jul 200833258120
Aug 200869214121
Sep 2008126226164
Oct 2008161272206
Nov 2008194310207
Dec 2008134345132
Jan 2009227332135
Feb 2009223498123
Mar 2009319538145
Apr 2009268189154
May 2009241187133
Jun 2009212326106
Jul 2009195134141
Aug 2009199141151
Sep 2009206179135
Oct 2009311262161
Nov 2009385325162
Dec 2009266222123
Jan 2010307159131
Feb 2010262161122
Mar 2010445261195
Apr 2010416322194
May 2010427297172
Jun 2010247214110
Jul 2010168342136
Aug 2010154282176
Sep 2010203163104
Oct 2010366175128
Nov 2010505176138
Dec 2010377150105
Jan 201132518294
Feb 2011402193135
Mar 2011500176174
Apr 2011388167151
May 2011420168142
Jun 201135411198
Jul 2011296153144
Aug 2011162220152
Sep 2011182231144
Oct 2011208276162
Nov 2011125412157
Dec 20110433129
Jan 201234820791
Feb 2012337184176
Mar 2012403234129
Apr 201230619466
May 2012291130238
Jun 201213714553
Jul 201226316662
Aug 201211417052
Sep 201216119176
Oct 201231720979
Nov 2012639394163
Dec 201220314557
Jan 201316714856
Feb 201315111625
Mar 201317012040
Apr 201323111322
May 201327913544
Jun 201326911042
Jul 201316311339
Aug 20131559437
Sep 20131829725
Oct 201329516876
Nov 2013457253108
Dec 201335215548
Jan 201422619259
Feb 201430215145
Mar 201435121865
Apr 201435318557
May 201438417564
Jun 201431114958
Jul 201417566130
Aug 201444311658
Sep 201438112462
Oct 20141815140
Nov 201442613870
Dec 201456917083
Jan 201542516274
Feb 2015300185103
Mar 201541119481
Apr 201544720286
May 201536616772
Jun 201522311863
Jul 20152047853
Aug 201525312539
Sep 201530114157
Oct 201537017232
Nov 201562328185
Dec 201549721049
Jan 201651825268
Feb 201634714631
Mar 201629211140
Apr 20162529537
May 201631011056
Jun 201619910535
Jul 201617621119
Aug 20161769032
Sep 20162249544
Oct 201625210549
Nov 201639416483
Dec 201624513450
Jan 201721612243
Feb 201722813549
Mar 201727514748
Apr 201724910934
May 201724314252
Jun 201727711734
Jul 201716410417
Aug 201722511931
Sep 201725415042
Oct 201730815955
Nov 201731012749
Dec 201722615552
Jan 201835719650
Feb 201842121860
Mar 201839027271
Apr 201844724961
May 2018661260107
Jun 201832916236
Jul 201823015237
Aug 201843114943
Sep 201830612531
Oct 201847821075
Nov 201839422171
Dec 201852120557
Jan 201945315367
Feb 201926214144
Mar 201934915166
Apr 201937317076
May 201944317956
Jun 201927912676
Jul 20191303917
Total406554003721783