Intended for healthcare professionals

Education And Debate

Weighted comparison of means

BMJ 1998; 316 doi: https://doi.org/10.1136/bmj.316.7125.129 (Published 10 January 1998) Cite this as: BMJ 1998;316:129

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 August 2019

Rendering graph...
AbstractFullPdf
Jul 200301110
Aug 200301330
Sep 200301730
Oct 200302120
Nov 200301440
Dec 200301720
Jan 200461410
Feb 200411330
Mar 200411791
Apr 200411880
May 200402400
Jun 200462100
Jul 200401750
Aug 200402320
Sep 200452870
Oct 200462321
Nov 2004151900
Dec 2004201980
Jan 2005121610
Feb 2005630820
Mar 2005316182
Apr 2005218886
May 2005012976
Jun 2005211569
Jul 2005128561
Aug 2005424273
Sep 2005441595
Oct 20057386120
Nov 2005340795
Dec 2005325755
Jan 2006651691
Feb 2006148163
Mar 2006049788
Apr 2006239456
May 2006249374
Jun 20066529103
Jul 2006645678
Aug 2006351161
Sep 2006591757
Oct 2006357767
Nov 2006545576
Dec 2006438558
Jan 2007649255
Feb 2007259140
Mar 20071062748
Apr 2007154746
May 2007052859
Jun 2007242040
Jul 2007544642
Aug 2007053850
Sep 2007360269
Oct 2007162172
Nov 2007260362
Dec 2007344544
Jan 2008368648
Feb 2008076163
Mar 2008461874
Apr 2008166554
May 2008168866
Jun 2008069965
Jul 2008454158
Aug 2008347062
Sep 2008258455
Oct 2008358544
Nov 2008246535
Dec 2008138552
Jan 200931520953
Feb 200937219246
Mar 200941121457
Apr 200937219550
May 200926216645
Jun 200930813134
Jul 200921911331
Aug 200922912022
Sep 200926211838
Oct 200929114439
Nov 200927915143
Dec 200926911532
Jan 201024814536
Feb 201030913639
Mar 201034616447
Apr 201032613533
May 201028416844
Jun 201025512436
Jul 201025214530
Aug 201023711938
Sep 201033011261
Oct 20103998342
Nov 201036310146
Dec 20102338142
Jan 20113058933
Feb 201127010247
Mar 20112677547
Apr 20111527248
May 20111486629
Jun 20111347042
Jul 201113711139
Aug 2011522850
Sep 2011522865
Oct 20111031675
Nov 2011220755
Dec 2011024064
Jan 201212211034
Feb 20121385831
Mar 20121017237
Apr 2012597234
May 2012143021
Jun 2012102212
Jul 201223514
Aug 201295926
Sep 2012153720
Oct 2012373516
Nov 2012505525
Dec 2012261914
Jan 201317228
Feb 201315166
Mar 201322259
Apr 2013284310
May 2013233213
Jun 2013332411
Jul 2013393421
Aug 2013293314
Sep 2013273314
Oct 2013304512
Nov 2013735219
Dec 2013636820
Jan 2014584010
Feb 2014333312
Mar 2014636620
Apr 2014546026
May 2014555313
Jun 2014685019
Jul 201417328
Aug 2014135832
Sep 201406324
Oct 201403314
Nov 201406533
Dec 201409658
Jan 2015016465
Feb 201508855
Mar 201508148
Apr 201508863
May 201505948
Jun 201505946
Jul 201505035
Aug 201506352
Sep 201506837
Oct 201506826
Nov 201519454
Dec 2015012441
Jan 201609131
Feb 2016011135
Mar 2016010935
Apr 201609551
May 2016010242
Jun 201618830
Jul 201606630
Aug 201617939
Sep 201609263
Oct 201609437
Nov 2016012042
Dec 201619636
Jan 201718525
Feb 2017011737
Mar 2017012732
Apr 2017011836
May 2017014240
Jun 2017011335
Jul 2017013944
Aug 2017014626
Sep 2017012134
Oct 2017016039
Nov 2017021651
Dec 2017016728
Jan 2018017335
Feb 2018519139
Mar 2018225749
Apr 2018029042
May 2018024246
Jun 2018228049
Jul 2018224431
Aug 2018025936
Sep 2018025729
Oct 2018030246
Nov 2018027446
Dec 2018018936
Jan 2019119248
Feb 2019123665
Mar 2019229944
Apr 2019124745
May 2019318933
Jun 2019018122
Jul 2019118432
Aug 2019210316
Total10170415177574