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Calculating the number needed to treat for trials where the outcome is time to an event

BMJ 1999; 319 doi: https://doi.org/10.1136/bmj.319.7223.1492 (Published 04 December 1999) Cite this as: BMJ 1999;319:1492

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 2003012079
Aug 2003011160
Sep 2003012778
Oct 2003014895
Nov 20030157115
Dec 2003023063
Jan 2004011368
Feb 2004012371
Mar 20040211126
Apr 20040188102
May 2004526299
Jun 20042270100
Jul 2004217494
Aug 20045215132
Sep 2004320782
Oct 20048271128
Nov 20046180114
Dec 20042720578
Jan 20051411362
Feb 20051011573
Mar 200511267129
Apr 20052181125
May 2005119188
Jun 200514195106
Jul 200598061
Aug 200511254130
Sep 20051274104
Oct 20054356110
Nov 200514274117
Dec 2005320488
Jan 2006935890
Feb 20061031187
Mar 20061027884
Apr 2006627079
May 2006729484
Jun 2006531177
Jul 2006420255
Aug 2006326566
Sep 20061436473
Oct 20066442102
Nov 20064432115
Dec 2006632671
Jan 20075385108
Feb 2007439575
Mar 2007636459
Apr 2007839983
May 20071245981
Jun 2007934354
Jul 2007329180
Aug 2007835463
Sep 2007334083
Oct 2007344477
Nov 20071041977
Dec 2007433353
Jan 2008647657
Feb 2008756282
Mar 2008646951
Apr 2008754374
May 2008246967
Jun 2008444654
Jul 2008242358
Aug 2008240560
Sep 2008541463
Oct 2008147363
Nov 20080597155
Dec 2008435986
Jan 200922124167
Feb 200924519263
Mar 200931122576
Apr 200927219564
May 200925817770
Jun 200927520562
Jul 200927716961
Aug 200926616553
Sep 200933921160
Oct 200936323455
Nov 200939723281
Dec 200937720850
Jan 201038024743
Feb 201037924562
Mar 201055932586
Apr 201046430782
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Jul 201037918243
Aug 201042323974
Sep 201065924067
Oct 201089323261
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Jun 20113299142
Jul 201116715936
Aug 20113834676
Sep 20115434273
Oct 2011109545104
Nov 2011839457
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Feb 201233613840
Mar 20121648236
Apr 20121497126
May 2012796246
Jun 2012665525
Jul 2012166216
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Oct 2012846920
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Dec 2012343710
Jan 2013413510
Feb 201334317
Mar 2013543611
Apr 2013596112
May 2013526926
Jun 2013728033
Jul 2013554322
Aug 2013473014
Sep 2013527225
Oct 2013816616
Nov 20131415718
Dec 20131065419
Jan 201487398
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Mar 2014644817
Apr 2014606520
May 2014488117
Jun 2014657527
Jul 201419428
Aug 2014423322
Sep 2014423717
Oct 2014452412
Nov 201462197
Dec 2014532712
Jan 2015623520
Feb 201548288
Mar 2015314017
Apr 2015673610
May 20153411636
Jun 2015446522
Jul 2015543825
Aug 201546225
Sep 20151093916
Oct 2015588719
Nov 20151187318
Dec 201585318
Jan 20161543210
Feb 201691417
Mar 2016733415
Apr 2016734522
May 20161454930
Jun 20161314421
Jul 2016754011
Aug 2016883724
Sep 2016804619
Oct 2016755123
Nov 2016744416
Dec 20161332712
Jan 2017864919
Feb 2017884218
Mar 2017876430
Apr 2017855724
May 2017735726
Jun 2017994417
Jul 20171164520
Aug 2017965929
Sep 20171047736
Oct 20171085423
Nov 2017984716
Dec 201757379
Jan 2018715512
Feb 2018777126
Mar 2018665921
Apr 2018707024
May 20181176928
Jun 201869526
Jul 20181086617
Aug 2018805711
Sep 2018685710
Oct 2018987214
Nov 20181154416
Dec 2018110308
Jan 20192306513
Feb 20191094419
Mar 2019574516
Apr 2019755923
May 201911118548
Jun 2019869812
Jul 2019975624
Aug 2019905617
Sep 20191439336
Oct 201911811234
Nov 2019676418
Dec 2019873114
Jan 2020663914
Total21674338549808