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Sample size determinations in original research protocols for randomised clinical trials submitted to UK research ethics committees: review

BMJ 2013; 346 doi: https://doi.org/10.1136/bmj.f1135 (Published 21 March 2013) Cite this as: BMJ 2013;346:f1135

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: March 2013 to January 2021

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AbstractFullPdf
Mar 201301781222
Apr 201301466208
May 20133951136
Jun 2013433158
Jul 2013535774
Aug 2013329664
Sep 2013133370
Oct 2013028359
Nov 2013433571
Dec 2013122250
Jan 2014023845
Feb 2014021546
Mar 2014026051
Apr 2014029050
May 2014022780
Jun 2014015838
Jul 201409250
Aug 2014010725
Sep 201405617
Oct 201413615
Nov 201417519
Dec 201405818
Jan 201516617
Feb 201536630
Mar 201509826
Apr 2015011330
May 20150939
Jun 2015110027
Jul 2015012414
Aug 201529222
Sep 2015116027
Oct 2015021811
Nov 2015018025
Dec 2015215112
Jan 2016316914
Feb 2016515425
Mar 2016015216
Apr 2016013120
May 2016621315
Jun 2016518510
Jul 2016017816
Aug 2016114818
Sep 2016219522
Oct 2016017212
Nov 2016214920
Dec 201607310
Jan 201709615
Feb 2017010015
Mar 201709615
Apr 20170908
May 2017010924
Jun 201709112
Jul 201709918
Aug 20170966
Sep 201708314
Oct 2017010413
Nov 2017011721
Dec 2017010717
Jan 2018012019
Feb 201828213
Mar 2018315517
Apr 2018017524
May 2018520614
Jun 2018214419
Jul 2018211914
Aug 2018011912
Sep 201808514
Oct 2018011314
Nov 20180819
Dec 20180649
Jan 201904922
Feb 20191715
Mar 2019110317
Apr 2019010617
May 201919522
Jun 20190869
Jul 2019011210
Aug 2019210515
Sep 201919412
Oct 2019011013
Nov 201918928
Dec 2019213821
Jan 20201896
Feb 2020212323
Mar 202018114
Apr 202006110
May 2020211917
Jun 202009710
Jul 2020820518
Aug 202041818
Sep 20202827
Oct 2020013320
Nov 2020314232
Dec 2020512015
Jan 202177721
Total115168662662