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Estimating sample sizes for binary, ordered categorical, and continuous outcomes in two group comparisons

BMJ 1995; 311 doi: https://doi.org/10.1136/bmj.311.7013.1145 (Published 28 October 1995) Cite this as: BMJ 1995;311:1145

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: January 2018 to December 2022

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AbstractFullPdf
Jan 201879380
Feb 201878440
Mar 201898760
Apr 201892530
May 201888490
Jun 2018116680
Jul 2018107760
Aug 2018173830
Sep 2018180680
Oct 2018268900
Nov 2018160700
Dec 2018111380
Jan 2019102430
Feb 201986450
Mar 2019109770
Apr 201984340
May 201951210
Jun 201978190
Jul 201962310
Aug 201946250
Oct 2019107770
Nov 201958430
Dec 201959190
Jan 2020102310
Feb 202069520
Mar 202090310
May 2020242420
Jun 202085170
Jul 2020226220
Aug 2020195250
Sep 2020167560
Oct 2020222290
Nov 2020267990
Dec 2020122420
Jan 2021107350
Feb 2021137260
Mar 2021105210
Apr 202184300
May 2021146280
Jun 202182340
Jul 202168140
Aug 202198250
Sep 2021107390
Oct 2021205840
Nov 2021143810
Dec 202166270
Jan 202288280
Feb 202276290
Mar 2022134260
Apr 2022139390
May 202277420
Jun 202296530
Jul 2022104400
Aug 2022108320
Sep 2022109570
Oct 2022137290
Nov 2022153770
Dec 202238100
Total678625390