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Research Article

Sample size for beginners.

British Medical Journal 1993; 306 doi: https://doi.org/10.1136/bmj.306.6886.1181 (Published 01 May 1993) Cite this as: British Medical Journal 1993;306:1181

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 October 2024

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AbstractFullPdf
Jan 201826012
Feb 201826023
Mar 201846026
Apr 201874051
May 201835026
Jun 201846022
Jul 201831025
Aug 201827027
Sep 201821046
Oct 201837042
Nov 2018420155
Dec 201899092
Jan 2019230109
Feb 2019290100
Mar 201941074
Apr 201949043
May 201937043
Jun 201936043
Jul 201935041
Aug 201963053
Oct 201937040
Nov 201966062
Dec 201944032
Jan 202021045
Feb 202034059
Mar 202036045
May 202037055
Jun 202051064
Jul 202051039
Aug 202036051
Sep 202042039
Oct 202055059
Nov 202068070
Dec 202044074
Jan 202166097
Feb 202148085
Mar 202153078
Apr 2021650118
May 2021690110
Jun 2021760131
Jul 2021510136
Aug 202165069
Sep 202165047
Oct 202155088
Nov 202180091
Dec 202175086
Jan 202297092
Feb 2022880129
Mar 20221810147
Apr 20222680134
May 20222630130
Jun 20222470102
Jul 20221740106
Aug 20222040102
Sep 2022170088
Oct 20222260128
Nov 20222200103
Dec 2022262093
Jan 2023177085
Feb 20232030107
Mar 20232940159
Apr 20232750115
May 20232970116
Jun 2023189060
Jul 2023194056
Aug 2023284089
Sep 2023237094
Oct 2023219076
Nov 2023120042
Dec 2023114038
Jan 202472025
Feb 202492043
Mar 202466070
Apr 202495064
May 202499047
Jun 202458028
Jul 202465041
Aug 202463023
Sep 202461018
Oct 202412012
Total789905685
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