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Observational study design II

BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d1903 (Published 31 March 2011) Cite this as: BMJ 2011;342:d1903

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 May 2025

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AbstractFullPdf
Jan 20181043
Feb 20181210
Mar 20181020
Apr 20181272
May 20181642
Jun 20181041
Jul 2018652
Aug 2018921
Sep 2018420
Oct 2018632
Nov 2018751
Dec 2018761
Jan 2019722
Feb 20191600
Mar 2019620
Apr 2019481
May 2019831
Jun 2019222
Jul 2019352
Aug 2019510
Oct 2019323
Nov 2019745
Dec 2019770
Jan 20201111
Feb 20201574
Mar 2020821
May 20201521
Jun 2020612
Jul 20203254
Aug 20204035
Sep 20202264
Oct 2020744
Nov 2020937
Dec 2020953
Jan 20211458
Feb 20211143
Mar 20212248
Apr 20211825
May 20211202
Jun 2021901
Jul 20211209
Aug 20211013
Sep 20212835
Oct 20212116
Nov 2021301
Dec 2021922
Jan 20221064
Feb 2022334
Mar 2022710
Apr 2022702
May 2022710
Jun 2022511
Jul 2022800
Aug 2022500
Sep 20221201
Oct 20221401
Nov 20221222
Dec 2022410
Jan 2023520
Feb 2023770
Mar 2023200
Apr 20231513
May 2023510
Jun 2023900
Jul 2023861
Aug 20231070
Sep 20231411
Oct 2023920
Nov 2023531
Dec 20233920
Jan 20242610
Feb 20241400
Mar 2024900
Apr 2024200
May 2024800
Jun 2024931
Jul 20241720
Aug 20241700
Sep 20241100
Oct 2024300
Nov 2024100
Dec 2024440
Jan 20253220
Feb 2025400
Mar 20251321
Apr 20254210
May 2025800
Total962204143
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