Intended for healthcare professionals

Education And Debate

Why we need observational studies to evaluate the effectiveness of health care

BMJ 1996; 312 doi: https://doi.org/10.1136/bmj.312.7040.1215 (Published 11 May 1996) Cite this as: BMJ 1996;312:1215

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 March 2024

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AbstractFullPdf
Jan 20181332290
Feb 20181052320
Mar 2018851180
Apr 20181051020
May 20181121080
Jun 2018121670
Jul 2018133940
Aug 2018111780
Sep 2018119870
Oct 2018143860
Nov 2018155960
Dec 2018164490
Jan 20191991750
Feb 2019179810
Mar 20192801150
Apr 2019267690
May 2019189850
Jun 2019142640
Jul 2019176720
Aug 2019309930
Oct 2019206840
Nov 2019154920
Dec 2019128650
Jan 20202352380
Feb 20201891280
Mar 2020163500
May 2020299720
Jun 2020212450
Jul 2020287680
Aug 2020196520
Sep 2020269440
Oct 2020363600
Nov 2020210510
Dec 20202971230
Jan 20213721460
Feb 2021246700
Mar 2021209520
Apr 2021180500
May 2021242420
Jun 202198230
Jul 2021135300
Aug 2021153450
Sep 2021144540
Oct 2021183400
Nov 2021210360
Dec 2021172660
Jan 20221741380
Feb 2022235530
Mar 2022222630
Apr 2022202500
May 2022257470
Jun 2022114620
Jul 202290570
Aug 2022121490
Sep 2022169750
Oct 20223731000
Nov 2022258710
Dec 2022225420
Jan 20232361180
Feb 2023169600
Mar 2023261600
Apr 2023172580
May 2023130490
Jun 2023153550
Jul 2023130400
Aug 2023151580
Sep 2023168600
Oct 2023216670
Nov 2023214950
Dec 20234061450
Jan 20244792430
Feb 2024317940
Mar 2024167480
Total1458859830