Bypassing the selection rule in choosing controls for a case–control study

Keith T Palmer; Miranda Kim; David Coggon

doi:10.1136/oem.2009.050674

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Original article

Methodology

Bypassing the selection rule in choosing controls for a case–control study

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	Abstract	Full	Pdf
Oct 2010	95	2	4
Nov 2010	165	10	29
Dec 2010	57	7	14
Jan 2011	24	5	11
Feb 2011	10	2	4
Mar 2011	17	4	6
Apr 2011	14	8	11
May 2011	5	1	0
Jun 2011	9	3	3
Jul 2011	20	0	1
Aug 2011	12	2	5
Sep 2011	25	2	7
Oct 2011	13	0	1
Nov 2011	49	4	5
Dec 2011	44	2	2
Jan 2012	43	1	2
Feb 2012	21	0	1
Mar 2012	27	2	2
Apr 2012	9	0	0
May 2012	20	5	7
Jun 2012	13	0	0
Jul 2012	23	1	0
Aug 2012	16	1	1
Sep 2012	14	3	0
Oct 2012	15	0	0
Nov 2012	22	0	0
Dec 2012	26	1	1
Jan 2013	23	1	0
Feb 2013	27	2	2
Mar 2013	21	0	0
Apr 2013	15	1	2
May 2013	11	2	4
Jun 2013	5	0	0
Jul 2013	13	0	1
Aug 2013	10	1	2
Sep 2013	12	2	2
Oct 2013	7	1	1
Nov 2013	12	0	0
Dec 2013	20	0	0
Jan 2014	1	0	0
Feb 2014	11	0	1
Mar 2014	13	0	0
Apr 2014	16	0	0
May 2014	33	2	1
Jun 2014	12	0	0
Jul 2014	12	0	0
Aug 2014	4	0	0
Sep 2014	15	1	1
Oct 2014	10	1	1
Nov 2014	13	0	0
Dec 2014	12	1	1
Jan 2015	15	0	0
Feb 2015	9	0	0
Mar 2015	15	0	1
Apr 2015	7	0	0
May 2015	8	0	0
Jun 2015	15	0	1
Jul 2015	4	0	0
Aug 2015	3	0	0
Sep 2015	9	0	0
Oct 2015	2	0	0
Nov 2015	1	0	0
Dec 2015	9	0	2
Jan 2016	18	0	0
Feb 2016	10	0	0
Mar 2016	6	1	0
Apr 2016	2	1	1
May 2016	5	0	0
Jun 2016	4	0	0
Jul 2016	4	0	0
Aug 2016	4	0	0
Sep 2016	4	0	0
Oct 2016	9	2	3
Nov 2016	7	2	1
Dec 2016	11	0	0
Jan 2017	7	0	0
Feb 2017	7	0	0
Mar 2017	10	0	0
Apr 2017	5	1	1
May 2017	5	0	0
Jun 2017	12	0	0
Jul 2017	14	0	0
Aug 2017	14	0	0
Sep 2017	22	1	1
Oct 2017	19	1	0
Nov 2017	27	0	0
Dec 2017	53	0	0
Jan 2018	13	1	1
Feb 2018	30	0	0
Mar 2018	35	3	0
Apr 2018	22	1	0
May 2018	20	1	0
Jun 2018	30	0	0
Jul 2018	12	0	0
Aug 2018	11	1	0
Sep 2018	7	1	1
Oct 2018	18	1	0
Nov 2018	11	0	0
Dec 2018	24	0	0
Jan 2019	14	0	0
Feb 2019	16	0	0
Mar 2019	10	0	0
Apr 2019	17	0	0
May 2019	26	0	0
Jun 2019	9	2	0
Jul 2019	1	1	0
Aug 2019	2	0	0
Sep 2019	2	0	0
Oct 2019	4	0	0
Nov 2019	15	0	0
Dec 2019	6	0	0
Jan 2020	10	0	0
Feb 2020	12	0	0
Mar 2020	4	0	0
Apr 2020	4	0	0
May 2020	2	0	0
Jun 2020	7	0	0
Jul 2020	18	0	2
Aug 2020	8	1	0
Sep 2020	18	0	0
Oct 2020	46	2	1
Nov 2020	17	0	0
Dec 2020	12	0	0
Jan 2021	11	1	1
Feb 2021	6	0	0
Mar 2021	8	0	0
Apr 2021	16	0	0
May 2021	3	0	0
Aug 2021	0	0	2
Sep 2021	3	3	3
Oct 2021	12	1	0
Nov 2021	4	0	0
Dec 2021	18	2	2
Jan 2022	13	1	0
Feb 2022	14	0	0
Mar 2022	26	4	0
Apr 2022	15	1	0
May 2022	38	0	0
Jun 2022	46	0	0
Jul 2022	28	1	1
Aug 2022	34	1	0
Sep 2022	39	1	0
Oct 2022	58	2	0
Nov 2022	25	1	1
Dec 2022	13	0	0
Jan 2023	15	3	0
Feb 2023	7	1	0
Mar 2023	8	0	0
Apr 2023	12	0	0
May 2023	12	0	0
Jun 2023	4	0	0
Jul 2023	11	1	0
Aug 2023	5	1	0
Sep 2023	4	0	0
Oct 2023	20	2	0
Nov 2023	4	1	0
Dec 2023	39	1	0
Jan 2024	12	0	1
Feb 2024	2	0	1
Mar 2024	11	0	0
Total	2621	134	164

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