Immortal time bias in estimates of mortality among infliximab-treated patients with Crohn's disease

James D Lewis

doi:10.1136/gut.2009.191015

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Letter

Immortal time bias in estimates of mortality among infliximab-treated patients with Crohn's disease

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	Abstract	Full	Pdf
Aug 2010	35	9	24
Oct 2010	137	77	46
Nov 2010	73	70	42
Dec 2010	17	23	12
Jan 2011	9	27	10
Feb 2011	14	29	11
Mar 2011	14	5	3
Apr 2011	8	5	4
May 2011	20	1	2
Jun 2011	16	2	1
Jul 2011	27	1	1
Aug 2011	15	10	7
Sep 2011	17	1	5
Oct 2011	18	5	0
Nov 2011	30	3	1
Dec 2011	18	0	0
Jan 2012	10	3	2
Feb 2012	15	1	3
Mar 2012	12	1	2
Apr 2012	9	1	1
May 2012	15	1	0
Jun 2012	13	3	2
Jul 2012	13	3	2
Aug 2012	17	3	1
Sep 2012	9	2	0
Oct 2012	9	1	1
Nov 2012	0	2	4
Dec 2012	0	2	2
Jan 2013	0	1	3
Feb 2013	0	1	1
May 2013	0	3	1
Jun 2013	5	4	1
Jul 2013	1	1	2
Aug 2013	9	3	3
Sep 2013	5	0	2
Oct 2013	7	0	1
Nov 2013	3	1	0
Dec 2013	8	0	1
Jan 2014	3	2	2
Feb 2014	4	1	1
Mar 2014	3	0	0
Apr 2014	2	0	0
May 2014	4	1	1
Jun 2014	2	0	0
Jul 2014	14	2	2
Aug 2014	3	0	1
Sep 2014	6	2	0
Oct 2014	5	1	2
Nov 2014	3	0	0
Dec 2014	5	1	0
Jan 2015	1	1	1
Feb 2015	3	2	1
Mar 2015	16	1	0
Apr 2015	3	0	0
Jun 2015	7	1	3
Jul 2015	1	2	1
Aug 2015	4	0	1
Sep 2015	6	3	3
Oct 2015	0	1	1
Nov 2015	4	3	3
Jan 2016	0	3	1
Feb 2016	1	1	2
Mar 2016	7	0	0
Apr 2016	0	1	0
Jun 2016	4	0	0
Jul 2016	7	1	0
Aug 2016	2	1	0
Sep 2016	5	2	1
Oct 2016	11	4	2
Nov 2016	4	1	1
Dec 2016	2	0	1
Jan 2017	3	0	1
Feb 2017	7	1	1
Mar 2017	3	1	1
Apr 2017	6	0	0
May 2017	2	1	1
Jun 2017	6	1	0
Jul 2017	20	0	0
Aug 2017	13	1	0
Sep 2017	15	1	2
Oct 2017	10	0	0
Nov 2017	41	1	2
Dec 2017	8	0	0
Jan 2018	21	2	1
Feb 2018	24	2	2
Mar 2018	25	0	0
Apr 2018	11	1	0
May 2018	18	0	0
Jun 2018	29	0	0
Jul 2018	10	0	0
Aug 2018	14	3	1
Sep 2018	18	0	0
Oct 2018	9	1	1
Nov 2018	14	1	1
Dec 2018	16	0	0
Jan 2019	14	0	0
Feb 2019	7	2	1
Mar 2019	8	0	0
Apr 2019	12	0	0
May 2019	3	1	2
Jun 2019	3	1	1
Jul 2019	5	1	0
Aug 2019	8	0	1
Sep 2019	11	3	1
Oct 2019	30	2	3
Nov 2019	6	0	0
Dec 2019	8	0	0
Jan 2020	12	2	1
Feb 2020	10	0	0
Mar 2020	4	0	0
Apr 2020	14	0	0
Jun 2020	10	0	0
Jul 2020	12	0	0
Aug 2020	15	2	0
Sep 2020	19	1	0
Oct 2020	11	0	0
Nov 2020	12	0	0
Dec 2020	18	0	0
Jan 2021	22	1	1
Feb 2021	8	0	0
Mar 2021	9	1	2
Apr 2021	9	2	1
May 2021	2	0	0
Jun 2021	3	2	0
Aug 2021	1	1	0
Sep 2021	3	1	1
Oct 2021	11	2	0
Nov 2021	42	0	0
Dec 2021	32	0	0
Jan 2022	31	3	0
Feb 2022	13	0	0
Mar 2022	125	4	1
Apr 2022	20	2	0
May 2022	39	0	0
Jun 2022	41	4	1
Jul 2022	19	1	1
Aug 2022	43	1	0
Sep 2022	45	0	0
Oct 2022	60	2	0
Nov 2022	23	0	0
Dec 2022	19	1	2
Jan 2023	41	1	0
Feb 2023	75	1	0
Mar 2023	2	0	0
Apr 2023	5	0	0
May 2023	18	0	0
Jun 2023	4	0	0
Jul 2023	11	5	0
Aug 2023	4	0	0
Sep 2023	9	1	1
Oct 2023	14	0	0
Nov 2023	9	0	0
Dec 2023	9	2	1
Jan 2024	4	1	2
Feb 2024	6	0	0
Mar 2024	3	1	1
Total	2199	415	274

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