Impact of antibiotic exposure on the risk of colorectal cancer

Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. Methods We conducted a ne...

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Published inPharmacoepidemiology and drug safety Vol. 24; no. 5; pp. 534 - 542
Main Authors Boursi, Ben, Haynes, Kevin, Mamtani, Ronac, Yang, Yu-Xiao
Format Journal Article
LanguageEnglish
Published England Blackwell Publishing Ltd 01.05.2015
Wiley Subscription Services, Inc
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Online AccessGet full text
ISSN1053-8569
1099-1557
1099-1557
DOI10.1002/pds.3765

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Abstract Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. Methods We conducted a nested case–control study using a large population‐based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow‐up before index date were selected using incidence‐density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis. Results A total of 20 990 cases and 82 054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10 years prior to index date was 1.11 (95%CI 1.02–1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11–1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per‐year (exposure intensity) with an OR of 1.04 (95%CI 1.01–1.08) per one additional treatment per year. Exposure to anti‐viral or anti‐fungal therapy was not associated with CRC risk. Conclusions Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk. Copyright © 2015 John Wiley & Sons, Ltd.
AbstractList Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. We conducted a nested case-control study using a large population-based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow-up before index date were selected using incidence-density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis. A total of 20,990 cases and 82,054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10 years prior to index date was 1.11 (95%CI 1.02-1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11-1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per-year (exposure intensity) with an OR of 1.04 (95%CI 1.01-1.08) per one additional treatment per year. Exposure to anti-viral or anti-fungal therapy was not associated with CRC risk. Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk.
Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk.PURPOSEGut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk.We conducted a nested case-control study using a large population-based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow-up before index date were selected using incidence-density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis.METHODSWe conducted a nested case-control study using a large population-based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow-up before index date were selected using incidence-density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis.A total of 20,990 cases and 82,054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10 years prior to index date was 1.11 (95%CI 1.02-1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11-1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per-year (exposure intensity) with an OR of 1.04 (95%CI 1.01-1.08) per one additional treatment per year. Exposure to anti-viral or anti-fungal therapy was not associated with CRC risk.RESULTSA total of 20,990 cases and 82,054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10 years prior to index date was 1.11 (95%CI 1.02-1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11-1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per-year (exposure intensity) with an OR of 1.04 (95%CI 1.01-1.08) per one additional treatment per year. Exposure to anti-viral or anti-fungal therapy was not associated with CRC risk.Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk.CONCLUSIONSPast exposure to multiple courses of penicillins is related to a modest elevation in CRC risk.
Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. Methods We conducted a nested case–control study using a large population‐based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow‐up before index date were selected using incidence‐density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis. Results A total of 20 990 cases and 82 054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10 years prior to index date was 1.11 (95%CI 1.02–1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11–1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per‐year (exposure intensity) with an OR of 1.04 (95%CI 1.01–1.08) per one additional treatment per year. Exposure to anti‐viral or anti‐fungal therapy was not associated with CRC risk. Conclusions Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk. Copyright © 2015 John Wiley & Sons, Ltd.
Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. Methods We conducted a nested case-control study using a large population-based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow-up before index date were selected using incidence-density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis. Results A total of 20990 cases and 82054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10years prior to index date was 1.11 (95%CI 1.02-1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11-1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per-year (exposure intensity) with an OR of 1.04 (95%CI 1.01-1.08) per one additional treatment per year. Exposure to anti-viral or anti-fungal therapy was not associated with CRC risk. Conclusions Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk. Copyright © 2015 John Wiley & Sons, Ltd.
Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim was to evaluate the association between the type and cumulative duration of antibiotic exposure and CRC risk. Methods We conducted a nested case-control study using a large population-based database from the UK. Cases were defined as those with any medical code of CRC. Subjects with known familial CRC syndromes or IBD were excluded from the study. For every case, four eligible controls matched on age, sex, practice site, and duration of follow-up before index date were selected using incidence-density sampling. Exposure of interest was antibiotic therapy before index date. Adjusted ORs and 95%CIs were estimated using conditional logistic regression analysis. Results A total of 20990 cases and 82054 controls were identified. The adjusted OR for CRC among subjects first exposed to penicillins >10years prior to index date was 1.11 (95%CI 1.02-1.20). The risk increased significantly with the number of penicillin exposures up to 1.20 (95%CI 1.11-1.31) for >10 courses. The risk also increased with the average number of penicillin treatments per-year (exposure intensity) with an OR of 1.04 (95%CI 1.01-1.08) per one additional treatment per year. Exposure to anti-viral or anti-fungal therapy was not associated with CRC risk. Conclusions Past exposure to multiple courses of penicillins is related to a modest elevation in CRC risk. Copyright copyright 2015 John Wiley & Sons, Ltd.
Author Boursi, Ben
Haynes, Kevin
Mamtani, Ronac
Yang, Yu-Xiao
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Issue 5
Keywords antibiotic
penicillin
cancer
colorectal
risk factor
pharmacoepidemiology
Language English
License Copyright © 2015 John Wiley & Sons, Ltd.
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SSID ssj0009994
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Snippet Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue....
Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue. Our aim...
Purpose Gut microbiota has been postulated to serve as a significant promoter of CRC formation, and colonic dysbiosis was previously reported in CRC tissue....
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StartPage 534
SubjectTerms Aged
Aged, 80 and over
Anti-Bacterial Agents - administration & dosage
Anti-Bacterial Agents - adverse effects
Anti-Bacterial Agents - therapeutic use
antibiotic
Antibiotics
cancer
Case-Control Studies
colorectal
Colorectal cancer
Colorectal Neoplasms - chemically induced
Colorectal Neoplasms - epidemiology
Colorectal Neoplasms - microbiology
Databases, Factual
Dose-Response Relationship, Drug
Electronic Health Records
Female
Humans
Incidence
Male
Microbiota - drug effects
Middle Aged
Multivariate Analysis
penicillin
pharmacoepidemiology
risk factor
Risk Factors
United Kingdom
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Title Impact of antibiotic exposure on the risk of colorectal cancer
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