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Survival in Danish patients with breast cancer and inflammatory bowel disease: A nationwide cohort study

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Survival in Danish patients with breast cancer and inflammatory bowel disease: A nationwide cohort study. / Søgaard, Kirstine Kobberøe; Cronin-Fenton, Deirdre P; Pedersen, Lars; Sørensen, Henrik T; Lash, Timothy L.

I: Inflammatory Bowel Diseases, 2008.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

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@article{de2419c0d4b111dcabe4000ea68e967b,
title = "Survival in Danish patients with breast cancer and inflammatory bowel disease: A nationwide cohort study",
abstract = "Background: Incidences of inflammatory bowel disease (IBD) and of breast cancer have increased over the last decades. The influence of IBD on breast cancer prognosis, however, is unknown. We therefore examined the impact of IBD on treatment receipt and survival in breast cancer patients.Methods: Information on breast cancer patients (stage and treatment) diagnosed between 1980 and 2004 was sourced from the Danish Cancer Registry. Data on IBD and potential confounders were extracted from the Danish National Registry of Patients covering all Danish hospitals. Cox regression was used to compute mortality rate ratios (MRRs) among breast cancer patients with IBD, compared to their non-IBD counterparts, adjusting for age, stage, comorbidity measured by the Charlson Index, and calendar year.Results: We identified 71,148 breast cancer cases; 67 also had Crohn's disease (CD) and 216 had ulcerative colitis (UC). Patients with CD had more advanced stage and received radiotherapy less, and chemotherapy more, frequently than patients without IBD. In the adjusted analyses there was no substantial survival difference in breast cancer patients with and without IBD (MRR(CD) = 1.22; 95% confidence interval [CI] = 0.85-1.75; MRR(UC) = 1.09; 95% CI = 0.86-1.38). In a stratified analysis, chemotherapy was associated with poorer survival in patients with CD (MRR(CD) = 1.93; 95% CI = 1.00-3.72).Conclusions: Breast cancer patients with UC receive the same treatment and have similar survival to breast cancer without IBD. In contrast, breast cancer patients with CD are treated with radiotherapy less often. Survival of breast cancer in patients with CD treated with chemotherapy is poorer compared to survival in patients without IBD.(Inflamm Bowel Dis 2007). Udgivelsesdato: 2007-Dec-10",
author = "S{\o}gaard, {Kirstine Kobber{\o}e} and Cronin-Fenton, {Deirdre P} and Lars Pedersen and S{\o}rensen, {Henrik T} and Lash, {Timothy L}",
year = "2008",
doi = "10.1002/ibd.20341",
language = "English",
journal = "Inflammatory Bowel Diseases",
issn = "1078-0998",
publisher = "LIPPINCOTT WILLIAMS & WILKINS",

}

RIS

TY - JOUR

T1 - Survival in Danish patients with breast cancer and inflammatory bowel disease: A nationwide cohort study

AU - Søgaard, Kirstine Kobberøe

AU - Cronin-Fenton, Deirdre P

AU - Pedersen, Lars

AU - Sørensen, Henrik T

AU - Lash, Timothy L

PY - 2008

Y1 - 2008

N2 - Background: Incidences of inflammatory bowel disease (IBD) and of breast cancer have increased over the last decades. The influence of IBD on breast cancer prognosis, however, is unknown. We therefore examined the impact of IBD on treatment receipt and survival in breast cancer patients.Methods: Information on breast cancer patients (stage and treatment) diagnosed between 1980 and 2004 was sourced from the Danish Cancer Registry. Data on IBD and potential confounders were extracted from the Danish National Registry of Patients covering all Danish hospitals. Cox regression was used to compute mortality rate ratios (MRRs) among breast cancer patients with IBD, compared to their non-IBD counterparts, adjusting for age, stage, comorbidity measured by the Charlson Index, and calendar year.Results: We identified 71,148 breast cancer cases; 67 also had Crohn's disease (CD) and 216 had ulcerative colitis (UC). Patients with CD had more advanced stage and received radiotherapy less, and chemotherapy more, frequently than patients without IBD. In the adjusted analyses there was no substantial survival difference in breast cancer patients with and without IBD (MRR(CD) = 1.22; 95% confidence interval [CI] = 0.85-1.75; MRR(UC) = 1.09; 95% CI = 0.86-1.38). In a stratified analysis, chemotherapy was associated with poorer survival in patients with CD (MRR(CD) = 1.93; 95% CI = 1.00-3.72).Conclusions: Breast cancer patients with UC receive the same treatment and have similar survival to breast cancer without IBD. In contrast, breast cancer patients with CD are treated with radiotherapy less often. Survival of breast cancer in patients with CD treated with chemotherapy is poorer compared to survival in patients without IBD.(Inflamm Bowel Dis 2007). Udgivelsesdato: 2007-Dec-10

AB - Background: Incidences of inflammatory bowel disease (IBD) and of breast cancer have increased over the last decades. The influence of IBD on breast cancer prognosis, however, is unknown. We therefore examined the impact of IBD on treatment receipt and survival in breast cancer patients.Methods: Information on breast cancer patients (stage and treatment) diagnosed between 1980 and 2004 was sourced from the Danish Cancer Registry. Data on IBD and potential confounders were extracted from the Danish National Registry of Patients covering all Danish hospitals. Cox regression was used to compute mortality rate ratios (MRRs) among breast cancer patients with IBD, compared to their non-IBD counterparts, adjusting for age, stage, comorbidity measured by the Charlson Index, and calendar year.Results: We identified 71,148 breast cancer cases; 67 also had Crohn's disease (CD) and 216 had ulcerative colitis (UC). Patients with CD had more advanced stage and received radiotherapy less, and chemotherapy more, frequently than patients without IBD. In the adjusted analyses there was no substantial survival difference in breast cancer patients with and without IBD (MRR(CD) = 1.22; 95% confidence interval [CI] = 0.85-1.75; MRR(UC) = 1.09; 95% CI = 0.86-1.38). In a stratified analysis, chemotherapy was associated with poorer survival in patients with CD (MRR(CD) = 1.93; 95% CI = 1.00-3.72).Conclusions: Breast cancer patients with UC receive the same treatment and have similar survival to breast cancer without IBD. In contrast, breast cancer patients with CD are treated with radiotherapy less often. Survival of breast cancer in patients with CD treated with chemotherapy is poorer compared to survival in patients without IBD.(Inflamm Bowel Dis 2007). Udgivelsesdato: 2007-Dec-10

U2 - 10.1002/ibd.20341

DO - 10.1002/ibd.20341

M3 - Journal article

C2 - 18069672

JO - Inflammatory Bowel Diseases

JF - Inflammatory Bowel Diseases

SN - 1078-0998

ER -