Evidence map›Paper›PMID 26919969›Full record

ArticleGastroenterology2016

Association Between Long-term Oral Contraceptive Use and Risk of Crohn's Disease Complications in a Nationwide Study.

Hamed Khalili, Fredrik Granath, Karin E Smedby, Anders Ekbom, Martin Neovius, Andrew T Chan, Ola Olen

Open access · greenAbstract read
In one paragraph

Article in Gastroenterology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 4 pooled it
6.4field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 4 syntheses or guidelines pooled it, 76 citations in OpenAlex.

  1. Pooled it
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  12. Sex hormone deprivation abolishes sex-specific differences in murine colon inflammation and related lipid mediator production.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2024
    Article
  13. Article
  14. Article
  15. Drug Repurposing in Crohn's Disease Using Danish Real-World Data.Pragmatic and observational research · 2024
    Article
  16. Sex- and gender-related differences in inflammatory bowel diseases.Frontiers in gastroenterology (Lausanne, Switzerland) · 2023
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 2 countries.

Hamed KhaliliDivision of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. Electronic address: hkhalili@mgh.harvard.edu.
Fredrik GranathClinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.
Karin E SmedbyClinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.
Anders EkbomClinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.
Martin NeoviusClinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.
Andrew T ChanDivision of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
Ola OlenClinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Sweden.
Karolinska Institutet · SEBrigham and Women's Hospital · USHarvard University · US

Funding

Pilot & Feasibility ProgramP30DK043351 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI ANDREW D LUSTER · 1991 to 2026
$35.3M
Oral Contraceptives in the Etiopathogenesis of Crohn's DiseaseK23DK099681 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI KHALILI, HAMED · 2013 to 2017
$946k
Mentored Patient-Oriented Research in Digestive DiseasesK24DK098311 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI CHAN, ANDREW T · 2013 to 2017
$930k
NIDDK NIH HHS K23 DK099681NIDDK NIH HHS K24 DK098311NIDDK NIH HHS P30 DK043351
6 · The paper itself

Abstract

BACKGROUND &

aimsUse of exogenous hormones, in the form of oral contraceptives (OCs), has been linked consistently to risk of Crohn's disease (CD). Nonetheless, it is not clear how OCs might contribute to the progression of CD.

methodsWe conducted a prospective study of female patients with CD (age, 16-51 y), identified from the inpatient and outpatient care components of the Swedish National Patient Register from January 2002 through December 2013. Information on current OC use was obtained from the Prescribed Drug Register starting in July of 2005 and updated until December of 2013. Primary outcomes were defined as first CD-related surgery and first steroid prescription. We used Cox proportional hazard modeling with time-varying covariates to estimate multivariable-adjusted hazard ratios (MV-adjusted HRs).

resultsWe identified 482 incident cases of surgery among 4036 patients with CD, with a median follow-up period of 58 months. Compared with nonusers, the MV-adjusted HRs for surgery were 1.14 (95% confidence interval [CI], 0.80-1.63) for past users and 1.30 (95% CI, 0.89-1.92) for current users. The risk of surgery increased with longer duration of use (Ptrend = .036) and higher prescribed daily dose (Ptrend = .016). Specifically, for women with more than 3 years of OC use, the MV-adjusted HR for surgery was 1.68 (95% CI, 1.06-2.67). The association was confined to the combination type of OC. We estimated that for every 83 patients with CD receiving the combination type of oral contraceptives for at least 1 year, 1 extra surgery is required. The rate of steroid prescriptions did not appear to increase with past or current use of OCs, compared with patients who have not taken OCs (all Pcomparisons > .20).

conclusionsIn a nationwide analysis of patients in Sweden, long-term use of OCs, particularly the combination type, was associated with an increased risk of surgery among women with established CD. Clinicians carefully should evaluate and monitor contraceptive options among women with established CD.

Indexed as

AdolescentAdultCase-Control StudiesContraceptives, OralCrohn DiseaseDigestive System Surgical ProceduresFemaleHumansMiddle AgedProportional Hazards ModelsProspective StudiesRisk FactorsSwedenTime FactorsYoung AdultContraceptives, OralBirth ControlCrohn’s DiseaseSurgerySwedish National Patient Register

Identifiers

PMID26919969
PMCPMC4928680
OpenAlexW2278424170

What OpenQuestion holds

Textmetadata
LicenceTDM
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.