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CompletedNCT00461175EURAS-IUDUpdated Jul 17, 2015Results posted

European Active Surveillance Study for Intrauterine Devices

An observational study in Uterine Perforation, sponsored by Center for Epidemiology and Health Research, Germany. Completed at 1 site in Germany. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-07-17.

Sponsored by Center for Epidemiology and Health Research, Germany · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
63,194
Ages
18 Years and older
Sex
Female
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Study summary

The primary objective of the study is to assess the risks of intrauterine device (IUD) use in a study population that is representative for the actual users of the individual IUDs. The primary clinical outcome of interest is the uterine perforation rate.

Read the detailed description

This is a large, multinational, prospective, controlled, long-term cohort study that follows a series of cohorts. The cohorts consist of new users of different groups of intrauterine devices (IUDs). Primarily, a non-interference approach - with exception of the standardized diagnostic workup to identify uterine perforations - will be used to provide standardized, comprehensive and reliable information on these IUDs under routine medical conditions.

The primary objective of the study is to assess the risks of intrauterine device (IUD) use in a study population that is representative for the actual users of the individual IUDs. The primary clinical outcome of interest is the uterine perforation rate. Secondary objectives are among others:

  • the time intervals between IUD insertion and uterine perforation
  • impact of post-partal IUD insertion on the uterine perforation rate
  • proportion of uterine perforations associated with IUD insertion with serious clinical complications
  • the incidences of medically relevant adverse events associated with IUP use

The combined cohort will include 60000 women recruited in six European countries. Enrollment should begin in November 2006 and end in 2012. Patients should undergo follow-up for at least 1 year.

Recruitment of the cohort members will be conducted via a network of approximately 2000 gynecologists.

Enrollment procedures should not interfere with the prescribing behavior of physicians or with the individual needs of the participating women. Influence on the preference for specific oral contraceptives is to be avoided but significant efforts are to be undertaken to ensure standardized, comprehensive and reliable documentation of all baseline characteristics and adverse events during the follow-up period.

The study participants are women aged 18 or older who have a new insertion of an IUD and who are willing to participate in this cohort study. There are no specific medical inclusion or exclusion criteria. However, women who are not cooperative may be excluded from study participation. Also women with a language barrier will not be eligible for study inclusion.

This study will maintain scientific independence and will be governed by an independent Advisory Council. The Center for Epidemiology and Health Research in Berlin, Germany and its research team will be accountable for the Advisory Council (AC) in all scientific matters. The members of the AC wil be international experts in relevant scientific fields (e. g. epidemiology, gynecology and cardiology).

The study started after all relevant legal and ethical requirements had been fulfilled. Information on the identity of the patients and treating physicians will be kept separated from the clinical information throughout the study. All relevant national data protection laws will be followed.

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Conditions studied

  • Uterine Perforation

Keywords

  • Uterine Perforation
03

In context

Lead sponsor

Center for Epidemiology and Health Research, Germany is the lead sponsor of 24 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Recruitment of cohort members will be conducted via a network of approximately 2000 gynecologists.

Inclusion criteria

  • women who have a new insertion of an IUD
  • women who are willing to participate in this cohort study

Exclusion criteria

Exclusion Criteria:

  • women who are not cooperative
  • women with a language barrier
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
63,194 participants (actual)

Groups and cohorts

  • 1

    Mirena®

  • 2

    Copper IUD

06

What researchers measure

Primary outcomes

  1. Uterine Perforation Rate

    Uterine perforation is a potentially serious complication of intrauterine device (IUD) use. The absolute risk of uterine perforation associated with the LNG IUS in routine medical practice has not hitherto been well defined. It is also unknown whether the perforation rate is higher with this IUD than with copper IUDs.

    Time frame: 12 months after insertion

Other outcomes

  1. Contraceptive Failure

    Intrauterine contraceptive methods have low Pearl Indices. Nevertheless, there is a lack of comparative data between LNG IUS users and copper IUD users. Women with unintended pregnancies were explicitly aked whether the pregnancy occured despite IUD use. The 29 pregnancies that occured after unrecognized IUD expulsion were considered to have resulted from a failure of the contraceptive method and were therefore included in the analysis.

    Time frame: Within 12 months

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Results

Posted Oct 22, 2014
Limitations and caveats
In observational studies like EURAS-IUD, the possibility of bias and residual confounding can never be entirely eliminated. Thus, for risk estimates smaller than 2-fold, causality cannot be inferred confidently in view of alternative explanations.

Participant flow

Overall, 63,194 patients were recruited for the EURAS-IUD study, and 1,746 patients were excluded due to protocol violations. Of these, information on the IUD inserted at baseline is missing for 859 women. Therefore, 859 recruited patients could not be assigned to one of the cohorts and are not counted in the table displaying the participant flow.

Participant flow — Overall Study
MilestoneLNG IUSCopper IUD
Started4360018735
Completed4307818370
Not completed522365
Withdrew: Protocol violation522365

Outcome measures

PrimaryUterine Perforation Rate

Uterine perforation is a potentially serious complication of intrauterine device (IUD) use. The absolute risk of uterine perforation associated with the LNG IUS in routine medical practice has not hitherto been well defined. It is also unknown whether the perforation rate is higher with this IUD than with copper IUDs.

Time frame:
12 months after insertion
Reported as:
Number · participants
Uterine Perforation Rate
participantsLNG IUSCopper IUD
Uterine Perforation Rate6120
Statistical analysis
  • LNG IUS vs Copper IUD · Hazard ratio (hr): 1.61 · 95% CI 0.96 to 2.70Hazard ratio was adjusted for the following prognostic factors: age, BMI, breastfeeding at time of insertion and parity status.
  • LNG IUS vs Copper IUD · Hazard ratio (hr): 1.65 · 95% CI 0.99 to 2.78Hazard ratio was adjusted for the following prognostic factors: age, BMI, time since last delivery, experience of the inserting health care provider.
Other pre-specifiedContraceptive Failure

Intrauterine contraceptive methods have low Pearl Indices. Nevertheless, there is a lack of comparative data between LNG IUS users and copper IUD users. Women with unintended pregnancies were explicitly aked whether the pregnancy occured despite IUD use. The 29 pregnancies that occured after unrecognized IUD expulsion were considered to have resulted from a failure of the contraceptive method and were therefore included in the analysis.

Time frame:
Within 12 months
Reported as:
Number · participants
Contraceptive Failure
participantsLNG IUSCopper IUD
Contraceptive Failure2692
Statistical analysis
  • LNG IUS · Pearl index: 0.06 · 95% CI 0.04 to 0.09
  • Copper IUD · Pearl index: 0.52 · 95% CI 0.42 to 0.64
  • LNG IUS vs Copper IUD · Hazard ratio (hr): 0.16 · 95% CI 0.10 to 0.25Hazard ratio was adjusted for the following prognostic factors: age, BMI, and parity.

Adverse events

Collected over Information on adverse events was collected over a time period of 12 months.. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
LNG IUS—21/43,078 (0%)0/43,078 (0%)
Copper IUD—7/18,370 (0%)0/18,370 (0%)
Most frequent serious events
Most frequent serious events
EventLNG IUSCopper IUD
Venous thromboembolic eventCardiac disorders9/430785/18370
Cerebrovascular EventsCardiac disorders9/430781/18370
Myocardial infarctionCardiac disorders2/430781/18370
Other arterial thromboembolic eventCardiac disorders1/430780/18370

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)LNG IUSCopper IUDTotal
<=18 years000
Between 18 and 65 years430691837061439
>=65 years909
Age, Continuous
Age, Continuous(years)LNG IUSCopper IUDTotal
Mean37.37 ± 7.5433.33 ± 7.6436.2 ± 7.8
Sex: Female, Male
Sex: Female, Male(Participants)LNG IUSCopper IUDTotal
Female430781837061448
Male000
Region of Enrollment
Region of Enrollment(participants)LNG IUSCopper IUDTotal
Germany16981602323004
Austria630319478250
Finland22805852865
United Kingdom14190678420974
Sweden269320184711
Poland63110131644
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Study locations

1 site
  • Center for Epidemiology and Health Research
    Berlin, 10115, Germany
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References and documents

Publications

  • Heinemann K, Reed S, Moehner S, Minh TD. Risk of uterine perforation with levonorgestrel-releasing and copper intrauterine devices in the European Active Surveillance Study on Intrauterine Devices. Contraception. 2015 Apr;91(4):274-9. doi: 10.1016/j.contraception.2015.01.007. Epub 2015 Jan 16. PubMed 25601352 ↗
  • Heinemann K, Reed S, Moehner S, Minh TD. Comparative contraceptive effectiveness of levonorgestrel-releasing and copper intrauterine devices: the European Active Surveillance Study for Intrauterine Devices. Contraception. 2015 Apr;91(4):280-3. doi: 10.1016/j.contraception.2015.01.011. Epub 2015 Jan 16. PubMed 25601350 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 17, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00461175
Lead sponsor
Center for Epidemiology and Health Research, Germany
Collaborators
Bayer
Responsible party
Klaas Heinemann, MD, PhD (Principal Investigator, Center for Epidemiology and Health Research, Germany) — Principal investigator
First posted
Apr 17, 2007
Start date
Nov 2006
Primary completion
May 2012
Completion
Dec 2013
Results posted
Oct 22, 2014
Last update
Jul 17, 2015

Study contacts

Klaas Heinemann, MD, PhD
principal investigator · Center for Epidemiology and Health Research, Germany

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jun 2015. You cannot join it, but the record below documents what was studied.

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