Colposcopic Impression in a Birth Cohort Previously Eligible for HPV-vaccination

June 2, 2021 updated by: Hanna Sahlgren, Falu Hospital
Women were invited to attend colposcopy within two-four months after a positive screening test (two consecutive screening tests indicating low-grade squamous intraepithelial lesions (LSIL) and HPV positivity or a single screening test indicating high grade squamous intraepithelial lesions (HSIL)), according to national guidelines

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

To describe the source population, the overall number of invitations and tests taken in the region during the study period were retrieved from the Swedish National Cervical Screening Registry (NKCx), which has an almost 100% coverage of screening history in Sweden since 1993.

Women were invited to attend colposcopy within two-four months after a positive screening test (two consecutive screening tests indicating low-grade squamous intraepithelial lesions (LSIL) and HPV positivity or a single screening test indicating high grade squamous intraepithelial lesions (HSIL)), according to national guidelines. All colposcopies were performed in 2018 and 2019 at the Department of Obstetrics and Gynecology, Falun Hospital, by a specialist in Obstetrics and Gynecology. Digital imaging ensured the possibility of subsequent re-review by an expert colposcopist at the Karolinska University Hospital. The colposcopies consisted of a microscopic evaluation of the uterine cervix including punch biopsies as well as endocervical sampling with liquid based cytology (LBC). In the absence of visible colposcopic lesions, random biopsies at 6 and 12 o´clock were taken to ensure histopathological confirmation in all women. Women with colposcopic and/or histopathologic findings that required treatment underwent excision (conization) according to national guidelines. The consultation also included questions on medical history according to a protocol designed for the study.

Analysis of histopathology and cytology was performed at the Department of Pathology, Falun Hospital. An LBC sample was analyzed for the presence of 14 high risk HPV (hrHPV) genotypes and cytology. HPV samples were tested at the Department of Laboratory Medicine, Falun Hospital, using amplification of target DNA by the Polymerase Chain Reaction (PCR) and nucleic acid hybridization (Cobas 4800, Roche Molecular Systems). LBC samples positive for high risk types other than HPV 16/18, were sent for further genotyping to the Center for Cervical Cancer Prevention at the Karolinska University Laboratory Huddinge.

Information on vaccination status was retrieved through linkage to the National HPV Vaccination Register (SVEVAC), an informed consent-based register in operation since the introduction of HPV vaccination In Sweden, and data was further complemented by linkage to the Prescribed Drug Register (PDR), a mandatory register on dispensed prescriptions in Sweden in operation since July 2005. All women were asked about their vaccination status after the colposcopic examination had been performed, and linkage to SVEVAC and PDR was run after all study colposcopies and laboratory analysis had been completed. Hence, vaccination status was blinded to the colposcopists, pathologists, and laboratory staff.

Study Type

Observational

Enrollment (Actual)

160

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Sweden
    • Dalarna
      • Falun, Dalarna, Sweden, 79172
        • Falu Lasarett

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

22 years to 26 years (ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Sampling Method

Probability Sample

Study Population

Women were invited to attend colposcopy within two-four months after a positive screening test (two consecutive screening tests indicating low-grade squamous intraepithelial lesions (LSIL) and HPV positivity or a single screening test indicating high grade squamous intraepithelial lesions (HSIL)), according to national guidelines

Description

Inclusion Criteria:

- HPV-vaccinated women Women taking their first test within the organized cervical screening program at age 23 Women residing in one Swedish county

Exclusion Criteria:

Women who were hysterectomized, Women who died Women who moved

-

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Vaccinated women with positive screening test
All women in one Swedish county taking their first screening test within the organized cervical screening program
Biological: The performance of colposcopy in vaccinated women
Evaluating the performance of colpscopy in HPV vaccinated women by comparing vaccinated and unvaccinated women taking their first test within the organized screening program

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Performance of the Swedscore colposcopy scale in HPV-vaccinated women
Time Frame: 1 year
Positive predictive value of colposcopy for high grade lesions in HPV-vaccinated women
1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Falu Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ACTUAL)

March 14, 2018

Primary Completion (ACTUAL)

October 15, 2019

Study Completion (ACTUAL)

December 31, 2019

Study Registration Dates

First Submitted

May 27, 2021

First Submitted That Met QC Criteria

May 30, 2021

First Posted (ACTUAL)

June 2, 2021

Study Record Updates

Last Update Posted (ACTUAL)

June 7, 2021

Last Update Submitted That Met QC Criteria

June 2, 2021

Last Verified

June 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2018/535-31/1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

On demand

IPD Sharing Time Frame

3 years

IPD Sharing Access Criteria

Contact Principal investigator

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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