Cervical And Self-Sample In Screening Study (CASSIS)

Cervical And Self-Sample In Screening (CASSIS) Study: Diagnostic Performance of Molecular HPV Testing With the Eve Medical Self-collection System© for Detecting Cervical Intraepithelial Neoplasia

The proposed study seeks to compare the diagnostic performance of Human Papillomavirus (HPV) testing in self-collected samples via the Eve Medical self-collection system© (Eve) with standard physician-collected samples for the detection of cervical intraepithelial neoplasia grade 1 or worse (CIN1+) and cervical cancer among women referred for colposcopy. The performance of the Eve sample will also be compared with that of a second self-sample via a cobas® PCR Female swab.

Approximately 1000 adult women with an abnormal Pap test at the level of an atypical squamous cells of undetermined significance or worse squamous or glandular abnormality (i.e., ASCUS+) or an abnormal co-test (ASCUS+ and HPV-positive) result will be recruited over a period of 12 months via colposcopy clinics located at the Jewish General Hospital, St-Mary's Hospital, and the McGill University Health Centers (Royal Victoria Hospital).

Participating women will undergo three cervical or cervicovaginal sampling techniques: 1) self-sampling using the Eve Medical self-collection system©; 2) self-sampling using a cobas® PCR Female swab; and 3) physician-collected sampling. The participants will also fill in a questionnaire on their experience with the convenience and acceptability of the Eve system, relative to the other two sampling approaches. The decision as to which self-sample is to be collected first will be dependent on randomization

HPV testing will be done using the cobas® 4800 HPV Test. The liquid medium of within the cobas® PCR CELL Collection Media with the provider collected sample and the cobas® PCR media with the two self-collected samples will be used to suspend the cellular material prior to HPV testing. We have made collaborative arrangements with Dr. Marcel Behr, Chief of the Department of Clinical Microbiology at the McGill University Health Centre for the HPV genotyping work.

Histology-confirmed CIN1+ will form the study outcome or case definition. Sensitivity, specificity, and predictive values (along with their respective 95% confidence intervals) will be calculated for each sample type to evaluate the clinical performance of the various sampling techniques. We will use CIN1+ as definition of disease but analyses will also be performed for more stringent definitions, e.g. CIN2+ or CIN3/cancer.

Study Overview

• Status: Completed
• Conditions: Cervical Cancer; Intraepithelial Neoplasia
• Intervention / Treatment: Device: Eve Medical self-collection system©; Device: cobas® PCR Female swab self-sampling; Procedure: Physician-collected sampling

Detailed Description

After the discovery that Human Papillomavirus (HPV) infection is the necessary cause of cervical cancer there have been much interest in the introduction of novel screening strategies involving HPV DNA testing [1]. HPV DNA testing was shown to have higher sensitivity in detecting cervical cancer and its precursors and greater reproducibility than Papanicolaou (Pap) cytology screening and has been therefore proposed as the primary screening method for the future. In high-income countries, cases of cervical cancer continue to develop among unscreened and under-screened women [2]. Factors discouraging women from attending routine screening include fear of pain or discomfort, lack of time or perceived inconvenience, cultural or religious concerns, and poor socioeconomic status [3]. For a screening program to be effective high coverage is essential and thus attendance is a critical requirement.

Because of the high sensitivity of molecular HPV testing to detect cervical cancer precursors there is great potential for screening coverage to be increased by inviting non-attendant to provide self-collected vaginal samples. Providing these women with a simple, convenient, and inexpensive means of self-testing may improve cervical screening participation [3]. Self-sampling is also an attractive approach to assist screening in poor countries, which typically do not have structured cervical cancer screening programs while having to bear the greatest burden of cervical cancer morbidity and mortality [4]. Self-sampling can also enhance the value of post-HPV vaccination surveillance by allowing a more efficient monitoring of HPV type distribution in populations. Finally, self-sampling represents a good research tool to assist prospective studies of genital HPV infection and natural history of cervical neoplasia.

Specifically for cervical cancer screening, it has been shown that self-collected cervicovaginal specimens from women who received proper instruction for collecting them yield HPV test results that are comparable to those in specimens collected by physicians [5-8]. Women also prefer self-sampling relative to clinician-provided samples, provided that they can be assured that they are told how to properly collect the sample [8, 9]. Although there is conceivably some loss of sensitivity and specificity in screening for cervical cancer in a specimen that is not directly collected from the ecto- and endo-cervix the overall accuracy of the HPV testing results (to identify presence of cervical precancerous lesions) is still superior to that of physician-collected Pap smears. Therefore, replacing a more anatomically-correct specimen (the one collected with direct visualization of the cervix by a primary healthcare provider) with one collected from the vagina (and thus diluted with exfoliated cells from a wider epithelial surface area) is compensated by the high sensitivity of the molecular screening approach [6, 10, 11]. Performance of screening seems also to be unaffected by storage and transport of the self-sample swabs, irrespective of whether they have been kept dry or transferred and resuspended into a liquid transport medium [10, 12].

A critical feature in enhancing women's acceptance and adherence with the self-sampling approach for cervical cancer screening and HPV surveillance studies is the convenience of the device used for collection. Dacron and polyester swabs are simple, common, and inexpensive. However, they are inconvenient and not isolated within a sheath that prevents contact of the sampling area with mucosal surfaces in the labia and vaginal opening. Ideally, sampling devices should be anatomically correct to facilitate insertion and the sampling surface that will retain the exfoliated cells should be protected from contact with the labia and lower vaginal mucosa while the device is inserted, with the objective of sampling cells that are mostly from the cervix and upper vaginal area.

HPV DNA testing using self-collected cervicovaginal specimens represents a promising strategy to increase cervical screening participation and thus reduce rates of cervical cancer in countries with established cervical screening programs. Furthermore, this approach can also greatly improve the coverage and quality of cervical cancer screening in developing countries, as well as in remote regions in developed countries, e.g., aboriginal populations in Northern Quebec and in First Nations territories. Facilitating and improving uptake of cervical cancer screening would save lives, reduce costs of treating invasive cancer and potentially reduce inequalities in avoidable mortality caused from cervical cancer.

(full protocol available upon request)

• Study Type: Interventional
• Enrollment (Actual): 1225
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Canada
  • Quebec
    • Montreal, Quebec, Canada, H2W 1S6
      • McGill University - Division of Cancer Epidemiology

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Female

Description

Inclusion Criteria:

• Women of all ages are eligible to the study if they have been referred to the participating colposcopy clinic because of an abnormal Pap test at the level of an atypical squamous cells of undetermined significance or worse squamous or glandular abnormality (i.e., ASCUS+) or an abnormal co-test (ASCUS+ and HPV-positive) result.

Exclusion Criteria:

• none

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Screening
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Double

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Eve Medical self-collection system©; Device: Self-sampling swab from Eve Medical for collection of vaginal cells.	Device: Eve Medical self-collection system©; The Eve collection system is a plastic device not much bigger than a tampon that is inserted in the vaginal cavity. A silicone brush is then swiped around the vagina to scrape a few vaginal cells for cervical cancer screening.; Other Names: HerSwabTM
Placebo Comparator: cobas® PCR Female swab self-sampling; Device: Regular polyester swab for collection of vaginal cells.	Device: cobas® PCR Female swab self-sampling; Regular polyester swab for collection of vaginal cells.; Other Names: Long swab
Placebo Comparator: Physician-collected sampling; Routine colposcopy sample collected by a physician.	Procedure: Physician-collected sampling; Routine colposcopy sample collected by a physician.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Differences by comparison groups in detection of histologically confirmed Cervical Intraepithelial Neoplasia grade 1 or worse (CIN1+)	Diagnostic accuracy (sensitivity and specificity with 95% confidence intervals, and predictive values will be determined for each sample type to evaluate the clinical performance of the various sampling techniques. The investigators hypothesize that the Eve sample will yield sensitivity and specificity results that are no worse than those with the physician-collected sample, while providing better or equivalent results than those with the self-sample based on the Cobas® PCR Female swab.	Cross-Sectional (1 year-period to accrue patients)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Patient satisfaction and experience using the self-sampling devices	Participants will be asked to fill out a questionnaire consisting of 10 questions on ease of use, comfort, embarrassment, and clarity of instructions when using self-sampled cervicovaginal sampling such as the HerSwabTM and the female polyester swab as compared to the physician-collected sample. The investigators hypothesize similar patient satisfaction with the three sampling approaches.	Cross-Sectional (1 year-period)

Collaborators and Investigators

• Sponsor: McGill University
• Investigators: Principal Investigator: Eduardo Franco, DrPH, McGill University; Study Director: Mariam El-Zein, PhD, McGill University

Study record dates

Study Major Dates

• Study Start: June 1, 2015
• Primary Completion (Actual): April 1, 2016
• Study Completion (Actual): April 1, 2016

Study Registration Dates

• First Submitted: February 24, 2015
• First Submitted That Met QC Criteria: March 18, 2015
• First Posted (Estimate): March 24, 2015

Study Record Updates

• Last Update Posted (Estimate): August 17, 2016
• Last Update Submitted That Met QC Criteria: August 16, 2016
• Last Verified: August 1, 2016

More Information

Terms related to this study

• Keywords: Screening; Human Papillomavirus; Pap test; Self-collection test
• Additional Relevant MeSH Terms: Neoplasms by Histologic Type; Carcinoma; Neoplasms, Glandular and Epithelial; Neoplasms; Carcinoma in Situ
• Other Study ID Numbers: A11-M103-14B