NCT04588402

Impact of HPV Vaccination on Prevention of Cervical HPV Infection in Sikkim, India

Assessing the Population Level Impact of HPV Vaccination on Prevention of Cervical HPV Infection in Sikkim, India

• Status: Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 5,500 (estimated)
• Sponsor: International Agency for Research on Cancer · Academic / Other
• Sex: Female
• Age: 18 Years – 22 Years
• Healthy volunteers: Accepted

Summary

This project aims is to monitor the effectiveness of HPV vaccination in real-word conditions, at least 7 years after initiation of HPV vaccination in Sikkim. This study would give an opportunity to provide rapid feedback to the Indian public health authorities about the impact of the HPV vaccine.

Detailed description

The investigators would like to estimate the prevalence of HPV infections based on cervical samples collected from the Sikkimese women aged 18 to 22 years at baseline (i.e. when the study participants are expected to have no benefit of vaccination) and seven years after the launch of the HPV vaccination programme, by which time the initial vaccinated cohorts will be aged 18 to 22 years and many of them will be sexually active. If the vaccination programme continues with the current high coverage rate, the cohort of women in the second age group are expected to be protected due to herd immunity, irrespective of whether any individual woman receives the vaccine or not. Overall effectiveness to protect women aged 18-22 years against targeted and non-targeted HPV infections will be monitored through repeated cervical sample -based surveys.

Conditions

• Cervical Cancer

Interventions

Type	Name	Description
BIOLOGICAL	The study being observational in nature, there is no intervention. The investigators will only collect cervical samples from married women within a specified age range at different intervals.	Women will be approached one time only, when they will attend the gynecology out-patients department for various reasons. After signing the informed consent, the participants will fill in a risk factor questionnaire to study the socio-demographic information, sexual history and HPV vaccination history and the determinent of HPV infection. The questionnaire will be administered by a trained social worker or nurse. A gynecologist will collect cervical cells from the participant's cervix during a gynecological examination. The cervical specimen will be examined for presence of specific HPV genotypes and Chlamydia infection.

Timeline

• Start date: 2020-10-01
• Primary completion: 2026-10-30
• Completion: 2026-12-31
• First posted: 2020-10-19
• Last updated: 2026-04-03

Locations

1 site across 1 country: India