Comparative analysis of different cervical screening methods with special reference to the WHO recommended human papillomavirus detection at a rural tertiary care center - A pilot study

Abstract

Background: Cervical cancer (Ca Cx) the 4th common cancer has a high mortality rate. Human Papilloma Virus (HPV) is chiefly responsible for a long latent period to progress from preinvasive to invasive Ca Cx. So it can be prevented by screening procedures such as visual inspection with acetic acid (VIA), conventional cervical PAP smear (CP), liquid-based cytology (LBC), and high-risk (HPV-hr) detection along with vaccination. Aims and Objectives: The study aims to determine the socio-demographic profile of Ca Cx and the most appropriate cost-effective community screening method. Materials and Methods: A prospective observational study with 80 symptomatic women of reproductive and peri/postmenopausal age groups attending the Gynecology Department who underwent VIA, CP, and LBC and thereby detected positive along with screened negative but clinically suspicious women were tested for HPV-hr detection. Results were tabulated into an Excel sheet and screening methods were compared using Chi-square test, gold standard being cervical histopathology (P<0.5 significant). Statistical software used - Graphpad Prism 9 (San Diego, CA). Results: The mean age was 43.3 years. Multiparity and early marriage were seen in 80% and 45% respectively. Inflammatory lesions were best diagnosed by CP but epithelial cell abnormality and more satisfactory smears by LBC (P<0.05). Sensitivity was highest (93.75%) in VIA, positive predictive value, and specificity in CP (91.66%, 75%). negative predictive value was highest in VIA and HPV-hr DNA (50%). Conclusion: VIA with CP/LBC is an economically viable and effective screening method for Ca Cx in developing countries along with HPV vaccination.

Keywords

• cervical cancer; visual inspection with acetic acid; cervical pap smear; liquid based cytology; human papilloma virus-high risk