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Objective: The aim of this study was to compare the diagnostic accuracy of the Pap test, liquid-based cytology (LBC), and human papillomavirus (HPV) testing used as screening methods for the early detection of cervical cancer in Korea.
Materials and Methods: Articles reporting the sensitivity and specificity of each screening method that were published between 1995 and March 2008 were retrieved from MEDLINE and KoreaMed. A meta-analysis was conducted to calculate pooled estimates for the sensitivity and specificity of each method. Only cases with histological confirmation were included, and cervical cancer was defined as samples exhibiting cervical intraepithelial neoplasia 2 or worse. In cytological tests, findings of atypical squamous cells of undetermined significance or worse were considered positive.
Results
Of the 24 studies, 15 studies of the Pap test, 3 studies of LBC, and 4 studies of HPV met the inclusion criteria and were included in the meta-analysis. The meta-analysis showed that the sensitivity was highest for LBC (92%), followed by HPV testing (83%) and the Pap test (76%), and the specificity of LBC was the highest (79%), followed by the Pap test (76%) and HPV testing (59%). However, except for the sensitivity of LBC (heterogeneity p-value = 0.682), significant heterogeneity was found among the results of the studies (heterogeneity p-value < 0.0001).
Discussion
Due to the significant heterogeneity among the studies, the results of this meta-analysis are limited in representing the accuracy of each test method. The accuracy and cost-effectiveness of cervical cancer screening methods should be further evaluated.