Application of P16/Ki-67 dual-staining for the detection of high-grade cervical lesions in the triage of patients with minor abnormal cytology: A meta-analysis.

Background: The p16/Ki-67 dual-staining is increasingly applied to increase diagnostic accuracy in detecting high-grade cervical lesions, including cervical intraepithelial neoplasia Grade 2 (CIN2+) and CIN3+.

Objectives: To compare the diagnostic performance of p16/Ki-67 dual-staining with the human papillomavirus (HPV) tests in the triage of women with atypical squamous cells of undetermined significance (ASC-US) and low-grade squamous intraepithelial lesions (LSIL) cytology results.

Search Strategy: Publications before April 27, 2024, were identified through PubMed, Embase, Web of Science, and Cochrane Library.

Selection Criteria: The studies have head-to-head comparison of p16/Ki-67 dual-staining and HPV testing in detecting high-grade cervical lesions.

Data Collection And Analysis: Two researchers independently screened articles by title, abstract, and full text. The GRADE and QUADAS-2 tool was used for quality evaluation. The pooled sensitivity and specificity for CIN2+ and CIN3+ were estimated using random effects models, with results and heterogeneity assessments presented in forest plots. Pretest-posttest probability (PPP) plots were constructed to evaluate the detection rates of CIN3+ in ASC-US and LSIL patients.

Main Results: Twenty-one studies with 6394 participants were included. The pooled specificity of p16/Ki-67 dual-staining was higher than that of HPV tests (CIN2+: 0.73 [95% confidence interval [CI] 0.65-0.80] versus 0.41 [95% CI 0.33-0.50]; CIN3+: 0.61 [95% CI 0.53-0.69] versus 0.33 [95% CI 0.23-0.45]). Summary receiver operating characteristic curve analysis demonstrated p16/Ki-67 dual-staining had better diagnostic accuracy for CIN2+ than HPV tests (area under the curve: 0.88 [95% CI 0.85-0.90] versus 0.79 [95% CI 0.75-0.82]). Pretest-posttest probability (PPP) plots highlighted the superior performance of p16/Ki-67 dual-staining for colposcopy referrals in LSIL patients.

Conclusions: P16/Ki-67 dual-staining offers greater specificity for detecting CIN2+/CIN3+ in ASC-US and LSIL triage, particularly for LSIL. It holds potential as an alternative to HPV tests in resource-limited settings or LSIL cases, warranting further research to refine its application in diverse populations.