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The HPV-Risk assay is a novel real-time PCR assay targeting the E7 region of 15 high-risk human papillomavirus (HPV) types (i.e., HPV16, -18, -31, -33, -35, -39, -45, -51, -52, -56, -58, -59, -66, -67, and -68), and provides additional genotype information for HPV16 and HPV18. This study evaluated the clinical performance and reproducibility of the HPV-Risk assay with cervical scraping specimens and its utility with self-collected (cervico)vaginal specimens. The clinical performance of the HPV-Risk assay for cervical intraepithelial neoplasia of grade 2 or worse (CIN2+) with cervical scraping specimens was evaluated by a noninferiority analysis, relative to high-risk HPV GP5+/6+ PCR, following international guidelines for HPV test requirements for cervical cancer screening. The HPV-Risk assay showed clinical sensitivity for CIN2+ of 97.1% (95% confidence interval [CI], 89.1 to 99.3%; 67/69 samples) and a clinical specificity for CIN2+ of 94.3% (95% CI, 92.5 to 95.7%; 777/824 samples). The clinical sensitivity and specificity were noninferior to those of GP5+/6+ PCR (noninferiority score test, P=0.006 and 0.0003, respectively). Intralaboratory reproducibility over time (99.5% [95% CI, 98.6 to 99.8%]; 544/547 samples, kappa=0.99) and interlaboratory agreement (99.2% [95% CI, 98.6 to 99.8%]; 527/531 samples, kappa=0.98) for the HPV-Risk assay with cervical scraping specimens were high. The agreement of the HPV-Risk assay results for self-collected (cervico)vaginal specimens and clinician-obtained cervical scraping specimens was also high, i.e., 95.9% (95% CI, 85.1 to 99.0%; 47/49 samples, kappa=0.90) for self-collected lavage samples and 91.6% (95% CI, 84.6 to 95.6%; 98/107 samples, kappa=0.82) for self-collected brush samples. In conclusion, the HPV-Risk assay meets the cross-sectional clinical and reproducibility criteria of the international guidelines for HPV test requirements and can be considered clinically validated for cervical screening purposes. The compatibility of the HPV-Risk assay with self-collected specimens supports its utility for HPV self-sampling.

Clinical Validation of the HPV-Risk Assay, a Novel Real-Time PCR Assay for Detection of High-Risk Human Papillomavirus DNA by Targeting the E7 Region