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A Comparison of Linear Array and Hybrid Capture 2 for Detection of Carcinogenic Human Papillomavirus and Cervical Precancer in ASCUS-LSIL Triage Study

¹ Departments of Epidemiology and Molecular Microbiology and Immunology, Johns Hopkins University, Baltimore, Maryland; Divisions of ² Cancer Epidemiology and Genetics and ³ Cancer Prevention, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda, Maryland; and ⁴ Departments of Molecular Genetics and Microbiology and Obstetrics and Gynecology, University of New Mexico Health Sciences Center, School of Medicine, Albuquerque, New Mexico

Requests for reprints: Philip E. Castle, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Department of Health and Human Services, Room 5004, EPS MSC 7234, 6120 Executive Boulevard, Bethesda, MD 20892-7234. Phone: 301-435-3976; Fax: 301-402-0916. E-mail: castlep{at}mail.nih.gov

Background: We were interested in comparing the performance of Linear Array (LA; Roche Molecular Systems) to Hybrid Capture 2 (hc2; Digene) for the detection of carcinogenic human papillomavirus (HPV) and cervical precancer.

Methods: LA and hc2 results were compared on baseline specimens collected from women with an atypical squamous cells of undetermined significance (ASCUS) Pap referred into ASCUS and Low-Grade Squamous Intraepithelial Lesion Triage Study (n = 3,488). hc2 was conducted at the time of the study on liquid cytology specimens. LA was conducted retrospectively on aliquots from a second, stored cervical specimen masked to the hc2 results and clinical data. Paired LA and hc2 results (n = 3,289; 94%) were compared for the detection of carcinogenic HPV (HPV 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66, and 68) and 2-year cumulative cervical intraepithelial neoplasia (CIN) grade 3 as diagnosed by the quality-control pathology review.

Results: LA was more likely to test positive for carcinogenic HPV than hc2 (55% versus 53%; P = 0.001). For 2-year cumulative CIN3, LA and hc2 had similar sensitivities (93.3% versus 92.6%, respectively; P = 1), and LA was marginally less specific than hc2 (48.1% versus 50.6%, respectively; P = 0.05). LA and hc2 had similar negative predictive values (98.70% versus 98.64% respectively; P = 0.4), and LA had a slightly lower positive predictive value than hc2 (14.6% versus 15.1%, respectively; P < 0.0001).

Conclusion: We observed that LA and hc2 performed similarly in the detection of carcinogenic HPV and identification of CIN3 among women with an ASCUS Pap. (Cancer Epidemiol Biomarkers Prev 2008;17(5):1248–54)

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