{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T06:54:05Z","timestamp":1790146445568,"version":"4.0.1"},"reference-count":31,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2002,11,26]],"date-time":"2002-11-26T00:00:00Z","timestamp":1038268800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl Journal of Cancer"],"published-print":{"date-parts":[[2003,2,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>HPV infections are believed to be a necessary cause of cervical cancer. Viral burden, as a surrogate indicator for persistence, may help predict risk of subsequent SIL. We used results of HPV test and cytology data repeated every 4\u20136 months in 2,081 women participating in a longitudinal study of the natural history of HPV infection and cervical neoplasia in S\u00e3o Paulo, Brazil. Using the MY09\/11 PCR protocol, 473 women were positive for HPV DNA during the first 2 visits. We retested all positive specimens by a quantitative, low\u2010stringency PCR method to measure viral burden in cervical cells. Mean viral loads and 95% CIs were calculated using log\u2010transformed data. RRs and 95% CIs of incident SIL were calculated by proportional hazards models, adjusting for age and HPV oncogenicity. The risk of incident lesions increased with viral load at enrollment. The mean number of viral copies\/cell at enrollment was 2.6 for women with no incident lesions and increased (trend <jats:italic>p<\/jats:italic> = 0.003) to 15.1 for women developing 3 or more SIL events over 6 years of follow\u2010up. Compared to those with &lt;1 copy per cell in specimens tested during the first 2 visits, RRs for incident SIL increased from 1.9 (95% CI 0.8\u20134.2) for those with 1\u201310 copies\/cell to 4.5 (95% CI 1.9\u201310.7) for those with &gt;1,000 copies\/cell. The equivalent RR of HSIL for &gt;1,000 copies\/cell was 2.6 (95% CI 0.5\u201313.2). Viral burden appears to have an independent effect on SIL incidence. Measurement of viral load, as a surrogate for HPV persistence, may identify women at risk of developing cervical cancer precursors. \u00a9 2002 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ijc.10846","type":"journal-article","created":{"date-parts":[[2002,12,12]],"date-time":"2002-12-12T14:09:22Z","timestamp":1039702162000},"page":"519-524","source":"Crossref","is-referenced-by-count":115,"title":["Viral load as a predictor of the risk of cervical intraepithelial neoplasia"],"prefix":"10.1002","volume":"103","author":[{"given":"Nicolas F.","family":"Schlecht","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Trevisan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eliane","family":"Duarte\u2010Franco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas E.","family":"Rohan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Ferenczy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luisa L.","family":"Villa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo L.","family":"Franco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2002,11,26]]},"reference":[{"key":"e_1_2_6_2_2","unstructured":"RousseauMC TrevisanA VillaL RohanT FrancoE.Viral load as a predictor of HPV infection persistence among women in the Ludwig\u2010McGill cohort study in Sao Paulo Brazil. 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