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. 2015 Oct 14;108(1):djv302. doi: 10.1093/jnci/djv302

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Published by Oxford University Press 2015. This work is written by (a) US Government employee(s) and is in the public domain in the US.

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Figure 2. — Type-specific concordance of human papillomavirus (HPV) 16/18 infections at the four-year follow-up visit among 2092 women in the control arm and 2094 women in the HPV vaccine arm. The kappa for anal/cervical HPV16/18 agreement was 0.44 (95% confidence interval [CI] = 0.37 to 0.51) for the control arm and 0.13 (95% CI = 0.03 to 0.23) for the vaccine arm. The percentages on the figure indicate the amount of HPV16/18 infections that were concordant at another anatomic site. Seventy-five of the 79 concordant infections were anal/cervical infections. One individual was infected at all three sites. HPV = human papillomavirus.