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. 2020 Jul 6;123(7):1114–1122. doi: 10.1038/s41416-020-0964-x

Fig. 4. Overall survival (OS) of patients with OPSCC and positive test for p16INK4a expression but lacking detectable HPV–DNA (groups 1 and 2) in comparison with HPV-negative (n = 436, dashed black) and HPV16-driven (n = 184, dashed grey) OPSCC.

Fig. 4

Patients were stratified applying the separation border defined by PCA (Fig. 3c, d), resulting in patient group 1 (black) with and group 2 (grey) without a more severe risk profile. p: P value, log-rank test.