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. 2020 Sep 23;20:912. doi: 10.1186/s12885-020-07427-7

Fig. 3.

Fig. 3

Competing risks models for causes of death in subpopulations stratified by human papillomavirus (HPV) and tobacco exposure: (a) HPV- & pack-years (PY) ≤30; (b) HPV- & PY > 30; (c) HPV+ & PY ≤30; and (d) HPV+ & PY > 30. Lines are curves fitting all cause death events (black), cancer-specific death events (red) and non-cancer death events (blue)