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Fig. 4 | BMC Cancer

Fig. 4

From: Tobacco exposure as a major modifier of oncologic outcomes in human papillomavirus (HPV) associated oropharyngeal squamous cell carcinoma

Fig. 4

Competing risks models for causes of relapse 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 relapse events (black), loco-regional relapse events (green) and distant metastasis events (red)

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