Age-adjusted incidence rates of potentially HPV-associated and non HPV-associated HNC for males and females by age and stage^a, 1995–2005.

<p>HNC: head and neck cancer; HPV: human papillomavirus; 95% CI: 95% Confidence Interval.</p><p>Rates are per 100,000 and age-adjusted to the 2000 U.S. Standard Population (19 age groups – Census P25-1130).</p><p>Confidence intervals (Tiwari model) are 95% for rates.</p>a<p>For 1995–2000, SEER Summary Stage 1997 was used; for 2001–2003, SEER Summary Stage 2000 was used; for 2004–2005, Derived SEER Summary Stage 2000 was used.