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. 2013 May 29;42(1):36. doi: 10.1186/1916-0216-42-36

Table 2.

Incidence rate of upper aerodigestive tract (UADT) and non-upper aerodigestive tract (non-UADT) second primary tumours by p16 status

 
Incidence rate per 100 patient-yrs (Confidence interval)
 
  p16 + p16 - p-value
UADT
0.7
8.5
<0.0001*
 
(0.3 – 1.4)
(5.7 – 12.4)
 
Non-UADT
0.9
2.1
0.116
  (0.9 – 4.7) (0.4 – 1.8)  

p < 0.05 considered statistically significant.