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. Author manuscript; available in PMC: 2013 May 23.
Published in final edited form as: Head Neck. 2011 Nov 2;34(8):1111–1118. doi: 10.1002/hed.21867

Figure 2. The association between smoking and HNSCC stratified by HEL308 genotypes.

Figure 2

This figure displays the trend of HNSCC risk with the increase of smoking pack years separated by HEL308 genotypes (C/C+C/T and T/T). The plot was truncated at 100 pack years due to the small number of subjects smoking beyond that amount. A marked deviation between the two genotypes was observed beyond 70 smoking pack years. A likelihood ratio test for multiplicative interaction between smoking pack-years and HEL308 genotypes suggested significance (P interaction=0.026).