Table 6 Population attributable risk percent (PAR%) associated with ever drinking alcohol regularly for head and neck cancer overall and by different sites according to the combinations of ALDH2 rs671 and ADH1B rs1229984.

From: Investigating the Association between Alcohol and Risk of Head and Neck Cancer in Taiwan

 

Overall

Ethanol metabolism group

Group 1Fast ADH1B (*2/*2) + Fast ALDH2 (*1/*1)

Group 2Fast ADH1B (*2/*2) + Slow/non-functional ALDH2 (*1/*2 + *2/*2)

Group 3Slow ADH1B (*1/*1 + *1/*2) + Fast ALDH2 (*1/*1)

Group 4Slow ADH1B (*1/*1 + *1/*2) + Slow/non-functional ALDH2 (*1/*2 + *2/*2)

Head and neck cancer

21.8%

a

21.3%

a

47.3%

Oral cancer

a

a

a

a

28.1%

Oropharyngeal cancer

55.7%

a

57.1%

92.0%

70.0%

Hypopharyngeal cancer

89.1%

a

89.9%

b

b

Laryngeal cancer

a

a

a

b

49.0%

  1. aPAR% was not calculated because the association was not statistically significant or the association showed a decreased risk associated with alcohol drinking.
  2. bPAR% was not calculated because the OR was not calculable due to zero count in the referent group.