Alcohol consumption, tobacco smoking, betel quid chewing and oral health associations with hypopharyngeal cancer among men in Central South China: a case–control study

In this study, we have shown for what is believed to be the first time the association of increased hypopharyngeal cancer incidence with alcohol, tobacco, betel quid and oral hygiene in China. Alcohol may play a larger role for hypopharyngeal cancer in this population than in populations in other areas.