Conclusion This multicentre study conducted across nine European countries has many strengths, including its large sample size. Most importantly, it adjusted for smoking and alcohol consumption, which are well-established risk factors for these cancers and could otherwise influence the association between oral health and dental hygiene and these cancers. The researchers also adjusted for other potential risk factors, such as socioeconomic status and how much fruit and vegetables people ate. However, there are some potential limitations. Although the researchers have made every effort to adjust for these confounders, as the researchers themselves acknowledge, the questions asked about these lifestyle factors may not fully capture a person’s smoking habits, alcohol use and diet, so there is…
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