Research published in the Journal of Aging has found that good oral health contributes to longevity. They studied the association of dental health behaviours and the arrangement or condition of the teeth on all-cause mortality in 5,611 older adults from 1992 to 2009 and calculated risk estimates in men and women separately. Variables such as gender, body mass index (BMI), education, smoking status and history of chronic disease of the participants were taken into account before arriving at the conclusions.