Smoking and dual using associated with poor periodontal health.

Aim: To investigate how snuff use, smoking and risk behaviour affect periodontal health and mortality in a Swedish cohort, hypothesizing that they indeed have a poor impact and increase the risk of death.

Material and methods: Study cohort of 1080 subjects aged 31 to 40 years (528 men and 552 women) from Stockholm area was clinically examined in 1985 and followed for mortality until 2015. Associations between periodontal health parameters, snuff use, smoking and age of death were analysed by classifying all subjects into four groups: "dual-users" (current snuffers and current smokers); "pure snuffers" (current non-smoking snuffers); "pure smokers" (current non-snuffing smokers) and "non-users" (non-snuffers, non-smokers). SPSS was used for analyses.

Inclusion Criteria:

• In 1985-1986 a sample was selected from the registry file of all inhabitants of the Stockholm area, of people born on the 20th of any month from 1945 to 1954.The sample comprised 3200 people. They were informed about the purpose of the study and called for clinical investigation. 1681 (52.5%) individuals, 840 men and 841 women, participated in the study. Subjects had different socio-economic and health backgrounds.

Exclusion Criteria:

• Other people. Any disease was not an exclusion criteria.

Swedish national database sample

Any underlying research materials related to present study could be accessed by e-mail birgitta.soder@ki.se.