Snuff Use, Smoking, Periodontitis and Mortality: 30-year Cohort Study From Sweden

Completed

• Conditions: Tobacco Use; Periodontitis

• Registration Number: NCT03918902
• Lead Sponsor: University of Helsinki

Brief Summary

Smoking and dual using associated with poor periodontal health.

Detailed Description

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.

Study Timeline

• Study Start: 2016-01-01
• Primary Completion: 2018-04-01
• Study Completion: 2018-04-01
• Status Verified: 2019-04
• Study First Submitted: 2019-04-03
• Study First Submitted QC: 2019-04-14
• Last Update Submitted: 2019-04-14
• Study First Posted: 2019-04-18
• Last Update Posted: 2019-04-18

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 1080

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Calculus index	1985	Calculus index was scored from 0 (no calculus) to 3 (abundant calculus) according to Greene \& Vermillion.
Deep periodontal pockets (5mm or over)	1985	Periodontal pockets were measured from all teeth and from six surfaces with a Hu-Friedy (PCPUNC 15) periodontal probe (Hu-friedy, Chicago, Ill., USA).
Missing teeth	1985	Missing teeth were calculated my dentist in clinical examination.
Premature death	From year 1985 to year 2015	The Swedish National Death Register listing the cumulated causes of all deaths was used in the analyses.
Plaque index	1985	Plaque index was scored from 0 (no plaque) to 3 (abundant plaque).
Gingival index	1985	Gingival index was scored from 0 (no gum bleeding) to 3 (abundant gum bleeding).