# Is Starch Intake Associated With Periodontal Status? An 11‐Year Longitudinal Analysis Among Finnish Adults

## TL;DR

This study found no long-term link between starch intake and periodontal health in Finnish adults over 11 years.

## Contribution

The study provides new longitudinal evidence on the relationship between starch consumption and periodontal outcomes.

## Key findings

- Baseline starch intake was not associated with changes in periodontal pocketing over 11 years.
- Wholegrain intake at baseline was linked to better initial periodontal status.
- No significant associations were found between other starch sources and periodontal changes.

## Abstract

To evaluate the association between baseline starch intake (amount and sources) and changes in periodontal status over 11 years in adults.

Adults aged 30–82 years, who participated in the Finnish Health 2000 survey and were re‐examined in 2004/2005 and/or 2011 were included in the study. The consumption of total starch and six relevant food groups (potatoes, fried potatoes, roots and tubers, pasta, wholegrains and legumes) over the past year was determined at baseline with a validated food frequency questionnaire. The number of teeth with periodontal pocketing ≥ 4 mm (NTPP) was recorded during clinical examinations in 2000, 2004/2005 and 2011. The association between baseline starch intake and the 11‐year change in the NTPP was tested in mixed‐effects negative binomial regression models, adjusting for covariates.

A total of 1369 adults were included in the analysis. The mean NTPP was 4.1 ± 5.6, 6.3 ± 5.6, and 4.8 ± 5.9 in waves 1, 2 and 3, respectively. Baseline starch intake (in g/day or % energy intake) was not associated with changes in the NTPP after adjustment for covariates. In analysis by food groups, the baseline intake of wholegrains was negatively associated with the NTPP at baseline.

This study found no evidence of an association between baseline starch intake and changes in periodontal status. Baseline intake of wholegrains was associated with better periodontal status at baseline.