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Published on: February 14, 2018
Increased Waist Circumference after One-Year Is Associated with Poor Chewing Status
Riku Yamazaki1, Komei Iwai2, Tetsuji Azuma2
1Department of Orthodontics, School of Dentistry, Asahi University, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan.
Background:
This study aimed to investigate the relationship between an increase in waist circumference (WC) after 1 year and self-reported chewing status in 10,870 Japanese adults who had received health checkups. Subsequently, 8068 participants were included in the final analysis.
Methods:
We defined an increase in WC ≥ 5 cm after 1 year as an unhealthy increase; in total, 613 (7.5%) respondents met this criterion. Chewing status was evaluated using a self-reported questionnaire at baseline; 1080 (13%) respondents were diagnosed with poor chewing status.
Results:
After adjusting for age, gender, WC, body mass index (BMI), and chewing status, an increase in WC ≥ 5 cm was found to be positively associated with gender (females: odds ratios [ORs]: 1.206; 95% confidence intervals [CIs]: 1.008-1.443), WC (ORs: 0.967; 95% CIs: 0.954-0.981), BMI (≥25 kg/m2; ORs: 2.194; 95% CIs: 1.715-2.808), and chewing status (poor; ORs: 1.356; 95% CIs: 1.084-1.697).
Conclusions:
These findings suggest that increased WC after 1 year was associated with self-reported poor chewing status in Japanese adults.
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