Effects of Physical Activity and Mental Health on Chewing Difficulty in South Korean Adults: A Cross-Sectional...

This study aimed to investigate the effects of physical activity and mental health on chewing difficulty in South Korean adults using data from the seventh Korea National Health and Nutrition Examination Survey (KNHANES VII, 2016-2018).

A total of 8212 participants aged ≥20 years who completed surveys on their physical activity, mental health, and chewing status were included. Chewing difficulty was assessed via a five-point Likert scale based on self-reported discomfort when chewing due to oral problems, and dichotomized for analysis. The participants were divided into two groups: those aged <40 and those aged ≥40 years. Complex sample analyses, including cross-tabulations and logistic regression, were used to examine the associations.

Among men aged <40, high perceived stress was associated with 1.71 times higher odds of experiencing chewing difficulty (p < 0.05). For men aged ≥40, high perceived stress (OR of 1.45) and a sleep duration of <7 h (OR of 1.32) were significant risk factors (p < 0.05). In women aged ≥40 years, high Patient Health Questionnaire 9 (PHQ-9) scores (≥10; OR of 2.35) and high perceived stress (OR of 1.64) were significantly associated with chewing difficulty (p < 0.001).

Perceived stress, insufficient sleep, and depression are significant mental health factors associated with chewing difficulty in adults. These findings emphasize the necessity of a multifaceted approach, including psychosocial mental health issues, to effectively manage chewing difficulty in this population.