title: Relationship between impacts attributed to malocclusion and psychological stress in young Japanese adults.
abstract: Identifying risk factors is important to prevent a wide range of health-damaging behaviours and to improve the quality of life of young people. The aim of this study was to investigate the relationship between impacts on daily performance attributed to malocclusion and psychological stress in healthy young Japanese adults. Medical and oral health data were collected during a cross-sectional examination conducted by the Health Service Center of Okayama University. Systemically healthy non-smoking students aged 18 and 19 years (n = 641; 329 males and 312 females) were included. Malocclusion was defined using a modified version of the Index of Orthodontic Treatment Need (IOTN). The impacts on daily performance attributed to malocclusion and psychological stress were assessed using self-reported questionnaires, the condition-specific oral impacts on daily performances (CS-OIDP), and the Hopkins Symptoms Checklist. Mann-Whitney U- and chi-square tests and structural equation modelling (SEM) were used for statistical analysis. Forty per cent of subjects had a malocclusion (n = 255). Subjects with impacts on daily performance had a significantly higher prevalence of malocclusion than those without impacts (P < 0.001). SEM showed that psychological stress, especially interpersonal sensitivity and depression, was significantly correlated with CS-OIDP and malocclusion. Negative impacts on daily performance attributed to malocclusion may contribute to psychological stress in young Japanese adults.
authors.affiliation: Department of Preventive Dentistry, Okayama University, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Ekuni
authors.forename: Michiko
authors.initials: M
authors.lastname: Furuta
authors.forename: Koichiro
authors.initials: K
authors.lastname: Irie
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Azuma
authors.forename: Takaaki
authors.initials: T
authors.lastname: Tomofuji
authors.forename: Takashi
authors.initials: T
authors.lastname: Murakami
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamashiro
authors.forename: Toshio
authors.initials: T
authors.lastname: Ogura
authors.forename: Manabu
authors.initials: M
authors.lastname: Morita
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology; D000293:Adolescent; D017281:Cost of Illness; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000523:psychology*; D009909:Oral Health; D011788:Quality of Life / Q000523:psychology*; D012307:Risk Factors; D013315:Stress, Psychological / Q000523:psychology*; D055815:Young Adult