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Objective: The association between jaw function and income in patients with temporomandibular disorders (TMDs) remain unclear. The aim of this study was to explore this association and its relationship with anxiety and depression. Subjects and Methods: A total of 451 TMD patients, including 361 males and 90 females, participated in this study. The sociodemographic information of patients and their questionnaires including the Generalised Anxiety Disorder 7‐item (GAD‐7), Patient Health Questionnaire 9‐item (PHQ‐9), and Jaw Functional Limitation Scale‐8 (JFLS‐8) were collected. Patients were divided into the high‐income and low‐income groups based on a household per capita income of 6000 RMB per month. Multiple regression and mediation analysis were used to explore the association between variables. The bootstrap method was applied to estimate confidence intervals (CIs). Results: Higher JFLS‐8 scores were significantly correlated with higher GAD‐7 scores (r = 0.361, p <.001), PHQ‐9 scores (r = 0.339, p <.001). Females and patients with low income had statistically higher JFLS‐8 scores (p <.01, p <.001). Mediation analysis with 10 000 bootstrap simulations revealed a significant direct association between JFLS‐8 scores and income (−2.920, 95% CI [−4.757, −1.044], p =.002). A significant indirect association of JFLS‐8 scores with income via GAD‐7 scores and PHQ‐9 scores was also observed (−0.889, 95% CI [−1.728, −0.164], p =.025), accounting for 23.3% of the total association. Conclusions: Low income is associated with impaired jaw function via anxiety and depression in patients with TMD. Clinicians may need to pay more attention to the psychological status of low‐income TMD patients in clinical practice. [ABSTRACT FROM AUTHOR]

Background Objective Materials and Methods Results Conclusions Temporomandibular joint disorders (TMDs) are common in young adults, and the link between chronotype profile and TMDs is unclear.This study examined TMD prevalence and chronotype distribution and explored the relationship between chronotype and TMDs in young adults.A total of 663 students from Sichuan University completed questionnaires. Chronotype profiles were assessed using the Morningness‐Eveningness Questionnaire, and TMDs were screened using the Fonseca Memory Index. To validate the findings, 68 TMD patients and 136 controls were enrolled.The prevalence of TMDs was 69.7%, with significant differences among chronotype profiles. The intermediate profile was the most common chronotype. Eveningness profile was associated with higher TMDs prevalence and severity. Muscle pain and side movement difficulty scores were higher in eveningness and intermediate profiles. Female gender (OR 2.345; 95% CI 1.668–3.297) was a TMD risk factor, while morningness profile (OR 0.537; 95% CI 0.297–0.970) was protective. Validation with TMD patients and controls supported these findings, showing higher eveningness profile prevalence in the TMD groups.TMDs have a high prevalence in college students, chronotype profiles shown to be associated with TMDs. Morningness is the protection factor in TMDs and PT, eveningness is a risk factor for IT. [ABSTRACT FROM AUTHOR]