title: Associations of pain intensity and pain-related disability with psychological and socio-demographic factors in patients with temporomandibular disorders: a cross-sectional study at a specialised dental clinic.
abstract: The study assessed whether psychological and socio-demographic factors, including somatisation, depression, stress, anxiety, daytime sleepiness, optimism, gender and age, are associated with pain intensity and pain-related disability in patients with temporomandibular disorders (TMDs). In total, 320 TMD patients were involved in the study. The psychological status of each patient was assessed with questionnaires, including the Symptom Checklist-90 (SCL-90), Epworth Sleeping Scale (ESS), stress questionnaire and Life Orientation Test-Revised (LOT-R). TMD pain, including pain intensity and pain-related disability, was assessed with characteristic pain intensity (CPI) and disability points scales. The associations of psychological and socio-demographic factors with pain intensity and pain-related disability were assessed through logistic regression analyses. Higher pain intensity was significantly associated with more severe anxiety (P = 0·004), more severe somatisation (P < 0·001), more severe depression (P < 0·001), more severe stress (P = 0·001) and lower optimism (P = 0·025) in univariate regression analyses. However, multiple regression analysis showed that only somatisation was significantly associated with pain intensity (P < 0·001). Higher pain-related disability was significantly associated with more severe anxiety (P < 0·001), more severe somatisation (P < 0·001), more severe depression (P < 0·001), more severe stress (P < 0·001) and lower optimism (P = 0·003) in univariate regression analyses. However, multiple regression analysis showed that only depression was significantly associated with pain-related disability (P = 0·003). Among the psychological and socio-demographic factors in this study, somatisation was the best predictor of pain intensity, while depression was the best predictor of pain-related disability.
authors.affiliation: State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China.|Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.|Department of Social Dentistry, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands.
authors.forename: N
authors.initials: N
authors.lastname: Su
authors.affiliation: Department of Oral Kinesiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands.
authors.forename: F
authors.initials: F
authors.lastname: Lobbezoo
authors.affiliation: Department of Social Dentistry, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands.
authors.forename: A
authors.initials: A
authors.lastname: van Wijk
authors.affiliation: Department of Social Dentistry, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands.
authors.forename: G J M G
authors.initials: GJ
authors.lastname: van der Heijden
authors.affiliation: Department of Oral Kinesiology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University Amsterdam, MOVE Research Institute Amsterdam, Amsterdam, The Netherlands.
authors.forename: C M
authors.initials: CM
authors.lastname: Visscher
mesh_terms: D000328:Adult; D001007:Anxiety / Q000209:etiology*; D003430:Cross-Sectional Studies; D003740:Dental Clinics; D003863:Depression / Q000209:etiology*; D005157:Facial Pain / Q000209:etiology / Q000503:physiopathology / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands / Q000453:epidemiology; D010147:Pain Measurement; D012720:Severity of Illness Index; D018434:Sickness Impact Profile; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000503:physiopathology / Q000523:psychology*
keywords: association; chronic pain; depression; mental disorders; somatoform disorders; temporomandibular joint disorders