Exploring the Relationship Between Somatisation, Facial Pain and Psychological Distress in East Asian Temporomandibular Disorder Patients

ABSTRACT Objectives The relationship of somatisation with facial pain duration/intensity, pain‐related interference/disability and psychological distress was investigated in East Asian temporomandibular disorder (TMD) patients. Correlations between somatisation, facial pain and psychological characteristics were also explored alongside the demographic/physical factors associated with moderate‐to‐severe depression and anxiety. Methods Anonymised data were acquired from records of consecutive ‘first‐time’ patients seeking TMD care at a tertiary oral medicine clinic. Axis I physical TMD diagnoses were established utilising the diagnostic criteria for TMDs (DC/TMD) protocol and patients with TMD pain were stratified into those with pain‐related (PT) and combined (CT) conditions. Axis II measures administered encompassed the Patient Health Questionnaire‐15 (PHQ‐15), Graded Chronic Pain Scale (GCPS), Patient Health Questionnaire‐9 (PHQ‐9) and General Anxiety Disorder Scale‐7 (GAD‐7). Individuals with PT and CT were further categorised into those without (Pain − Som/Comb − Som) and with somatisation (Pain + Som/Comb + Som). Statistical evaluations were performed with nonparametric and logistic regression analyses ( α = 0.05). Results The final sample comprised 473 patients (mean age 36.2 ± 14.8 years; 68.9% women), of which 52.0% had concomitant somatisation. Significant differences in pain duration (Comb + Som > Pain − Som), pain‐related interference/disability (Comb + Som > Comb − Som) and depression/anxiety (Pain + Som, Comb + Som > Pain − Som, Comb − Som) were discerned. Depression/anxiety was moderately correlated with somatisation ( r s = 0.64/0.52) but not facial pain characteristics. Multivariate modelling revealed that somatisation was significantly associated with the prospects of moderate‐to‐severe depression (OR 1.35) and anxiety (OR 1.24). Conclusion Somatisation exhibited a strong association with psychological distress when contrasted with facial pain in East Asian TMD patients.