Fig. 1

Heatmap illustrating the relationships among sleep bruxism, clinical characteristics, sleep-related parameters, psychological distress, and hematological factors in all patients with TMD. The results were derived from Cramer’s V analysis. TMJ temporomandibular joint, TMD temporomandibular disorder, NRS numeric rating scale, CMI craniomandibular index, LMO limited mouth opening, PSQI pittsburgh sleep quality index, STOP-Bang S stands for snore, T tired, O observed apneas, P pressure (arterial hypertension), B BMI (body mass index > 35 kg/ m2), a age (> 50 years old), n neck circumference (> 40 cm), and g gender (male), OSA: obstructive sleep apnea, SOM somatization, O-C obsessive-compulsive, I-S interpersonal sensitivity, DEP depression, ANX anxiety, HOS hostility, PHOB phobic anxiety, PAR paranoid ideation, PSY psychoticism, ACTH adrenocorticotropic hormone, CAR cortisol/ACTH ratio, ESR erythrocyte sedimentation rate.