Alexithymia, oral behaviors, and temporomandibular disorders: a dark triad?

Middle East Current Psychiatry

Table 6 Results of multivariable linear regression for TMD-risk score and logistic regression for TMD-risk category

Model 1 (Predictors of TMD-risk score)
Predictor	Estimate (B)	SE	OR	95% confidence interval		p
Predictor	Estimate (B)	SE	OR	Lower	Upper	p
Intercept	− 19.21	1148.99	4.55E-09	0	Inf	0.987
Age	0.03	0.03	1.026	0.96	1.09	0.436
Gender: Female^a
Male	− 0.37	0.46	0.693	0.28	1.71	0.425
Alexithymia category: no alexithymia^a
Possible alexithymia	0.01	0.60	1.014	0.31	3.3	0.981
Alexithymia	0.31	0.55	1.362	0.46	4	0.575
SSS category: no to minimal^a
SSS: low	14.39	1148.99	1.79E + 06	0	Inf	0.990
SSS: medium	15.47	1148.99	5.26E + 06	0	Inf	0.989
SSS: high	16.18	1148.99	1.06E + 07	0	Inf	0.989
SSS: very high	16.04	1148.99	9.25E + 06	0	Inf	0.989
BRCS category: low^a
BRCS: medium	− 0.43	0.56	0.65	0.24	1.79	0.409
BRCS: high	− 0.64	0.59	0.53	0.16	1.71	0.285
OBC grades: low risk^a
OBC: high risk	2.17	0.49	8.77	3.31	23.19	< 0.001
Model 2 (Predictors of TMD-risk category)
Predictor	Estimate (B)	SE	t	95% confidence interval		P
Predictor	Estimate (B)	SE	t	Lower	Upper	P
Intercept	− 2.09	0.61	− 3.41	− 3.29	− 0.88	< 0.001
Age	0.01	0.01	0.85	− 0.02	0.04	0.396
Gender
Male^a
Female	0.37	0.17	2.19	0.04	0.71	0.03
Total alexithymia score	0.02	0.01	2.88	0.01	0.04	0.004
Total OBC score	0.07	0.01	9.65	0.06	0.08	< 0.001

Model 1, Nagelkerke pseudo-R² = 26.8%, HL p = 0.860; model 2, R² = 0.35
BRCS Brief resilient coping scale, OBC Oral Behavior Checklist, SSS Somatic symptom scale
^aRepresents reference level; dependent variable reference: no-risk category