Table 2 Logistic regression analysis for predicting sleep bruxism.

From: Clinical, psychological, and hematological factors predicting sleep bruxism in patients with temporomandibular disorders

Parameters

Analysis 1: Single logistic regression analysis

Analysis 2: Multiple logistic regression analysis with backward selection

OR

Lower 95% CI

Upper 95% CI

p-value

OR

Lower 95% CI

Upper 95% CI

p-value

Demographics

Sex (Female)

2.267

0.541

9.495

0.263

    

Age (Years)

0.939

0.905

0.975

0.001**

0.905

0.842

0.972

0.006**

BMI (kg/m2)

1.106

0.964

1.270

0.152

    

Clinical characteristics

Symptom duration (Months)

1.001

0.992

1.009

0.887

    

Chronicity

2.025

0.784

5.229

0.145

    

TMJ noise

13.292

4.536

38.949

< 0.001***

    

TMD pain

12.316

3.226

47.017

< 0.001***

    

Pain intensity (NRS)

0.909

0.769

1.075

0.264

    

Pain intensity (CMI)

2.624

1.046

6.584

0.040*

18.400

2.323

145.731

0.006**

LMO

4.091

1.382

12.109

0.011*

    

Tinnitus

5.517

1.090

27.922

0.039*

    

Sleep characteristics

Sleep problem

3.378

1.295

8.813

0.013*

    

Sleep Quality (PSQI global score)

1.158

1.032

1.299

0.013*

    

Poor sleeper

3.556

1.144

11.055

0.028*

11.425

1.327

98.364

0.027*

OSA (STOP-Bang score)

1.119

0.817

1.532

0.483

    

OSA (High risk of OSA)

1.539

0.628

3.773

0.345

    

Psychological characteristics

Psychological stress

3.117

1.169

8.308

0.023*

    

SOM

1.006

0.967

1.047

0.763

    

O-C

1.015

0.969

1.063

0.525

    

I-S

1.060

1.010

1.112

0.018*

    

DEP

1.055

1.004

1.108

0.033*

1.189

1.035

1.365

0.014*

ANX

1.062

1.017

1.109

0.006**

1.081

1.004

1.164

0.040*

HOS

1.032

0.972

1.097

0.303

    

PHOB

1.017

0.975

1.061

0.433

    

PAR

0.988

0.952

1.026

0.543

    

PSY

1.010

0.969

1.051

0.647

    

Hematological factors

Cortisol (ug/dL)

1.099

1.003

1.205

0.043*

    

ACTH (pg/mL)

1.032

1.009

1.056

0.006**

1.073

1.011

1.139

0.019*

CAR

1.035

1.004

1.066

0.025*

1.151

1.040

1.275

0.007**

ESR (mm/h)

1.012

0.986

1.039

0.383

    
  1. To obtain significant results, the two-tailed level of statistical significance was set at p < 0.05. *p < 0.05, **p < 0.01, ***p < 0.001. OR odds ratio, CI confidence interval, LMO limited mouth opening, CMI craniomandibular index, TMJ temporomandibular joint, TMD temporomandibular disorder, 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); BMI body mass index, in.: inch, OSA obstructive sleep apnea, SCL-90-R symptom checklist 90-revised, 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
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