Table 1.

Domains and measures administered premorbid, concurrent, and following TMD onset. The selected variables were identified based on prior univariate analyses [5; 16; 19; 32; 38]. Grayed box indicates administration of measure, and empty box indicates variable was not measured. Visit 1 refers to enrollment, Visit 2 refers to the clinic visit associated with TMD pain onset (cases) or by invitation (matched controls), and Visit 3 refers to the approximate 6-month follow-up.

Domain, sub-domain, instrument, and measure	Visit 1	Visit 2	Visit 3
Clinical Measures
Examination Findings Research Diagnostic Criteria Exam: Pain-free jaw opening (mm), Maximum unassisted jaw opening (mm) [15] Clinical Exam: Painful body (non-jaw) sites from palpation (#)
Pain & Physical Symptoms Comprehensive Pain & Symptom Questionnaire: Non-specific Orofacial Symptoms (#), Headache Types (#), Comorbid Conditions (#) [32; 33]
Function and Parafunction Jaw Functional Limitation Scale (JFLS): Scores from JFLS-Chew, JFLS-Open, JFLS-Verbal and Emotional Expression subscales [34] Oral Behaviors Checklist (OBC): Total Score for oral parafunctional behavior [28; 31]
Health Status Measures
Pittsburgh Sleep Quality Index: Global Score [7] Medical Outcomes Study Short Form 12 Item Version 2 (SF-12v2): Physical Composite Score, Mental Composite Score [51]
Psychological Measures
Stress and Affect Perceived Stress Scale: Total Score [10] Life Experiences Survey: Negative Impact Score [16; 17; 39] Lifetime Stressor List: PTSD Checklist-Civilian: Total Symptom Score [52] State Anxiety Inventory: Total Score [46] Profile of Mood States-Bipolar: Positive Affect, Negative Affect [25]
Somatic Symptoms and Other Psychological Characteristics Pennebaker Inventory of Limbic Languidness (PILL): Total Score [35] Kohn Reactivity Scale: Total Score [23] Symptom Checklist-90 Revised: Somatization subscale score, Depression subscale score [12] Trait Anxiety Inventory: Total Score [46] Pain Catastrophizing Scale: Total Score [47]
Quantitative Sensory Testing Measures
Pressure Pain Thresholds: Temporalis, Masseter, TMJ, Trapezius, Epicondyle [20]
Heat Pain: Pain Tolerance (°C), Peak Pain Rating and Pain After- sensation (15s) to temporal summation (48°C) [19]
Mechanical Cutaneous Pain: Pain Threshold (mN), Pain Rating and Pain After-sensation (15s) to temporal summation @512 mN [19]