Table 1: Questionnaire

Question Items Abbreviated Form
Q1 If you open your mouth wide, can you fit 3 fingers held vertically in your mouth? Limited mouth opening
Q2 Do you experience pain in the face, jaw, temple, or in the front of the ear when you open and close your mouth? Mouth-opening pain
Q3 Can you open your mouth without any deviation? Mouth-opening deviation
Q4 Do you experience pain in the face, jaw, temple, or in the front of the ear when you eat hard foods such as beef jerky, dried cuttlefish, or octopus? Chewing-induced pain
Q5 Do you experience stress at work, school, home, or in relationships? Stress level
Q6 Do you experience anxiety at work, school, home, or in relationships? Feeling of anxiety
Q7 Do you feel depressed now? Depressed mood
Q8 Do you feel fatigued even after obtaining rest through sleeping? Chronic fatigue
Q9 Do you often allow your upper- and lower teeth to make continuous contact during work or at rest? TCH*
Q10 Do you experience orofacial jaw muscle fatigue or pain when you are awake? Morning symptoms

All the questions were evaluated using a 5-grade rating scale: 1) strongly agree, 2) weakly agree, 3) neither agree nor disagree, 4) weakly disagree, 5) strongly disagree. TCH: tooth contacting habit.