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Table 2 Distribution of event number, event length in different types of sleep bruxism

From: Identification of the occurrence and pattern of masseter muscle activities during sleep using EMG and accelerometer systems

  Event number (/hour) Event length (sec/hour)
  Mean s.d. Min-Max (%) Mean s.d. Min-Max (%)
Grinding 6.5 3.4 1.8–15.5 (32.3) 61.3 45.3 17.0–160.0 (56.8)
Clenching 8.7 4.7 1.5–18.9 (43.3) 40.4 51.7 1.60–211.5 (37.4)
Tapping 4.9 3.6 0–10.4 (24.4) 6.3 3.5 1.2–12.7 (5.8)
Total 20.1    (100) 108.0 90.4   (100)