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. 2020 Jun 29;20:179. doi: 10.1186/s12903-020-01161-z

Table 7.

Changes compared to baseline in all measures in 40- and 60- min trials in 16 women

40-min Trial P-value 60-min Trial P-value
Baseline End# Baseline End#
Fatigue 6 (0) 14.5 (3) < 0.001* 6 (0) 12.5 (6) 0.005*
Pain characteristics
 Pain Intensity 0 (0) 0 (5) 0.86 0 (0) 0 (3) 0.58
 Pain Area 0 (0) 5.00 (78.75) 0.05 0 (0) 67.00 (125.00) 0.08
Pain Pressure Thresholds
 Masseter Muscles 100.00 (0) 85.50 (21.38) 0.19 100.00 (0) 97.50 (22.38) 0.77
 Temporal Muscles 100.00 (0) 95.50 (25.75) 0.95 100.00 (0) 95.50 (31.88) 0.91
 Index Finger (Reference) 100.00 (0) 89.25 (32.50) 0.87 100.00 (0) 112.50 (28.13) 0.50
Functional Measures
 Max Bite Force 100.00 (0) 91.00 (53.40) 0.17 100.00 (0) 99.20 (85.70) 0.82
 Max Mouth Opening 100.00 (0) 96.40 (5.90) 0.13 100.00 (0) 100.00 (4.90) 0.17

The subjective fatigue was assessed in Borg’s RPE, the pain intensity (=peak pain) in numeric rating scale (NRS), the pain area in arbitrary units (au), the change in pressure pain threshold in percent (%), the change in maximum voluntary bite force in percent (%) and the change in maximum voluntary mouth opening capacity in percent (%). Data are expressed as median (IQR; interquartile range). P-values refer to the comparisons to baseline data by Friedman’s analysis of variance for repeated measures with Tukey post-hoc test. * = significant difference P < 0.05. #End refers to end of chewing