Table 1c.
Characteristics of the study population – experimental pain measures
| Characteristic | Controls | All TMD cases | TMD w/o WPT | TMD with WPT |
|---|---|---|---|---|
| Mean(SD) | Mean(SD) | Mean(SD) | Mean(SD) | |
| Heat Pain (C°) | ||||
| Threshold | 42.5 (2.1) | 42.5 (2.2) | 42.5 (2.0) | 42.6 (2.3) |
| Tolerance | 47.2 (1.4) | 47.0 (1.8) | 47.3 (1.4) | 46.7 (2.1) |
| Delta (Tolerance – Threshold) | 4.7 (2.0) | 4.5 (2.1) | 4.8 (1.9) | 4.1 (2.2) |
| PPT in Facial Region (kg/cm2) | ||||
| Temporalis* | 3.2 (0.7) | 2.3 (0.7) | 2.6 (0.6)a,c | 2.1 (0.7)b,c |
| Masseter* | 3.0 (0.8) | 1.9 (0.6) | 2.0 (0.6)a | 1.9 (0.7)b |
| Temporomandibular Joint* | 3.1 (0.7) | 2.1 (0.7) | 2.2 (0.6)a | 2.0 (0.7)b |
| PPT in Non-facial Region (kg/cm2) | ||||
| Trapezius* | 4.5 (1.2) | 3.7 (1.3) | 4.2 (1.2)c | 3.2 (1.2)b,c |
| Lateral Epicondyle* | 5.2 (1.1) | 4.5 (1.3) | 5.0 (1.1)c | 4.0 (1.2)b,c |
Abbreviations: TMD, temporomandibular disorders; WPT, widespread palpation tenderness; w/o, without; PPT: pressure pain threshold.
Note: Number of study subjects included in each group varies based on available information.
For controls: n=180–181; for TMJD cases: n=151–159 (TMD without WPT: 77~83, TMD with WPT: 71~76)
Controls vs. all TMD cases: p<0.006
a
Controls vs. TMD without WPT: p<0.006
b
Controls vs. TMD with WPT: p<0.006
c
TMD without WPT vs. TMD with WPT: p≤0.006