Table 2.
Chi-square (degrees of freedom = 1) and Fisher’s Exact Statistics of Diagnostic Group Differences in Right-Left Symmetry of Muscle Organization*
| Statistical Test |
||||||
|---|---|---|---|---|---|---|
| Frequency |
Chi-square |
|||||
| Biting Position | Group | Symmetry | Asymmetry | Value | p | Fisher’s Exact, p |
| Incisor | Healthy | 16 (89%) | 2 (11%) | 5.26 | 0.022 | 0.025 |
| TMD | 39 (60%) | 26 (40%) | ||||
| Molar | Healthy | 9 (47%) | 10 (53%) | 0.42 | 0.518 | 0.599 |
| TMD | 25 (39%) | 39 (61%) | ||||
*
Participants were grouped into healthy (-P/-DD) and TMD categories (+P/+DD, +P/-DD, -P/+DD). Analyses determined if there were significant differences in symmetry vs. asymmetry of muscle organization between the two study groups for incisor and molar biting.