Table 2.
Pain Chronicity, Number of Painful Muscle Sites, and PPTs by Site for the MFPwR (Group 1), Mw/oR (Group 2), and Non-TMD Control (Group 3) Groups
| Measure | Group 1 (n = 196) | Group 2 (n = 299) | Group 3(n = 87) | P value for differences among groups | P value for pairwise comparisons between groups |
|---|---|---|---|---|---|
| Pain chronicity, y | 10.1 (9.2) | 7.9 (8.3) | 0 | .008* | 1 vs 2: .009* |
| No. of painful muscle sites (0–20) | 10.3 (0.5) | 6.2 (0.4) | 0 | < .0001* | 1 vs 2: < .0001* 1 vs 3: < .0001* 2 vs 3: < .0001* |
| PPT for masseter muscle, kPa | 147 (5.3) | 159 (4.6) | 209 (6.0) | < .0001* | 1 vs 2: .005* 1 vs 3: < .0001* 2 vs 3: < .0001* |
| PPT for temporalis muscle, kPa | 182 (6.6) | 196 (5.7) | 248 (7.4) | < .0001* | 1 vs 2: .008* 1 vs 3: < .0001* 2 vs 3: < .0001* |
| PPT for frontalis muscle, kPa | 211 (6.8) | 223 (5.9) | 279 (7.6) | < .0001* | 1 vs 2: .03 1 vs 3: < .0001* 2 vs 3: < .0001* |
| PPT for lateral palm, kPa | 405 (13.0) | 410 (11.1) | 497 (14.5) | < .0001* | 1 vs 2: .64 1 vs 3: < .0001* 2 vs 3: < .0001* |
All data are reported as mean (SE). *Statistically significant. The thresholds of statistical significance were P < .05 for differences among groups and P < .017 for pairwise comparisons.