TABLE 2.
Demographic characteristics of the study population.
| DIAGNOSTIC GROUP | SAMPLE SIZE | MEAN (SD) AGE, IN YEARS | FEMALE SEX (%) |
|---|---|---|---|
| Healthy Control | 96 | 36.2 (13.2) | 62.5 |
| Nonpainful Temporomandibular Joint (TMJ) Disorder | 116 | 39.9 (13.1) | 76.7 |
| Pain-Related Temporomandibular Disorder (TMD) | 212 | 36.9 (12.6) | 91.0 |
| Headache Without TMD Pain† | 45 | 37.7 (11.7) | 80.0 |
| Odontalgia | 80 | 37.4 (18.3) | 53.8 |
*
Across the primary groups, age did not differ; significant Bartlett’s test for equal variances (χ23 = 18.6, P = .000) was followed by a W test with robust errors (W = 1.81 [3, 213.9], P = .15). Female sex was predominant overall (P = .000) and was allocated unequally across groups (χ23 = 58.2, P = .000). Across the two subsets, age did not differ (F = 0.08 [1, 195], P = .78); female sex was predominant (P = .000) but the proportion was different across the two groups (χ21 = 3.3, P = .07).
†
This group is a subset of the group with nonpainful TMJ disorder and the healthy control group.