Table 1.
Demographic and Baseline Differences between Validation Project and TMJ Impact Project Subjects.
| Variable/Scale | Validation Project, n = 323 | Validation and TMJ Impact Projects, n = 401 | P Valuea | TMJ Impact Project at Follow-up, n = 401 |
|---|---|---|---|---|
| Age, y | 36.1 ± 13.2 | 37.4 ± 12.9 | 0.19 | 45.8 ± 12.9 |
| Sex | ||||
| Male | 61 (19) | 68 (17) | 0.50 | 68 (17) |
| Female | 262 (81) | 333 (83) | 333 (83) | |
| Education, y | ||||
| ≤12 | 52 (16.1) | 62 (15.5) | 0.83 | 27 (6.75) |
| >12 | 271 (83.9) | 338 (84.5) | 373 (93.25) | |
| Income | ||||
| <$40,000/y | 161 (50.31) | 189 (47.73) | 0.49 | 88 (26.19) |
| ≥$40,000/y | 159 (49.69) | 207 (52.27) | 248 (73.81) | |
| Jaw Functional Limitation Scale | 1.50 ± 1.50 | 1.19 ± 1.38 | 0.004 | 0.73 ± 1.01 |
| Graded Chronic Pain Scale | ||||
| Characteristic Pain Intensity | 40.3 ± 28.3 | 34.7 ± 28.3 | 0.009 | 21.3 ± 21.1 |
| Disability Points | 2.50 ± 1.66 | 2.23 ± 1.73 | 0.034 | 1.62 ± 1.55 |
| Distribution of cases and controls | ||||
| Clinic cases | 78 (24.1) | 78 (19.5) | 0.27 | |
| Community cases | 208 (64.4) | 269 (67.0) | ||
| Community controls | 37 (11.5) | 54 (13.5) |
Values presented as n (%) or mean ± SD.
TMJ, temporomandibular joint.
a
For baseline difference.