Test of construct validity. Intergroup proportional difference for examination items included in the clinical examination protocol.
| Examination Item | JIA Group Prevalence, n = 76, % (n, 95% CI) | Control Group Prevalence, n = 91, % (n, 95% CI) | Intergroup Difference, p |
|---|---|---|---|
| Orofacial pain in past 2 weeks | 17 (13, 10.1–27.2) | 7 (6, 0.3–14) | 0.033 |
| TMJ pain on palpation | |||
| Closed mouth | 11 (8, 5.2–19.7)) | 6 (5, 2.0–13.9) | NS |
| Open mouth | 20 (15, 12.2–30.2) | 7 (6, 2.8–13.9) | 0.011 |
| Mandibular deviation*/** | 22 (17, 14.4–33.0) | 4 (4, 1.4–11.1) | 0.001 |
| Maximal mouth opening***, mm, mean (± SD) | 49.0 (± 6.2) | 52.2 (± 5.5) | < 0.001 |
| Frontal facial asymmetry | 65 (49, 53.2–74.3) | 34 (31, 25.1–44.3) | 0.001 |
| Facial profile: moderate convex or micrognathic | 17 (13, 10.1–27.2) | 11 (10, 5.9–19.2) | NS |
| Facial profile: micrognathic** | 7 (5, 2.5–14.8) | 0 (n = 0) | 0.018 |
Maximal mouth opening capacity is presented as continuous data. Frequencies are reported on patient-level.
↵* At maximal mouth opening position.
↵** Fisher’s exact test used because n < 5 subjects in control group.
↵*** Comparison of means with unpaired t test. JIA: juvenile idiopathic arthritis; TMJ: temporomandibular joint.