Table 3. Correlation between mouth opening limitation and each of the magnetic resonance imaging findings (univariate analysis).
| Category | Mouth opening limitation | Total (n=96) | χ2 | P-value | |
|---|---|---|---|---|---|
| No (n=49) | Yes (n=47) | ||||
| Functional aspect of disc displacement | 19.79 | <0.001 | |||
| Absent | 14 (28.6) | 11 (23.4) | 25 (26.0) | ||
| ADDWR | 28 (57.1) | 10 (21.3) | 38 (39.6) | ||
| ADDWOR | 7 (14.3) | 26 (55.3) | 33 (34.4) | ||
| Degree of disc displacement | 8.29 | 0.02 | |||
| Normal | 14 (28.6) | 11 (23.4) | 25 (26.0) | ||
| Slight to mild | 18 (36.7) | 7 (14.9) | 25 (26.0) | ||
| Moderate to significant | 17 (34.7) | 29 (61.7) | 46 (47.9) | ||
| Joint effusion | 0.14 | 0.71 | |||
| Absent | 42 (85.7) | 39 (83.0) | 81 (84.4) | ||
| Present | 7 (14.3) | 8 (17.0) | 15 (15.6) | ||
| Disc deformities | 0.01 | 0.91 | |||
| Absent | 13 (26.5) | 12 (25.5) | 25 (26.0) | ||
| Present | 36 (73.5) | 35 (74.5) | 71 (74.0) | ||
| Osteoarthritis | 1.72 | 0.19 | |||
| Absent | 40 (81.6) | 33 (70.2) | 73 (76.0) | ||
| Present | 9 (18.4) | 14 (29.8) | 23 (24.0) | ||
(ADDWR: anterior disc displacement with reduction, ADDWOR: anterior disc displacement without reduction)
Values are presented as number (%).
The sum of the percentages does not equal 100% because of rounding.