Table 5 –
Linear Regression Models for Association between Occlusal Status at Baseline and TMJ Intra-Articular Status Separately for Each Joint
| Right TMJ | |||
|---|---|---|---|
| Dependent variable | Independent variable | Coefficient (CI) | P-value |
| #1 – TMJ intra-articular status at baseline | n=338 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.25 (−0.86; 0.36) | .424 |
| SDA left side | 0.12 (−0.43; 0.66) | .673 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.26 (−0.87; 0.35) | .397 |
| SDA left side | 0.00 (−0.56; 0.55) | .992 | |
| Age | 0.01 (0.00; 0.03) | .061 | |
| Gender | 0.08 (−0.38; 0.55) | .723 | |
| #2 – TMJ intra-articular status at follow-up # | n=250 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.41 (−1.02; 0.20) | .183 |
| SDA left side | 0.20 (−0.38; 0.77) | .507 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.33 (−0.94; 0.27) | .280 |
| SDA left side | 0.26 (−0.32; 0.84) | .380 | |
| Age | 0.00 (−0.02; 0.01) | .555 | |
| Gender | 0.52 (0.08; 0.96) | .021 | |
| #3 – TMJ intra-articular status at follow-up (same occlusal status at baseline and follow-up) # |
n=199 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.30 (−1.04; 1.64) | .657 |
| SDA left side | −0.17 (−1.35; 1.00) | .773 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.29 (−1.07; 1.65) | .674 |
| SDA left side | −0.07 (−1.25; 1.10) | .904 | |
| Age | 0.00 (−0.02; 0.01) | .931 | |
| Gender | 0.55 (−0.02; 1.12) | .059 | |
| Left TMJ | |||
| #1 – TMJ intra-articular status at baseline | n=337 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.29 (−0.93; 0.35) | .376 |
| SDA left side | 0.08 (−0.49; 0.65) | .781 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | −0.26 (−0.89; 0.36) | .404 |
| SDA left side | −0.13 (−0.70; 0.43) | .640 | |
| Age | 0.03 (0.01; 0.04) | <.001 | |
| Gender | 0.84 (0.36; 1.32) | .001 | |
| #2 – TMJ intra-articular status at follow-up # | n=232 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.07 (−0.49; 0.63) | .807 |
| SDA left side | 0.23 (−0.30; 0.76) | .397 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.08 (−0.49; 0.65) | .788 |
| SDA left side | 0.24 (−0.30; 0.79) | .382 | |
| Age | 0.00 (−0.01; 0.01) | .784 | |
| Gender | −0.01 (−0.43; 0.40) | .943 | |
| #3 – TMJ intra-articular status at follow-up (same occlusal status at baseline and follow-up) # |
n=182 | ||
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.70 (−0.28; 1.69) | .161 |
| SDA left side | −0.55 (−1.41; 0.31) | .205 | |
| Normal → DDwR → DDw/oR → DJD Grade 1 → DJD Grade 2 | SDA right side | 0.68 (−0.33; 1.69) | .188 |
| SDA left side | −0.56 (−1.43; 0.31) | .205 | |
| Age | 0.00 (−0.01; 0.02) | .779 | |
| Gender | 0.04 (−0.45; 0.53) | .865 | |
#
only subjects without DJD Grade 2 at baseline; statistically controlled for baseline status