Table 3.
Effect of Pitching Kinematic Variables on Dynamic Ultrasound Measurements
| Preseason Pitching Variable | Postseason UCL Thickness |
Change in UCL Thickness |
Postseason UHJS Loaded |
Change in UHJS Loaded |
||||
|---|---|---|---|---|---|---|---|---|
| Est (SE) | P Value | Est (SE) | P Value | Est (SE) | P Value | Est (SE) | P Value | |
| Elbow torque | 0.005 (0.01) | .606 | 0.0004 (0.01) | .965 | –0.03 (0.01) | .042 | –0.03 (0.01) | .045 |
| Arm slot | –0.016 (0.01) | .156 | –0.03 (0.01) | .011 | 0.004 (0.03) | .912 | 0.01 (0.03) | .667 |
| Arm speed | 0.0004 (0.002) | .847 | –0.001 (0.002) | .565 | –0.003 (0.005) | .637 | –0.001 (0.006) | .877 |
| Arm rotation | –0.01 (0.01) | .371 | –0.001 (0.01) | .991 | –0.02 (0.03) | .523 | –0.03 (0.03) | .283 |
| Ball velocity | –0.012 (0.04) | .745 | –0.008 (0.03) | .787 | 0.09 (0.10) | .368 | 0.13 (0.10) | .218 |
NOTE. Univariate relationships for continuous variables are presented as beta estimate (standard error). Interpretation for beta estimates is as follows: for every 1-unit increase in a pitching kinematic measurement, the ultrasound measurement changes by the magnitude of the beta estimate (i.e., for every 1-degree reduction in preseason arm slot, the change in UCL thickness from preseason to postseason in the cohort of players increased by 0.03 mm (0.01) significantly).
Statistically significant P values are indicated in bold (P < .05).
UCL, ulnar collateral ligament; UHJS, ulnohumeral joint space.