Table 4a Analysis of elbow structural abnormalities of the fielders
Elbow structural abnormalities + | Elbow structural abnormalities - | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
n | Mean | SD | n | Mean | SD | P | Min | Max | 95% Confidence level | ||
Age (years) | 67 | 16.2 | 0.9 | 142 | 16.4 | 0.9 | 0.11 | 13 | 18 | -0.478 | 0.051 |
Official baseball experience (years) | 67 | 7.1 | 2.7 | 142 | 6.5 | 2.2 | 0.12 | 1 | 7 | -0.159 | 1.319 |
Started age (years) | 67 | 9.1 | 2.6 | 142 | 9.9 | 2.1 | 0.30 | 9 | 14 | -1.513 | -0.074 |
Height (cm) | 67 | 172.5 | 5.6 | 142 | 172.2 | 5.8 | 0.67 | 158 | 182 | -1.306 | 2.020 |
BMI (kg/m2) | 67 | 22.8 | 3.2 | 142 | 23.5 | 3.2 | 0.13 | 17.4 | 34.2 | -1.645 | 0.209 |
Shoulder total rotation angle (o) | 66 | 161.0 | 25.2 | 132 | 166.1 | 30.3 | 0.21 | 155 | 180 | -13.600 | 3.411 |
Shoulder ER (o) | 66 | 104.1 | 33.4 | 132 | 103.1 | 32.3 | 0.84 | 80 | 100 | -8.850 | 10.839 |
Shoulder IR (o) | 66 | 57.0 | 32.5 | 132 | 63.1 | 29.2 | 0.20 | 60 | 105 | -15.568 | 3.204 |
Elbow total arm angle (o) | 58 | 135.0 | 7.77 | 123 | 135.8 | 7.0 | 0.50 | 110 | 145 | -3.201 | 1.569 |