Table 4.
Regression equations to predict the BMD of goalkeepers and field players.
| Groups | Prediction equations | C | VIF | R | R2 | SEE | p |
|---|---|---|---|---|---|---|---|
| Goalkeepers | |||||||
| 1 | BMD = 0.802 + 0.030∗PHV + 0.008∗weight | 0.92 | 0.85 | 0.08 | 0.000 | ||
| PHV | 0.24 | 4.23 | |||||
| Weight | 0.24 | 4.23 | |||||
| 2 | BMD = 0.867 + 0.071∗PHV + 0.002∗L. Foot + 0.037∗D. Humerus | 0.93 | 0.86 | 0.08 | 0.000 | ||
| PHV | 0.21 | 4.8 | |||||
| Length of the foot (cm) | 0.28 | 3.57 | |||||
| Diameter of the humerus | 0.27 | 3.72 | |||||
| 3 | DMO = 1.088 + 0.052∗PHV + 0.006∗Weight-0.016∗L. Foot + 0.017∗D. Humerus | 0.95 | 0.90 | 0.07 | 0.000 | ||
| PHV | 0.17 | 5.97 | |||||
| Weight | 0.19 | 5.20 | |||||
| Length of the foot (cm) | 0.25 | 4.02 | |||||
| Diameter of the humerus | 0.26 | 3.89 | |||||
| Field player | |||||||
| 1 | BMD = 0.712 + 0.030∗PHV + 0.008∗Weight | 0.85 | 0.73 | 0.10 | 0.000 | ||
| PHV | 0.22 | 4.61 | |||||
| Weight | 0.22 | 4.61 | |||||
| 2 | BMD = 0.495 + 0.057∗PHV + 0,017∗L. Foot + 0.036∗D. Humerus | 0.83 | 0.69 | 0.11 | 0.000 | ||
| PHV | 0.37 | 2.7 | |||||
| Length of the foot (cm) | 0.42 | 2.39 | |||||
| Diameter of the humerus | 0.40 | 2.48 | |||||
| 3 | BMD = 0.856 + 0,028∗PHV + 0.009∗Weight-0.011∗L. Foot + 0.010∗D. Humerus | 0.86 | 0.73 | 0.10 | 0.000 | ||
| PHV | 0.21 | 4.78 | |||||
| Weight | 0.11 | 8.95 | |||||
| Length of the foot (cm) | 0.27 | 3.77 | |||||
| Diameter of the humerus | 0.37 | 2.71 | |||||
C, collinearity; VIF, variation inflation factor; SEE, standard error of estimate; PHV, peak height velocity; L. Foot, length of the foot; D. Humerus, diameter of the humerus; BMD, bone mineral density.