Table 5: Stepwise multiple linear regression analyses for the assessment of determinants of CMJ performance.

Model (subjects) R Adj R2 p Predictors’ coefficients
All 0.653 0.409 <0.001 constant = 20.165 sub-catecory = 1.269 PDS = 1.921%BF = -0.183
Giovanissimi 0.489 0.213 <0.001 constant = 22.297 sub-category = 2.236%BF = -0.210
Allievi 0.458 0.184 0.007 constant = 18.229
PDS = 3.848
Juniores 0.236 -0.012 0.383 constant = 33.648%BF = -0.165

Note: % BF = percentage of body fat PDS = pubertal development scale
Sub-category = 3 of Giovanissimi (“A”, “B” and “ C”) and 2 of Allievi (“A” and “B”)