Table 3. Effect of moderator variables on vertical jump performance.
| Subgroup |
Effect size with 95% confidence interval |
Effect
descriptor |
Groups |
n |
Within-group I2 (%) |
Within-group pa |
Between-group pb |
| ≤8 weeks |
0.787 (0.452 – 1.122) |
Moderate |
8 |
154 |
0.0 |
<0.001 |
0.811 |
| >8 weeks |
0.866 (0.314 – 1.418) |
Moderate |
8 |
192 |
65.6 |
0.002 |
| ≤2 sessions/week |
0.832 (0.398 – 1.266) |
Moderate |
9 |
229 |
57.3 |
<0.001 |
0.866 |
| >2 sessions/week |
0.781 (0.384 – 1.179) |
Moderate |
7 |
117 |
0.0 |
<0.001 |
| ≤16 sessions |
0.730 (0.394 – 1.066) |
Moderate |
7 |
148 |
0.0 |
<0.001 |
0.558 |
| >16 sessions |
0.916 (0.393 – 1.439) |
Moderate |
9 |
198 |
62.2 |
0.001 |
| Female |
1.251 (0.696 – 1.807) |
Large |
6 |
101 |
50.1 |
<0.001 |
0.164 |
| Male |
0.505 (0141 – 0.868) |
Small |
6 |
172 |
0.0 |
0.006 |
| ≥19 years of age |
0.891 (0.362 – 1.421) |
Moderate |
8 |
220 |
59.3 |
0.001 |
0.549 |
| <19 years of age |
0.703 (0.388 – 1.018) |
Moderate |
8 |
102 |
0.0 |
<0.001 |
| >2,000 jumps |
0.761 (0.317 – 1-206) |
Moderate |
5 |
178 |
0.0 |
0.001 |
0.540 |
| <2,000 jumps |
0.785 (0.348 – 1.221) |
Moderate |
9 |
127 |
58.2 |
<0.001 |
a: test of null (2-tail), mixed model;
b: p-value, heterogeneity, total between, mixed model.
