Table 1
Number of measurements and number of players per age group and maturity status.
Longitudinal data set
Number of measurements
Control group
(1-measurement)
Age
Maturity status
3
4
5
Total measurements
11 years
Late
0
4
2
6
2
On Time
3
7
13
23
4
Early
0
2
9
11
2
Total
3
13
24
40
8
12 years
Late
0
4
5
9
2
On Time
3
12
18
33
4
Early
1
2
12
15
3
Total
4
18
35
57
9
13 years
Late
1
5
5
11
2
On Time
7
17
24
48
5
Early
3
5
16
24
3
Total
11
27
45
83
10
14 years
Late
1
5
5
11
1
On Time
4
17
24
45
6
Early
3
5
16
24
3
Total
8
27
45
80
10
15 years
Late
1
1
5
7
1
On Time
4
10
24
38
6
Early
2
3
16
21
1
Total
7
14
45
66
8
16 years
Late
0
1
3
4
0
On Time
0
5
11
16
3
Early
0
3
7
10
1
Total
0
9
21
30
4
17 years
Late
0
0
0
0
0
On Time
0
0
6
6
2
Early
0
0
4
4
1
Total
0
0
10
10
3
Number of measurements
33
108
225
366
52
Number of players
11
27
45
83
52
Late
1
5
5
11
8
On Time
7
17
24
48
30
Early
3
5
16
24
14