Table 2. Descriptive and inferential statistics for developmental stages variables.
Developmental stages Roller-hockey Volleyball Soccer Basketball
IN OR SP HP IN OR SP HP IN OR SP HP IN OR SP HP
Number of sports practiced
0
1
2
3
≥4		 -
52.6
21.1
21.1
5.3		 -
63.2
21.1
10.5
5.3		 -
78.9
10.5
5.3
5.3		 -
94.7
5.3
-
-		 8.6
42.9
7.1
14.3
7.1		 14.3
50.0
21.4
14.3
-		 7.1
92.9
-
-
-		 -
100
-
-
-		 9.5
54.7
33.3
2.4
-		 -
90.5
9.5
-
-		 -
97.6
2.4
-
-		 -
100
-
-
-		 18.2
31.2
28.6
16.9
5.2		 3.9
71.4
23.4
1.3
-		 -
98.7
1.3
-
-		 -
100

-
-
Type of sports practiced
None
Main team sport
Other team sports (TS)
Individual sports (Individual)
Combinations of several sports		 -
52.6
-
-
47.4		 -
63.2
-
-
36.9		 -
78.9
-
-
21.0		 -
94.7
-
-
5.3		 28.6
21.4
28.6
-
21.3		 14.3
50.0
21.4
-
14.3		 7.1
92.9
-
-
-		 -
100
-
-
-		 9.5
54.7
-
-
35.7		 -
88.1
-
-
14.4		 -
97.6
-
-
2.4		 -
100
-
-
-		 18.2
13.0
14.3
9.1
45.5		 3.9
66.2
5.2
1.3
23.4		 -
98.7
-
-
1.3		 -
100
-
-
-
Average minutes per week
None
60 minutes
60-120 minutes
120-180 minutes
180-240 minutes
240-300 minutes
300 minutes		 -
-
-
-
26.3
26.3
47.4		 -
-
-
-
-
31.6
68.4		 -
-
-
-
-
10.5
89.5		 -
-
-
-
-
-
100		 28.6
-
7.1
-
42.9
14.3
7.1		 14.3
-
-
-
28.6
35.7
21.4		 7.1
-
-
-
7.1
28.6
57.1		 -
-
-
-
-
-
100		 9.5
-
2.4
11.9
9.5
26.2
40.5		 -
-
2.4
-
7.1
16.7
73.8		 -
-
-
-
4.8
-
95.2		 -
-
-
-
2.4
-
97.6		 18.2
1.3
2.6
10.4
18.2
11.7
37.7		 3.9
-
-
1.3
3.9
16.9
74.0		 -
-
1.3
-
-
2.6
96.1		 -
-
-
-
-
-
100
Participation in competition
None
Yes
No		 -
100
-		 -
100
-		 -
100
-		 -
100
-		 28.6
64.3
7.1		 14.3
85.7
-		 7.1
92.9
-		 -
100
-		 9.5
90.5
-		 -
97.6
2.4		 -
100
-		 -
100
-		 18.2
62.3
19.5		 3.9
96.1
-		 -
98.7
1.3		 -
100
-
All statistical significant differences are described in the results section.