Table 2.
Season of birth distribution of young male tennis players and the corresponding German population.
Age group
Status
Q1 (%)
Q2 (%)
Q3 (%)
Q4 (%)
n
p
U12
National selection
6 (54.6)
2 (18.2)
0 (0.0)
3 (27.3)
11
Regional selection
38 (41.9)
22 (26.9)
20 (22.9)
9 (8.3)
89
.001
Ranked players
501 (30.0)
444 (26.5)
417 (24.5)
325 (19.0)
1687
.000
Listed players
5987 (25.2)
6110 (25.7)
6354 (26.7)
5364 (22.5)
23815
German population
196281 (24.9)
196644 (24.9)
210187 (26.6)
186507 (23.6)
805940
U14
National selection
11 (44.0)
5 (20.0)
6 (24.0)
3 (12.0)
25
Regional selection
52 (38.5)
36 (26.9)
32 (22.6)
16 (12.0)
136
.001
Ranked players
694 (32.5)
507 (23.5)
530 (24.6)
424 (19.5)
2155
.000
Listed players
7974 (25.0)
7916 (25.0)
8530 (26.7)
7519 (23.6)
31939
German population
202693 (24.7)
204780 (25.0)
219002 (26.7)
193396 (23.6)
801381
U16
National selection
5 (35.7)
7 (50.0)
1 (7.1)
1 (7.1)
14
Regional selection
34 (36.3)
25 (26.2)
19 (20.0)
16 (17.3)
94
.016
Ranked players
495 (28.0)
436 (24.7)
441 (24.9)
397 (22.4)
1769
.000
Listed players
7987 (23.8)
8158 (24.3)
8999 (26.8)
8456 (25.2)
33600
German population
193793 (24.2)
193239 (24.1)
215388 (26.9)
198961 (24.8)
819871
U18
National selection
2 (28.6)
2 (28.6)
1 (14.3)
2 (28.6)
7
Regional selection
21 (34.1)
20 (34.6)
13 (19.3)
8 (12.0)
62
.031
Ranked players
429 (27.6)
389 (25.0)
388 (24.9)
348 (22.4)
1554
.001
Listed players
7454 (23.7)
7620 (24.2)
8580 (27.2)
7843 (24.9)
31497
German population
201252 (25.0)
202051 (25.1)
212213 (26.3)
190424 (23.6)
789619
All age groups pooled together
National selection
24 (42.1)
16 (28.1)
8 (14.0)
9 (15.8)
57
.011
Regional selection
145 (38.1)
103 (27.0)
84 (22.1)
49 (12.9)
381
.000
Ranked players
2119 (29.6)
1776 (24.8)
1776 (24.8)
1494 (20.9)
7165
.000
Listed players
29402 (24.3)
29804 (24.7)
32463 (26.9)
29182 (24.2)
120851
German population
794019 (24.7)
796714 (24.8)
856790 (26.6)
769288 (23.9)
3216811
U12-U18: under 12 to under 18: Q
1
-Q
4
: first quarter to fourth quarter; p < 0.05: significant differences compared with licensed players