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
