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: Q1-Q4: first quarter to fourth quarter; p < 0.05: significant differences compared with licensed players