Table 3 Number of players divided into quartiles in each sport
From: Relative Age Effects in Male Japanese Professional Athletes: a 25-Year Historical Analysis
Year | Q1 | Q2 | Q3 | Q4 | Total | χ2 | Phi | |
|---|---|---|---|---|---|---|---|---|
Soccer | 1993 | 129 (36.5%) | 108 (30.6%) | 57 (16.1%) | 59 (16.7%) | 353 | ||
2001 | 277 | 233 | 153 | 109 | 772 | 9.50* | 0.111 | |
[Expected] | 282 | 236 | 125 | 129 | 772 | |||
2010 | 331 | 273 | 212 | 139 | 955 | 25.64** | 0.164 | |
[Expected] | 349 | 292 | 155 | 159 | 955 | |||
2018 | 467 | 422 | 294 | 227 | 1410 | 24.11** | 0.131 | |
[Expected] | 515 | 431 | 228 | 236 | 1410 | |||
Baseball | 1993 | 279 (34.7%) | 262 (32.6%) | 142 (17.7%) | 120 (14.9%) | 803 | ||
2001 | 264 | 224 | 141 | 102 | 731 | 2.92 | 0.063 | |
[Expected] | 254 | 238 | 129 | 110 | 731 | |||
2010 | 240 | 212 | 175 | 104 | 731 | 20.34** | 0.167 | |
[Expected] | 254 | 238 | 129 | 110 | 731 | |||
2018 | 258 | 236 | 181 | 156 | 831 | 23.20** | 0.167 | |
[Expected] | 288 | 271 | 147 | 125 | 831 | |||
Basketball | 2010 | 48 (30.4%) | 44 (27.8%) | 35 (22.2%) | 31 (19.6%) | 158 | ||
2018 | 137 | 124 | 84 | 83 | 428 | 1.87 | 0.066 | |
[Expected] | 130 | 119 | 95 | 84 | 428 | |||
Volleyball | 2010 | 39 (29.3%) | 43 (32.3%) | 28 (21.1%) | 23 (17.3%) | |||
2018 | 141 | 123 | 130 | 106 | 500 | 20.24** | 0.201 | |
[Expected] | 147 | 162 | 105 | 86 | 500 |