Table 7 Age comparison of East Asian football players playing in Europe via different routes.

From: East Asian expatriate football players and national team success: Chinese, Japanese, and South Korean players in Europe (2000–2024)

Group 1

Group 2

t-test/Welch’s t-test/Kruskal—Wallis H

p-value

Adjusted p-value

Effect Size

  

Route A1: Average age and median age of East Asian players when first joining non-Big Five

  

China 22.60 and 22.00, Japan 21.54 and 21.5, South Korea 20.81 and 20.5

China

Japan

0.6527

0.5191

1.5572

0.3187

China

South Korea

1.0035

0.3282

0.9846

0.5142

Japan

South Korea

0.7826

0.4385

1.3154

0.2487

  

Route A2: Average age and median age of East Asian players when first moving from non-Big Five to the Big Five

  

China 23.80 and 23.00, Japan 24.65 and 24.5, South Korea 23.44 and 23.5

China

Japan

-0.4602

0.6488

1.9465

-0.2247

China

South Korea

0.1717

0.8655

2.5965

0.0880

Japan

South Korea

0.9952

0.3256

0.9769

0.3162

  

Route B: Average age and median age of East Asian players when directly joining Big Five for the first time

  

China 24.62 and 24.00, Japan 23.03 and 23.00, South Korea 22.31 and 22.00

China

Japan

1.3689

0.2420

0.7260

0.0207

China

South Korea

2.7959

0.0945

0.2835

0.0717

Japan

South Korea

1.2482

0.2639

0.7917

0.0139

  

Route C: Average age and median age of East Asian players when first directly joining non-Big Five without later joining the Big Five

  

China 21.59 and 21.00, Japan 23.21 and 23.00, South Korea 22.51 and 22.00

China

Japan

-2.7516

0.0066

0.0197

-0.5106

China

South Korea

1.0910

0.2962

0.8887

0.0128

Japan

South Korea

3.4769

0.0622

0.1867

0.0190

The number of players observed

China 50, Japan 220, South Korea 97

  1. (unit: years).