Skip to main content

Table 2 Multiple linear regression analysis of swimming performance, i.e. FINA points, as dependent variable and competition (comp.) [years] age, relative age [month of birth], and chronological (chronol.) [years] age as predictors with standardized (beta_i) and unstandardized (b_i) regression coefficients in male swimmers

From: Competition age: does it matter for swimmers?

Regression model   Regression coefficients
n R2 F p   beta_i b_i t_i p
All events Comp. age 0.34 24.6 74 < 0.001
39,487 0.25 F(3|39483) = 4326  < 0.001 Relative age 0.08 4.2 18 < 0.001
     Chronol. age 0.24 7.0 52 < 0.001
Butterfly Comp. age 0.24 14.3 54 < 0.001
42,926 0.29 F(3|42922) = 5897  < 0.001 Relative age 0.03 1.6 8 < 0.001
     Chronol. age 0.39 13.0 86 < 0.001
Backstroke Comp. age 0.24 15.5 39 < 0.001
23,603 0.36 F(3|23599) = 4400  < 0.001 Relative age 0.04 1.8 7 < 0.001
     Chronol. age 0.44 16.7 72 < 0.001
Breaststroke Comp. age 0.28 17.5 46 < 0.001
22,258 0.34 F(3|22254) = 3878  < 0.001 Relative age 0.04 1.8 7 < 0.001
     Chronol. age 0.40 13.4 66 < 0.001
Freestyle Comp. age 0.33 22.0 69 < 0.001
34,759 0.32 F(3|34755) = 5502  < 0.001 Relative age 0.05 2.5 11 < 0.001
     Chronol. age 0.34 10.9 70 < 0.001
Individual medley Comp. age 0.14 7.7 18 < 0.001
16,070 0.33 F(3|16066) = 2635  < 0.001 Relative age 0.04 1.8 6 < 0.001
     Chronol. age 0.48 20.4 63 < 0.001
50 m Freestyle Comp. age 0.33 19.7 85 < 0.001
52,043 0.30 F(3|52039) = 7304  < 0.001 Relative age 0.03 1.5 9 < 0.001
     Chronol. age 0.32 8.1 82 < 0.001
100 m Freestyle Comp. age 0.24 15.6 45 < 0.001
28,309 0.40 F(3|28305) = 6390  < 0.001 Relative age 0.02 0.9 4 < 0.001
     Chronol. age 0.48 20.0 89 < 0.001
200 m Freestyle Comp. age 0.21 12.6 32 < 0.001
20,225 0.33 F(3|20221) = 3279  < 0.001 Relative age 0.03 1.5 6 < 0.001
     Chronol. age 0.43 18.3 65 < 0.001
400 m Freestyle Comp. age 0.26 15.0 31 < 0.001
14,005 0.11 F(3|14001) = 570  < 0.001 Relative age 0.09 4.0 11 < 0.001
     Chronol. age 0.11 3.3 14 < 0.001
800 m Freestyle Comp. age 0.23 11.8 20 < 0.001
7695 0.07 F(3|7691) = 195  < 0.001 Relative age 0.11 4.8 10 < 0.001
     Chronol. age − 0.12 − 2.4 − 11 < 0.001
1500 m Freestyle Comp. age 0.22 11.5 17 < 0.001
5466 0.07 F(3|5462) = 130  < 0.001 Relative age 0.11 4.8 9 < 0.001
     Chronol. age − 0.10 − 2.3 − 7 < 0.001