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Table 11 Change in sex difference over time for the finalists in the Olympic Games

From: Changes in sex difference in swimming speed in finalists at FINA World Championships and the Olympic Games from 1992 to 2013

Sex difference (%)
1992 2012
  50 m freestyle  
11.72 ± 0.39 11.31 ± 0.23   
  100 m freestyle  
10.59 ± 0.57 10.60 ± 0.21   
  200 m freestyle  
9.80 ± 0.31 9.17 ± 0.34   
  400 m freestyle  
9.43 ± 0.41 7.63 ± 0.61   *
  800 m freestyle  
6.53 ± 0.51 5.84 ± 0.30   *
  100 m breaststroke  
10.97 ± 0.97 10.51 ± 0.36   
  200 m breaststroke  
10.83 ± 0.32 9.71 ± 0.79   
  100 m backstroke  
10.82 ± 0.47 10.10 ± 0.50   *
  200 m backstroke  
8.85 ± 1.05 9.11 ± 0.53   
  100 m butterfly  
9.70 ± 0.84 9.49 ± 0.42   
  200 m butterfly  
9.13 ± 0.80 9.44 ± 0.35   *
  200 m individual medley  
9.83 ± 1.02 10.04 ± 0.61   
  400 m individual medley  
8.88 ± 1.0 8.26 ± 0.47   
  1. Note: *p < 0.05.