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Table 8 Change in sex difference over time for the finalists in the FINA World Championships

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

Sex difference (%)
1994 2013  
50 m freestyle
10.64 ± 0.52   11.69 ± 0.41  
100 m freestyle
9.67 ± 0.54   10.23 ± 0.70  
200 m freestyle
8.77 ± 0.87   9.07 ± .033  
400 m freestyle
8.67 ± 0.73   8.04 ± 0.36  
800 m freestyle
6.16 ± 0.83   7.20 ± 0.65  
1,500 m freestyle
7.68 ± 0.73 (2001) 6.51 ± 0.48  
100 m breaststroke
11.70 ± 0.95   9.83 ± 0.80 *
200 m breaststroke
9.90 ± 0.22   9.50 ± 0.69  
100 m backstroke
9.58 ± 0.69   10.14 ± 0.34 *
200 m backstrocke
9.46 ± 1.23   9.98 ± .060  
100 m butterfly
10.68 ± 0.70   10.54 ± 0.74  
200 m butterfly
9.92 ± 1.48   8.51 ± 0.45 *
200 m individual medley
9.91 ± 0.52   9.98 ± 0.34  
400 m individual medley
9.25 ± 0.28   8.16 ± 0.41  
  1. Note: *p < 0.05.