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Table 5 Multi-level regression analyses for sex difference in swimming speed of the annual fastest and the annual ten fastest swimmers (Model 1) with correction for multiple finishes (Model 2) and age of the athletes with multiple finishes (Model 3)

From: Analysis of sex differences in open-water ultra-distance swimming performances in the FINA World Cup races in 5 km, 10 km and 25 km from 2000 to 2012

Model ß SE ( ß) Stand. ß T p
   Annual fastest swimmers   
5 km
1 -0.227 0.247 -0.280 -0.921 0.379
2 -0.227 0.247 -0.280 -0.921 0.379
3 -0.419 0.259 -0.515 -1.615 0.141
10 km
1 -0.439 0.204 -0.583 -2.153 0.060
2 -0.439 0.204 -0.583 -2.153 0.060
3 -0.468 0.214 -0.621 -2.183 0.061
25 km
1 0.326 0.294 0.331 1.111 0.293
2 0.326 0.294 0.331 1.111 0.293
3 0.330 0.311 0.336 1.062 0.316
Annual ten fastest swimmers
5 km
1 -0.060 0.081 -0.069 -0.750 0.455
2 -0.060 0.081 -0.069 -0.750 0.455
3 -0.058 0.081 -0.067 -0.718 0.474
10 km
1 -0.430 0.043 -0.690 -9.895 < 0.001
2 -0.430 0.043 -0.690 -9.895 < 0.001
3 -0.432 0.045 -0.693 -9.702 < 0.001
25 km
1 0.269 0.083 0.289 3.264 0.001
2 0.269 0.083 0.289 3.264 0.001
3 0.247 0.082 0.265 3.001 0.003