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Table 4 Multi-level regression analyses for the changes in sex differences across years for the annual fastest and the annual ten fastest runners (Model 1) and with correction for multiple finishes (Model 2)

From: Will women outrun men in ultra-marathon road races from 50 km to 1,000 km?

Distance (km) Model β SE ( β) Stand. β T P
Annual fastest athletes
50 1 -0.545 0.124 -0.620 -4.396 < 0.0001
2 -0.545 0.124 -0.620 -4.396 < 0.0001
100 1 -0.652 0.076 -0.789 -8.526 < 0.0001
2 -0.652 0.076 -0.789 -8.526 < 0.0001
200 1 0.439 0.254 0.576 1.724 0.135
2 0.439 0.254 0.576 1.724 0.135
1,000 1 0.493 0.386 0.463 1.278 0.249
2 0.493 0.386 0.463 1.278 0.249
Annual ten fastest athletes
50 1 -0.293 0.041 -0.416 -7.199 < 0.0001
2 -0.293 0.041 -0.416 -7.199 < 0.0001
100 1 -0.526 0.027 -0.714 -19.295 < 0.0001
2 -0.526 0.027 -0.714 -19.295 < 0.0001