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Table 6 Multi-level regression analyses for change in running speed across years for the annual fastest male and female runners after correction for multiple finishes and age of athletes with multiple finishes

From: Will the age of peak ultra-marathon performance increase with increasing race duration?

  ß SE (ß) Stand. ß T p
Annual fastest men
6 hrs 0.018 0.016 0.183 1.095 0.285
12 hrs 0.027 0.018 0.272 1.445 0.161
24 hrs 0.075 0.013 0.747 5.891 <0.0001 *
48 hrs 0.013 0.012 0.193 1.036 0.310
72 hrs 0.126 0.023 0.712 5.443 <0.0001 *
6 d -0.020 0.011 -0.316 -1.767 0.088
10 d 0.001 0.037 0.009 0.030 0.977
Annual fastest women
6 hrs 0.129 0.026 0.730 4.959 <0.0001 *
12 hrs 0.075 0.015 0.722 4.866 <0.0001 *
24 hrs 0.099 0.027 0.578 3.739 0.001 *
48 hrs 0.074 0.021 0.604 3.628 0.001 *
72 hrs 0.058 0.031 0.386 1.872 0.081
6 d 0-.013 0.016 -0.212 -0.818 0.421
10 d 0.104 0.017 0.883 6.248 <0.0001 *
  1. * = significantly different.