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Table 5 Multi-level regression analyses for change in overall race times cross years with correction for multiple finishes for the annual three fastest women and men

From: Performance and sex difference in ultra-triathlon performance from Ironman to Double Deca Iron ultra-triathlon between 1978 and 2013

Distance Sex ß SE (ß) Stand. ß T P
Ironman Female −3.031 0.345 −0.665 −8.781 < 0.001
Double Iron Female 3.404 2.436 0.172 1.398 0.167
Triple Iron Female 31.511 4.612 0.678 6.833 < 0.001
Quintuple Iron Female −214.111 223.258 −0.432 −0.959 0.392
Ironman Male −3.646 0.419 −0.645 −8.696 < 0.001
Double Iron Male −5.999 1.110 −0.506 −5.406 < 0.001
Triple Iron Male −6.678 2.479 −0.295 −2.694 0.009
Quadruple Iron Male −87.100 45.689 −0.516 −1.906 0.086
Quintuple Iron Male 84.992 29.276 0.627 2.903 0.012
Deca Iron Male 7.978 30.303 0.050 0.263 0.794