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Table 2 Multi-level regression analyses for change in performance across years for men and women (Model 1) with correction for multiple finishes (Model 2) and with correction for multiple finishes and age of the participants (Model 3)

From: Swimming performances in long distance open-water events with and without wetsuit

Model β SE (β) Stand. ß T P
Annual fastest men competing with wetsuit
1 −9.425 3.189 −0.702 −2.955 0.016
2 −9.425 3.189 −0.702 −2.955 0.016
3 −9.058 3.376 −0.674 −2.683 0.028
Annual fastest men competing without wetsuit
1 0.764 1.913 0.132 0.399 0.699
2 0.764 1.913 0.132 0.399 0.699
3 0.983 2.243 0.170 0.438 0.673
Annual fastest women competing with wetsuit
1 −9.791 9.556 −0.361 −1.025 0.340
2 −9.791 9.556 −0.361 −1.025 0.340
3 −0.323 −0.935 0.386 −0.357 0.991
Annual fastest women competing without wetsuit
1 −3.065 4.682 −0.213 −0.655 0.529
2 −3.065 4.682 −0.213 −0.655 0.529
3 0.204 0.670 0.522 0.231 0.710
Annual fastest three men competing with wetsuit
1 −8.845 3.109 −0.455 −2.845 0.008
2 −8.845 3.109 −0.455 −2.845 0.008
3 −9.848 2.910 −0.507 −3.385 0.002
Annual fastest three men competing without wetsuit
1 −3.945 2.366 −0.287 −1.668 0.105
2 −3.945 2.366 −0.287 −1.668 0.105
3 −4.117 2.500 −0.299 −1.647 0.110
Annual fastest three women competing with wetsuit
1 −1.762 9.149 −0.061 −0.193 0.851
2 −1.762 9.149 −0.061 −0.193 0.851
3 −3.298 8.674 −0.114 −0.380 0.713
Annual fastest three women competing without wetsuit
1 −7.956 2.994 −0.431 −2.657 0.012
2 −7.956 2.994 −0.431 −2.657 0.012
3 −6.875 3.035 −0.372 −2.265 0.031