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Table 11 Results of the mixed-effects regression analyses for change in age across years in marathoners

From: Male and female Ethiopian and Kenyan runners are the fastest and the youngest in both half and full marathon

Parameter Estimate SE DF T p value
Ethiopia      
 Constant term 129.282320 508.886678 16.700 0.254 0.803
 Female sex −0.243651 3.310608 12.319 −0.074 0.943
 Calendar year −0.050632 0.253416 16.702 −0.200 0.844
Kenya      
 Constant term −112.654090 528.060345 30.357 −0.213 0.832
 Female sex 3.707084 4.569460 13.457 0.811 0.431
 Calendar year 0.070957 0.263161 30.291 0.270 0.789
Austria      
 Constant term 203.368427 202.655612 491.365 1.004 0.316
 Female sex −2.565643 1.122330 309.176 −2.286 0.023
 Calendar year −0.079728 0.100942 491.362 −0.790 0.430
France      
 Constant term 118.121641 83.994410 2805.626 1.406 0.160
 Female sex 0.044112 0.552283 1850.356 0.080 0.936
 Calendar year −0.037087 0.041835 2805.619 −0.887 0.375
Great Britain
 Constant term 389.692562 249.759353 477.933 1.560 0.119
 Female sex −1.714608 1.280914 348.174 −1.339 0.182
 Calendar year −0.173769 0.124396 477.931 −1.397 0.163
Germany      
 Constant term 107.789331 82.298718 3899.573 1.310 0.190
 Female sex 0.535367 0.472119 2458.948 1.134 0.257
 Calendar year −0.032069 0.040991 3899.516 −0.782 0.434
Italy      
 Constant term 556.010922 261.000704 423.965 2.130 0.034
 Female sex 1.394311 1.647994 289.562 0.846 0.398
 Calendar year −0.255065 0.129966 423.965 −1.963 0.050
Japan      
 Constant term −933.316248 562.194049 154.231 −1.660 0.099
 Female sex 1.996612 3.315609 104.626 0.602 0.548
 Calendar year 0.488912 0.279931 154.230 1.747 0.083
Switzerland      
 Constant term 37.165305 28.161538 39,125.737 1.320 0.187
 Female sex 0.130342 0.144640 24,925.454 0.901 0.368
 Calendar year 0.002333 0.014026 39,122.296 0.166 0.868
Canada      
 Constant term −113.393911 476.054030 132.791 −0.238 0.812
 Female sex −2.046769 3.297757 73.295 −0.621 0.537
 Calendar year 0.077849 0.237227 132.790 0.328 0.743
Liechtenstein
 Constant term 1182.645518 516.645857 102.882 2.289 0.024
 Female sex 2.754826 2.269941 72.517 1.214 0.229
 Calendar year −0.569271 0.257412 102.881 −2.212 0.029
United States of America
 Constant term 237.925017 383.185261 297.972 0.621 0.535
 Female sex −1.592948 2.308567 180.960 −0.690 0.491
 Calendar year −0.098054 0.190859 297.985 −0.514 0.608
Belgium
 Constant term −304.145888 500.299320 132.133 −0.608 0.544
 Female sex 1.923155 3.303639 100.875 0.582 0.562
 Calendar year 0.172307 0.248996 132.127 0.692 0.490
Spain      
 Constant term 519.395530 568.357363 74.188 0.914 0.364
 Female sex −0.202724 2.587542 60.661 −0.078 0.938
 Calendar year −0.237530 0.282985 74.188 −0.839 0.404
Poland
 Constant term −2195.393095 875.131990 54.937 −2.509 0.015
 Female sex −3.631775 3.857273 56.539 −0.942 0.350
 Calendar year 1.113417 0.435743 54.943 2.555 0.013
  1. Data for Non-African runners are sorted in order of the number of finishers of each country