Table 8.

Coefficients and standard errors from multivariate regression models for sex differences of the annual ten fastest runners for each calendar year

	C	SE	P-value
Intercept	638.63	48.71	<0.0001
Year	−0.31	0.024	<0.0001
Distance
100 miles	0.960	0.500	0.0056
Age
Linear	−0.0190	0.0620	0.750
Squared	−0.0042	0.0092	0.642
Interaction distance × age linear
100 miles × age	0.0027	0.083	0.974
Interaction distance × age2
100 miles × age2	0.0092	0.011	0.427

Abbreviations: C, coefficient; SE, standard error.