Table 2. Regression of half-marathon time in seconds on digit ratio (right in model 1, left in model 2), sex and sex-ratio interaction (right in model 1, left in model 2).

Step	Predictor	β	t	p
	Model 1
1	Age	-.057	-1.317	.188
Δ R2 = .003, F Change (1,540) = 1.736, p = .188
2	Age	-.007	-.186	.853
	Sex Code	-2.692	-2.058	.040
	Right Interaction	2.725	2.104	.036
	Right ratio	.249	2.410	.016
Δ R2 = .203, F Change (3,537) = 45.692, p < .001
Model summary: F(4,537) = 34.810, p < 0.001, R2 = .206
	Model 2
1	Age	-.057	-1.317	.188
Δ R2 = .003, F Change (1,540) = 1.736, p = .188
2	Age	-.030	-.734	.463
	Sex Code	-2.419	-2.174	.030
	Left Interaction	2.561	2.427	.016
	Left ratio	.248	2.201	.028
Δ R2 = .172, F Change (3,537) = 37.239, p < .001
Model summary: F(4,537) = 28.451, p < 0.001, R2 = .175