Table 2.

Mean values of 2D : 4D measured by the direct and indirect methods in males and females.

Variable	Males (n = 276) (mean ± SD)	Female (n = 284) (mean ± SD)	Effect of size	Sex difference (P-value)	df
Right 2D : 4D
Direct	0.98 ± 0.04	0.98 ± 0.04	0.00	0.003 (0.443)	558
Indirect	0.96 ± 0.03	0.976 ± 0.037	−0.67	0.021 (0.000)*	558
Method difference (P-value)	0.028 (0.000)*	0.003 (0.256)	–
Left 2D : 4D
Direct	0.97 ± 0.04	0.99 ± 0.04	−0.5	0.017 (0.000)*	558
Indirect	0.96 ± 0.04	0.97 ± 0.04	−0.25	0.011 (0.000)*	558
Method difference (P-value)	0.013 (0.000)*	0.020 (0.000)*	–

2D : 4D, 2nd to 4th finger ratio; df, degrees of freedom.

^*P-value ≤ 0.05.