Table 2.

Summary of second-to-fourth digit ratios (2D:4D) by sex, measurement technique, and participant hand measured. Data are mean (95% confidence interval). 95% confidence intervals for radiograph ratios for men are equal to three decimal places

	Photocopy			Radiograph
	Left hand	Right hand		Left hand	Right hand
Women	0.950 (0.944 to 0.956)	0.960 (0.953 to 0.966)		0.926 (0.920 to 0.932)	0.927 (0.920 to 0.933)
Men	0.940 (0.935 0.945)	0.952 (0.946 to 0.957)		0.916 (0.910 to 0.921)	0.916 (0.910 to 0.921)