Table 3. Hormone-related breast cancer risk factors and 2D : 4D measuresa.
|
Age at menarche
|
Age at menopause
|
|||||
|---|---|---|---|---|---|---|
| Mean difference | 95% CI | P | Mean difference | 95% CI | P | |
| Left hand | −0.02 | (−0.05, 0.01) | 0.24 | −0.06 | (−0.22, 0.09) | 0.40 |
| Right hand | −0.03 | (−0.06, 0.01) | 0.12 | −0.25 | (−0.41, −0.10) | 0.001 |
| Δr−l | −0.01 | (−0.04, 0.03) | 0.64 | −0.16 | (−0.31, −0.01) | 0.04 |
a
Results estimated by linear regression models of age at menarche and age at menopause on standardised 2D : 4D measures, adjusting for country of birth. Coefficients represent the mean difference in years for a 1-s.d. increase in the 2D : 4D measure. P-values are from likelihood ratio tests of the regression coefficients.