highly significantP = 0.005
The baseline group included all low-birthweight girls without distinction by height at age 7 because of small numbers. The effect of this three-category factor on breast cancer rates was highly significant (P = 0.005).
The baseline group included all low-birthweight girls without distinction by height at age 7 because of small numbers. The effect of this three-category factor on breast cancer rates was highly significant (P = 0.005).
There is also a borderline significant inter- action between birthweight and age at menarche (P = 0.05), with a stronger effect of birthweight in girls with earlier puberty.