borderline significancep = 0.071
In terms of menstrual and reproductive history and use of exogenous sex hormones, lead levels were higher among women who were already in menopause at enrolment ( p < 0.001) and, with borderline significance, those with a late menarche ( p = 0.071) and who had ever breastfed ( p = 0.064) ( Table 1 ).