Fig. 2

Magnetic resonance imaging (MRI) breast tissue measurements in relation to the participant’s size at birth (minimally adjusted estimates). ref Reference category. MRI breast measurements were log-transformed, and exponentiated estimated regression parameters, with 95 % CIs calculated by exponentiating the original 95 % CIs, are presented. Models are adjusted for the participant’s age, body mass index (BMI) and menstrual phase/hormonal contraceptive use at the time of MRI and, where appropriate, mother’s age and BMI at the time of mammography. Continuous variables were centred at the mean