Fig 1. ORs and 95% CIs for breast cancer in women aged <50 years with any versus no prescriptions for hormonal contraceptives by the last type prescribed.

Data from the CPRD. Adjusted ORs are adjusted for time since last birth, number of recorded births, BMI, and alcohol intake. P values are based on the relevant Wald tests. BMI, body mass index; CI, confidence interval; CPRD, Clinical Practice Research Datalink; IUD, intrauterine device; OR, odds ratio.