Endometrial cancer and oral contraceptives : an individual participant meta-analysis of 27 276 women with endometrial cancer from 36 epidemiological studies
BACKGROUND: Oral contraceptives are known to reduce the incidence rate of endometrial cancer, but it is uncertain how long this effect lasts after use ceases, or whether it is modified by other factors.METHODS: Individual participant datasets were sought from principal investigators and provided centrally for 27 276 women with endometrial cancer (cases) and 115 743 without endometrial cancer (cont
