Fig 1.

Relative risk of endometrial cancer among parous women (≥1 birth) by number of induced abortions and births, with uniparous women with no induced abortions as reference. Estimates are adjusted for age, period, educational attainment, marital status, urbanicity, and interaction between period and age, educational attainment, marital status, and urbanicity, respectively. Events and person years (in 1000s) are given for each number of induced abortion and birth. Test for interaction between induced abortions and births, P=0.92