highly significantP = 1.4 × 10 −39
There was a highly significant trend in increased risk associated with BMI categories of ≥25 to <30 and ≥30 ( P = 1.4 × 10 −39 ).
There was a highly significant trend in increased risk associated with BMI categories of ≥25 to <30 and ≥30 ( P = 1.4 × 10 −39 ).
Oral contraceptive use, older age at menarche, parity, and use of systemic hormone therapy (mostly combination therapy in postmenopausal women) were inversely associated with EC risk in women with no prior cancers ( P ≤ 0.001), and there was a significant trend toward a lower risk of EC associated with older age at menarche ( P = 0.0002) and higher numbers of full‐term births ( P = 1.4 × 10 −10 ; Table 1 ).