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. 2009 Mar 10;100(7):1191–1197. doi: 10.1038/sj.bjc.6604974

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Copyright © 2009 Cancer Research UK

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Age at first sexual intercourse and age at first pregnancy are highly correlated with the risk of invasive cervical cancer (P-trend<0.001). Models were adjusted for age, centre, lifetime number of sexual partners (1, >1), parity (0, 1–4, ⩾5), and education (never, primary, secondary).