Relation of time since last birth and parity to survival of young women with breast cancer.
We investigated whether survival was related to recent childbirth or parity in a cohort of 540 women diagnosed with breast cancer before the age of 45 years who were followed for up to 14 years. Women who had given birth within 2 years before their diagnosis of breast cancer were at increased risk of dying, compared with nulliparous women, with an adjusted relative risk of 3.1 (95% confidence interval = 1.8-5.4). There was a moderate association of parity with mortality, with an adjusted relative risk of 1.8 (95% confidence interval = 1.2-2.9) for women with three or more births, compared with nulliparous women.
Olson
S H
SH
Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Zauber
A G
AG
Tang
J
J
Harlap
S
S
D000328:Adult; D001943:Breast Neoplasms / Q000401:mortality*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D010298:Parity; D011247:Pregnancy; D011379:Prognosis; D012307:Risk Factors; D016019:Survival Analysis; D013997:Time Factors