Risk factors associated with postpartum hemorrhage among uniparas aged over 35 years from one grade 3 and first-class obstetrics and gynecology hospital of Beijing

Objective To determine the incidence and risk factors of postpartum hemorrhage among uniparas aged 35 years or older.Methods This hospital-based study included 1 065 advanced maternal age between June 2011 and May 2012 from Beijing Obstetrics and Gynecology Hospital.A multiple logistic model was used to identify risk factors independently associated postpartum hemorrhage among the pregnancy women aged over 35 years.Results The incidence of postpartum hemorrhage was 15％.Multiple Logistic analysis results showed that uterine atony (AOR ＞999.999),placenta previa (AOR:24.72 ;95％ CI:4.82-126.80),test-tube baby (AOR:5.79 ; 95 ％ CI:1.50-22.31),and term infants (AOR:0.26 ; 95 ％ CI:0.07-0.96)were the risk factors for uniparas aged over 35 years.Conclusions Uniparas aged over 35 years are high-risk groups for postpartum hemorrhage.So doctors and nurses should identify the risk factors for postpartum hemorrhage of uniparas aged over 35 years,emphasize health education and provide early treatment so that the rote of postpartum hemorrhage and the mortality of pregnancy women can be reduced. Key words: Postpartum hemorrhage; Advanced maternal age uniparas; Risk factors