Tsu V D
Br J Obstet Gynaecol. 1993 Apr;100(4):327-33. doi: 10.1111/j.1471-0528.1993.tb12974.x.
To identify risk factors associated with postpartum haemorrhage (PPH) in order to improve the effectiveness of antenatal screening.
A population-based case control study.
Harare, Zimbabwe.
Two groups of women, one group consisting of those with postpartum haemorrhage after a normal vaginal delivery and the other of women with normal unassisted vaginal delivery without PPH.
Data abstracted from the medical records; relative risks were estimated by multivariate logistic regression.
Low parity, advanced maternal age, and antenatal hospitalisation were among the strongest risk factors, with more modest associations for history of poor maternal or perinatal outcomes and borderline anaemia at the time of booking. No association with grand multiparity was found.
These findings confirm the importance of previously recognised factors such as low parity, poor obstetric history, anaemia, and prolonged labour, but call into question the significance of grand multiparity. Previously undocumented factors such as maternal age greater than 35 years and occiput posterior head position emerged as predictors worthy of further investigation.
确定与产后出血（PPH）相关的风险因素，以提高产前筛查的有效性。
一项基于人群的病例对照研究。
津巴布韦哈拉雷。
两组女性，一组为正常阴道分娩后发生产后出血的女性，另一组为正常自然阴道分娩且未发生产后出血的女性。
从医疗记录中提取数据；通过多变量逻辑回归估计相对风险。
低产次、高龄产妇和产前住院是最强的风险因素之一，不良孕产妇或围产期结局史以及孕早期临界贫血的关联较弱。未发现与多产有关联。
这些发现证实了先前公认的因素如低产次、不良产科史、贫血和产程延长的重要性，但对多产的意义提出了质疑。先前未记录的因素如产妇年龄大于35岁和枕后位成为值得进一步研究的预测因素。
