Postpartum hemorrhage （PPH） is one of the most adverse obstetric outcomes. Our aim is to detect the risks of multilevel PPH in different cesarean section （CS） groups [including nulliparous CS with indications, nulliparous CS without indications, repeat cesarean （RC）, vaginal birth after cesarean （VBAC）, cesarean after vaginal birth （CAVB）]. We conducted a retrospective cohort study, and the data on 127 145 women collected from January 2014 to May 2016 and from 35 tertiary hospitals in Shanxi province, China, were reviewed. Based on the measuring results of PPH, an ordered logistic regression model was used to analyze the adjusted PPH risks for each of the CS groups, and comparisons were drawn between them. Finally, a total of 99 066 nulliparous （77.92%） and 28 079 multiparous （22.08%） women were observed. The number of CS cases was 61 117, and the rate for CS was 48.07%. A total of 10 029 women did not show indications for CS and accounted for 16.41% of the CS parturient, whereas 9103 women underwent a repeated cesarean, with a CS frequency of 14.89%. The number of VBAC cases was 989, whose rate was 9.88% in prior CS women. The number （proportions） of PPH was 3658 （2.88%） in L1 （PPH volume： ≥900 and 〈1500 mL）, 520 （0.41%） in L2 （PPH volume： ≥1500 and〈2100 mL）, and 201 （0.16%） in L3 （PPH volume： ≥2100 mL）. The Ln （n= 1, 2, 3, etc.） represented the increasing order of PPH severity. In the adjusted results, compared with spontaneous vaginal delivery （SVD） as the reference group, in the adjusted result for nulliparous, there was a decreased PPH risk in CS with indications （OR： 2.32; CI： 2.04-2.62）, which was lower than that of CS without indications （OR： 2.50; CI： 2.01-2.96）. The highest PPH risk in all subgroups （i.e. nulliparous and multiparous groups） was observed in the RC （OR： 3.61; CI： 3.16-4.17）, which was nearly twice higher than that of the VBAC （OR： 1.82; CI： 1.33-2.52）. CAVB （OR： 1.03; CI
目的梳理医院效率研究演进路径,为国内医院效率研究提供参考。方法在Web of Science数据库中以"医院效率"为主题进行检索,应用Cite Space信息可视化软件绘制医院效率研究文献共被引网络图谱。结果选取中心性≥0.05为标准,共探测出15篇关键节点文献。从效率理论与测量方法以及医院效率研究演进两个角度,对15篇关键节点文献进行梳理分析。结论效率测量的方法经历了不断突破和创新的过程,为医院效率研究提供了新的视角。医院效率的研究内容从单纯的医院效率测量研究逐渐深入到医院效率影响因素的探讨,为医院效率的改进提供了方向。
