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| Relationship between cesarean section and placenta previa in the Yellow River Delta |
| LIU Chao, LIANG Kuixiang, LI Rui, MA Longyue |
| Department of Obstetrics and Gynecology,Binzhou Medical University Hospital,Binzhou 256603,P.R.China |
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Abstract Objective To explore the relationship between cesarean section and placenta previa and related diseases during second pregnancy of women at childbearing age in the Yellow River Delta region.Methods Related data were retrospectively analyzed from medical centers at all levels in the Yellow River Delta region from January 2013 to October 2017. In this study, the eligible placenta previa patients were selected as the experimental group. In addition, among eligible non-patients, 3 times the number of the experimental group was randomly selected as the control group for matching, and other independent risk factors were controlled.Results In the study group and the control group,24 515 cases and 73 545 cases were found to be eligible, including 482 cases and 407 cases of placenta previa, 83 cases and 14 cases of placenta accreta,and placenta previa in both groups.There were 52 cases and 7 cases of concurrent placenta accretion.The majority of placentas located in the anterior wall of the uterus were 10 323 cases and 35 653 cases respectively, and most of them located in the posterior wall of the uterus were 14 192 cases and 37 892 cases respectively.The results of placenta previa and placenta accreta analysis in the experimental group compared with those in the control group were OR=3.55,CI[3.17－4.05],OR=17.79,CI[10.10－31.33],both with P＜0.001.The placenta previa analysis of the placenta located in the anterior and posterior walls of the uterus was OR=1.49,CI[1.25－1.79] in the experimental group,and the placental implantation data was OR=5.79,CI[3.35－9.99],both with P＜0.005.The placenta previa analysis of most placentas in the anterior and posterior walls of the uterus was OR=0.99,CI[0.81-1.20] in the control group,and placental implantation data was OR=1.42,CI[0.49-4.09],both with P＞0.05.Conclusion The history of previous cesarean section in women of childbearing age in the Yellow River Delta region is a risk factor for placenta previa and placenta accreta during second trimester pregnancy,and the location of the placenta is also related to both above, suggesting that maternity medical staff need take measures for screen, prevention and treatment as soon as possible and need to give correct pregnancy instructions.
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Received: 20 December 2017
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